Reproduction in Domestic Animals最新文献

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Do concentrations of non-esterified fatty acids change during gestation and lactation in healthy bitches? 健康母犬妊娠期和哺乳期的非酯化脂肪酸浓度会发生变化吗?
IF 1.6 3区 农林科学
Reproduction in Domestic Animals Pub Date : 2024-08-01 DOI: 10.1111/rda.14677
Sophie-Charlotte K Doll, Peggy Haimerl, Alexander Bartel, Sebastian P Arlt
{"title":"Do concentrations of non-esterified fatty acids change during gestation and lactation in healthy bitches?","authors":"Sophie-Charlotte K Doll, Peggy Haimerl, Alexander Bartel, Sebastian P Arlt","doi":"10.1111/rda.14677","DOIUrl":"https://doi.org/10.1111/rda.14677","url":null,"abstract":"<p><p>During the gestation and lactation period, the energy demand in pregnant and lactating bitches is elevated. Non-esterified fatty acids (NEFAs) are utilized either directly from the fed diet or from body fat storage. High NEFA concentration in the blood plasma leads to an increased risk for diseases. Therefore, measuring blood NEFA concentrations may be an indicator for a period of scarcity. The aim of this study is to explore if serum NEFA concentrations in healthy bitches change during gestation and lactation. Healthy pregnant and lactating bitches were sampled on three appointed dates around parturition. NEFA values were examined with a multiparameter clinical chemistry analyser. All statistical analyses were performed using R. Overall, 38 bitches were enrolled in the study. Twenty-one bitches were sampled on all three appointed dates. The median NEFA concentration antepartum was 0.73 mmol/L (IQR: 0.59, 1.01); during peak lactation, it was 0.57 mmol/L (IQR: 0.44, 0.82); and around weaning, it was 0.58 mmol/L (IQR: 0.46, 0.73). NEFA concentrations rose slightly with litter size in late gestation. Body condition score had no influence on observed NEFA values. We conclude that NEFA concentrations widely remain within reference ranges in well-fed pregnant and lactating bitches. Nevertheless, they may be a valuable parameter to assess the actual metabolic status of malnourished pregnant and lactating bitches.</p>","PeriodicalId":21035,"journal":{"name":"Reproduction in Domestic Animals","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141856259","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effect of pre-treatment with deslorelin on the ovarian response of ewes superovulated with FSH. 去氯羟肾上腺素预处理对 FSH 超排卵母羊卵巢反应的影响
IF 1.6 3区 农林科学
Reproduction in Domestic Animals Pub Date : 2024-08-01 DOI: 10.1111/rda.14688
Rodrigo Garcia, Rogério A Almeida Filho, Luan Sitó-Silva, Renan Denadai, Viviane Codognoto, Letícia Salgado, Suzane Brochine, Eunice Oba
{"title":"Effect of pre-treatment with deslorelin on the ovarian response of ewes superovulated with FSH.","authors":"Rodrigo Garcia, Rogério A Almeida Filho, Luan Sitó-Silva, Renan Denadai, Viviane Codognoto, Letícia Salgado, Suzane Brochine, Eunice Oba","doi":"10.1111/rda.14688","DOIUrl":"https://doi.org/10.1111/rda.14688","url":null,"abstract":"<p><p>This study evaluated the use of the GnRH agonist hormone, deslorelin, to control the follicular population before initiating multiple ovulation and embryo transfer (MOET) treatment. Twenty-four cross-bred Santa Inês ewes, aged between 2 and 4 years, were randomly assigned to either a control group (n = 11) or a treated group (n = 13). All ewes received an intravaginal device containing 60 mg of medroxyprogesterone acetate on day 0, and a new device on day 7, which remained in place until day 14. Additionally, the ewes were administered 125 μg of cloprostenol on day 7. The superovulatory treatment involved administering 200 mg of pFSH, divided into eight decreasing doses at 12-h intervals starting on day 12. On day 14, 300 IU of eCG was administered. In the deslorelin group, three doses of 100 μg of deslorelin were administered starting on day 3 after the insertion of the vaginal device, with subsequent doses given at 72-h and 144-h intervals. Natural mating was performed 36 h after the removal of the progesterone implant using males with proven fertility. Embryo collection took place on the 6th day after mating, and the recovered structures were quantified and evaluated for quality and developmental stage. Transrectal ultrasonography was conducted on days 12, 16 and 21 to evaluate the ovaries, specifically to assess the ovarian follicular population and the presence of the corpus luteum. Ewes in the control group had higher embryo recovery rates (p < .01) compared to the treated group (5.2 ± 0.8 vs. 1.1 ± 0.8), with differences observed primarily in the number of morulae. The number of corpus luteum observed during the laparotomy on day 21 was significantly higher (p < .01) in the control group (10.44 vs. 4.5 corpus luteum per ewe). Yet, the treated group had a significantly higher number of follicles (p < .05) on the first day of pFSH application (5.5 vs. 3.0 follicles per ewe). In conclusion, although the inclusion of deslorelin in the superovulation protocol resulted in increased synchronization of oestrus and follicle number, it did not lead to an increase in the number of corpus luteum or harvested embryos.</p>","PeriodicalId":21035,"journal":{"name":"Reproduction in Domestic Animals","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141902756","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Analysis of physical traits, clinical parameters, and energy metabolism of in vivo- and in vitro-derived Flemish newborn calves during the first day of life. 分析活体和体外法兰德斯新生小牛出生后第一天的体格特征、临床参数和能量代谢。
IF 1.6 3区 农林科学
Reproduction in Domestic Animals Pub Date : 2024-07-01 DOI: 10.1111/rda.14676
Luís Fernando Schütz, Fabiano Carminatti Zago, Luís Henrique de Aguiar, Fabiana Forell, Leonardo Tondello Martins, Monica Urio, Pedro Claudino Dos Santos Neto, Jamir Machado Junior, Kaio Cesar Simiano Tavares, Saul Gaudêncio Neto, Cristiano Feltrin, Alceu Mezzalira, Marcelo Bertolini
{"title":"Analysis of physical traits, clinical parameters, and energy metabolism of in vivo- and in vitro-derived Flemish newborn calves during the first day of life.","authors":"Luís Fernando Schütz, Fabiano Carminatti Zago, Luís Henrique de Aguiar, Fabiana Forell, Leonardo Tondello Martins, Monica Urio, Pedro Claudino Dos Santos Neto, Jamir Machado Junior, Kaio Cesar Simiano Tavares, Saul Gaudêncio Neto, Cristiano Feltrin, Alceu Mezzalira, Marcelo Bertolini","doi":"10.1111/rda.14676","DOIUrl":"https://doi.org/10.1111/rda.14676","url":null,"abstract":"<p><p>Studies investigating physiological deviations from normality in newborn calves derived from in vitro fertilization procedures remain important for the understanding of factors that reduce calf survival after birth. The aim of this study was to investigate parameters affecting health and welfare of newborn Flemish calves derived from in vitro embryo production (IVP) in the first hours of life in comparison to in vivo-derived calves. Physical traits of newborn calves and fetal membranes (FM) were recorded soon after birth. Newborn venous blood samples were collected at several time points within the first 24 h of life for analyses of energy substrates, electrolytes, blood gases, acid-base balance, blood chemistry, and haematology. A liver biopsy was taken within the first hour after birth for analysis of gene expression of key enzymes of the fructolytic and glycolytic pathways. Newborn IVP calves were heavier and larger at birth, which was associated with heavier FM. At several time points during the first 24 h of life, IVP-derived calves had altered rectal temperature, blood gases, electrolyte concentrations, blood parameters for liver, kidney and muscle function, and acid-base balance, plasma lipid metabolism, and hemogram parameters. The relative mRNA abundances for triokinase and lactate dehydrogenase-B were greater in IVP calves. In summary, IVP-derived newborn calves were at higher risk of clinical problems after birth, which was markedly greater in heavier and larger calves. Such animals take longer to adapt to extrauterine life and should receive a special attention during the immediate neonatal period.</p>","PeriodicalId":21035,"journal":{"name":"Reproduction in Domestic Animals","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141634357","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Correction to 'Exploring oxidative stress, immunological and metabolic biomarkers in dairy cows with postpartum pyometra'. 探讨产后子宫脓肿奶牛的氧化应激、免疫和代谢生物标志物 "的更正。
IF 1.6 3区 农林科学
Reproduction in Domestic Animals Pub Date : 2024-07-01 DOI: 10.1111/rda.14650
{"title":"Correction to 'Exploring oxidative stress, immunological and metabolic biomarkers in dairy cows with postpartum pyometra'.","authors":"","doi":"10.1111/rda.14650","DOIUrl":"https://doi.org/10.1111/rda.14650","url":null,"abstract":"","PeriodicalId":21035,"journal":{"name":"Reproduction in Domestic Animals","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141470509","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Impact of age at first calving on fertility and production performance in Murrah buffalo. 初产年龄对穆拉水牛繁殖力和生产性能的影响
IF 1.6 3区 农林科学
Reproduction in Domestic Animals Pub Date : 2024-07-01 DOI: 10.1111/rda.14691
Rupali Rautela, Sanjay Kumar, Rakesh Kumar Sharma, Sushil Kumar Phulia, Rajesh Kumar, Madhu Singh, Rahul Katiyar, Anurag Bharadwaj, Tirtha Kumar Datta
{"title":"Impact of age at first calving on fertility and production performance in Murrah buffalo.","authors":"Rupali Rautela, Sanjay Kumar, Rakesh Kumar Sharma, Sushil Kumar Phulia, Rajesh Kumar, Madhu Singh, Rahul Katiyar, Anurag Bharadwaj, Tirtha Kumar Datta","doi":"10.1111/rda.14691","DOIUrl":"https://doi.org/10.1111/rda.14691","url":null,"abstract":"<p><p>The present study analyses the effect of age at first calving (AFC) on future fertility and productivity in Murrah buffaloes. The data of 314 buffalo heifers of animal farm section, ICAR-CIRB, Hisar were collected over a period of 9 years from 2010 to 2018. The buffalo heifers were categorized into six groups according to the AFC named as 30-35, 36-41, 42-47, 48-53, 54-59 and 60-65 months. The influence of AFC on standard lactation milk (SLMY), peak yield (PY), days in milk (DIM), calving to first service, service per conception, calving to conception interval (CCI) and calving interval till fifth lactation were studied. The study revealed poor productive traits in buffalo heifers calved at younger age (30-35 months) during first parity. The productive value positively corresponded with increase in AFC. During successive lactations, higher mean milk yield (SLMY and PY) was found in groups with 36-41, 42-47 and 48-53 months. The mean number of services per conception was lower in buffalo heifers with 36-41 and 42-47 months following first calving till fifth lactation. Similarly, the said groups had lower mean calving to first service, CCI and CI up to fifth lactation. The survival rate was higher in heifers with AFC 36-41, 42-47, 48-53 and 54-59 months than with AFC 30-35 and 60-65 months. The buffalo heifers with 36-41 and 42-47 months of AFC had higher survival rate and better productive and reproductive traits till fifth parity in the current study. The study concluded that a minimum ideal AFC of 36-41 months yielded the highest productive gain.</p>","PeriodicalId":21035,"journal":{"name":"Reproduction in Domestic Animals","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141748976","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Estimation of maternal and additive effect on reproduction and productive traits in Hardhenu cattle. 哈德努牛繁殖和生产性状的母性效应和加性效应估算
IF 1.6 3区 农林科学
Reproduction in Domestic Animals Pub Date : 2024-07-01 DOI: 10.1111/rda.14658
Devesh Kumar Yadav, Zile S Malik, Ankit Magotra, Yogesh C Bangar, Pushpa
{"title":"Estimation of maternal and additive effect on reproduction and productive traits in Hardhenu cattle.","authors":"Devesh Kumar Yadav, Zile S Malik, Ankit Magotra, Yogesh C Bangar, Pushpa","doi":"10.1111/rda.14658","DOIUrl":"https://doi.org/10.1111/rda.14658","url":null,"abstract":"<p><p>The study aimed to assess performance traits in Hardhenu cattle by analysing data from 445 animals born to 59 sires and 227 dams. The investigation focused on estimating (co)variance components and genetic parameters for reproduction and production traits in dairy cattle. Results from least-squares analysis indicated a significant effect (p < .01) of the period of calving (POC) on key production traits, including first lactation milk yield (FLMY), 300-day milk yield (FLMY300), first peak yield (FPY) and total lactation milk yield (TLMY) in studied population. The least squares means for these traits were reported as follows: FLMY (2665.68 ± 45.66 kg), FLMY300 (2425.52 ± 34.41 kg), FLL (312.95 ± 3.83 days), FPY (11.52 ± 0.15 kg) and TLMY (9282.44 ± 167.03 kg) in Hardhenu cattle. In the studied population, only additive genetic variability was found to be present and there was absence of any significant maternal effect with respect to targeted traits in the resource population. Direct heritability estimates (h<sup>2</sup>) for FLMY, FLMY300, FLL, FPY, TLMY and other traits ranged from 0.03 to 0.41 in Hardhenu cattle. These findings offer valuable insights into the genetic factors influencing performance traits, contributing to the enhancement of breeding and management practices in Hardhenu cattle.</p>","PeriodicalId":21035,"journal":{"name":"Reproduction in Domestic Animals","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141470510","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effects of supplementation of grazing Nellore cows with β-carotene and vitamins A + D3 + E + biotin on follicle diameter, oestrus, establishment of pregnancy, and foetal morphometry. 给放牧的内洛尔奶牛补充β-胡萝卜素和维生素A + D3 + E +生物素对卵泡直径、发情、妊娠和胎儿形态的影响。
IF 1.6 3区 农林科学
Reproduction in Domestic Animals Pub Date : 2024-07-01 DOI: 10.1111/rda.14660
L Factor, G S F M Vasconcellos, V V Carvalho, T Acedo, C Cortinhas, R C Chebel, P S Baruselli
{"title":"Effects of supplementation of grazing Nellore cows with β-carotene and vitamins A + D3 + E + biotin on follicle diameter, oestrus, establishment of pregnancy, and foetal morphometry.","authors":"L Factor, G S F M Vasconcellos, V V Carvalho, T Acedo, C Cortinhas, R C Chebel, P S Baruselli","doi":"10.1111/rda.14660","DOIUrl":"https://doi.org/10.1111/rda.14660","url":null,"abstract":"<p><p>The objectives of this experiment were to evaluate the effects of supplementation of Nellore (Bos indicus) cows with β-carotene + vitamins A + D3 + E + biotin on body condition score (BCS), oestrus, pregnancy, and foetal morphometry. Lactating cows (n = 497) from two herds were balanced for BCS and calving period [early calving (EC); late calving (LC)] and were assigned randomly to: Control (n = 251)-supplementation with a mineral supplement; and SUP (n = 246)-supplementation with the mineral supplement fed to control + β-carotene (150 mg/day) + vitamin A (40,000 IU/day) + vitamin D3 (5000 IU/day) + vitamin E (300 mg/day) + biotin (20 mg/day). Cows were supplemented from Days -30 to 30 (Day 0 = timed artificial insemination; TAI). Pregnancy was diagnosed 30 days after TAI and foetal crown-rump distance and thoracic diameter were measured at 30 and 77 days of gestation. Cows in the SUP treatment were more likely to have BCS ≥3.0 on Day 0 (63.0 ± 3.1 vs. 60.2 ± 3.1; p < .01) and were more likely to gain BCS from Days -30 to 30 (57.7 ± 3.3 vs. 44.1 ± 3.3%; p < .01). Fewer LC cows in the SUP treatment were detected in oestrus at the time of the first TAI (Control: LC: 75.4 ± 4.4 vs. SUP: LC: 64.0 ± 5.2 vs. Control: EC: 65.3 ± 4.0 vs. SUP: EC: 71.8 ± 3.7; p = .04). There was a tendency for the SUP treatment to increase pregnancy to the first TAI (64.2 ± 3.0 vs. 56.6 ± 3.1%; p = .08). A greater percentage of SUP cows was detected in oestrus at the time of the second TAI (70.1 ± 5.0 vs. 52.3 ± 4.8%; p = .01). The SUP treatment increased pregnancy to the second TAI among LC cows (SUP: LC: 75.9 ± 8.0% vs. Control: LC: 50.0 ± 8.3% vs. Control: EC: 52.0 ± 5.9% vs. SUP: EC: 41.4 ± 6.5%; p = .02). The SUP treatment increased foetal size (crown-rump; p = .04 and thoracic diameter; p < .01) at 30 days of gestation and, despite decreasing crow-rump length at 77 days after the first TAI among EC cows (p < .01), it increased the thoracic diameter at 77 days after the first TAI independent of calving season. Our results support that pregnancy establishment and foetal growth can be improved when grazing Nellore cows are supplemented with β-carotene and vitamins A + D3 + E + biotin.</p>","PeriodicalId":21035,"journal":{"name":"Reproduction in Domestic Animals","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141498803","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The effect of exogenous melatonin administration before superovulation on embryo yield in Assaf ewes. 在超排卵前注射外源性褪黑素对阿萨夫母羊胚胎产量的影响
IF 1.6 3区 农林科学
Reproduction in Domestic Animals Pub Date : 2024-07-01 DOI: 10.1111/rda.14668
Omer Faruk Yesilkaya, Huseyin Erdem
{"title":"The effect of exogenous melatonin administration before superovulation on embryo yield in Assaf ewes.","authors":"Omer Faruk Yesilkaya, Huseyin Erdem","doi":"10.1111/rda.14668","DOIUrl":"https://doi.org/10.1111/rda.14668","url":null,"abstract":"<p><p>The aim of this study was to determine the effect of exogenous melatonin administration on transferable embryos by increasing total antioxidant status before superovulation in Assaf ewes. Selected ewes were randomly divided into two equal groups: melatonin (n = 9) and control (n = 9). In the melatonin group, a melatonin implant (18 mg melatonin, Regulin®, Ceva, Turkey) was placed under the skin of the ear 7 days prior to insertion of the progesterone-containing sponge. In the control group, a physiological saline solution was injected under the skin of the ear on the same day. The same superovulation protocol was used in both groups. In addition, blood samples for determination of Glutathione peroxidase, superoxide dismutase, total antioxidant status and total oxidant status concentrations were collected on five different days, including the day of melatonin implant placement (Day-7), vaginal sponge insertion (Day 0), vaginal sponge removal (Day 11), mating (Day 12-13) and uterine flushing (Day 19). Embryos were collected by laparotomy on the 7th day after mating. Uterine flushing taken into petri dishes were scanned under a stereomicroscope, and the quality and developmental stages of the embryos were recorded. In the study, total corpus luteum count and total cell count were found to be higher in the control group than in the melatonin group (p < .05). When the results were evaluated in terms of oxidative stress index, a negative correlation was found between the total number of corpus luteum, number of cells obtained, count of transferable embryos and number of Grade 1 embryos on Day 0. There was also a positive correlation oxidative stress index and the number of unfertilized oocytes on Day-7. As a result, exogenous melatonin administration prior to superovulation during the breeding season is thought to have a negative effect on embryo yield and quality. Therefore, the use of exogenous melatonin in MOET studies during the breeding season is recommended to be investigated in new studies.</p>","PeriodicalId":21035,"journal":{"name":"Reproduction in Domestic Animals","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141564207","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Influence of additive and maternal effects on production and reproduction traits in Murrah buffaloes: Insights from Bayesian analysis. 附加效应和母性效应对穆拉水牛生产和繁殖性状的影响:贝叶斯分析的启示
IF 1.6 3区 农林科学
Reproduction in Domestic Animals Pub Date : 2024-07-01 DOI: 10.1111/rda.14675
Rohit Sharma, Satpal Dahiya, Yogesh Chandrakant Bangar, Dipin Chander Yadav
{"title":"Influence of additive and maternal effects on production and reproduction traits in Murrah buffaloes: Insights from Bayesian analysis.","authors":"Rohit Sharma, Satpal Dahiya, Yogesh Chandrakant Bangar, Dipin Chander Yadav","doi":"10.1111/rda.14675","DOIUrl":"https://doi.org/10.1111/rda.14675","url":null,"abstract":"<p><p>The aim of this research was to assess genetic parameters for first lactation production and reproduction traits in Murrah buffaloes by employing additive and maternal effects. Data on pedigree and specific traits of 640 Murrah buffaloes were gathered from 1997 to 2020. These traits encompassed first lactation milk yield (FLMY), 305-day first lactation milk yield (305FLMY), first lactation length (FLL), first lactation peak yield (FPY), first service period (FSP), first calving interval (FCI) and first dry period (FDP). Genetic evaluations employed six univariate animal models, accounting for both direct and maternal effects, facilitated by THRGIBBS1F90 and POSTGIBBSF90 programs. Fixed factors included in the analysis were period of calving, season of calving and age at first calving. The Bayesian estimates for direct heritability, derived from the most suitable model, were as follows: FLMY: 0.28 ± 0.01, 305FLMY: 0.30 ± 0.01, FLL: 0.19 ± 0.01, FPY: 0.18 ± 0.01, FSP: 0.12 ± 0.01, FCI: 0.14 ± 0.01 and FDP: 0.12 ± 0.01. Maternal effects were found significant, ranging from 5% to 10%, in first lactation traits under Model 2 and Model 5. Additionally, positive and significant genetic and phenotypic correlations were observed among the studied traits. In conclusion, selection based on 305-day first lactation milk yield suggests potential for genetic enhancement in Murrah buffaloes, advocating its inclusion in breeding programmes to bolster early performance. Also, consideration of maternal influences is necessary for genetic progress of animals.</p>","PeriodicalId":21035,"journal":{"name":"Reproduction in Domestic Animals","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141617071","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Uterine tone: A neglected criterion for the selection of bovine embryo transfer recipients. 子宫张力:选择牛胚胎移植受体的一个被忽视的标准。
IF 1.6 3区 农林科学
Reproduction in Domestic Animals Pub Date : 2024-07-01 DOI: 10.1111/rda.14671
Cristiano Rodrigues Borges Guimarães, Matheus Felipe Seber, José da Páscoa Nascimento Neto, Carlos Antônio Carvalho Fernandes, Éder Pereira Campos Drumond Rodrigues, Bárbara Azevedo Pereira Torres, João Henrique Moreira Viana, Miller Pereira Palhão
{"title":"Uterine tone: A neglected criterion for the selection of bovine embryo transfer recipients.","authors":"Cristiano Rodrigues Borges Guimarães, Matheus Felipe Seber, José da Páscoa Nascimento Neto, Carlos Antônio Carvalho Fernandes, Éder Pereira Campos Drumond Rodrigues, Bárbara Azevedo Pereira Torres, João Henrique Moreira Viana, Miller Pereira Palhão","doi":"10.1111/rda.14671","DOIUrl":"https://doi.org/10.1111/rda.14671","url":null,"abstract":"<p><p>This study evaluated the relationship between CL features assessed by ultrasound (luteal tissue area and blood flow, BF) or rectal palpation (size), uterine tone (UT), plasma progesterone (P4) concentration on Day 7 (D7) and subsequent pregnancy outcomes in bovine embryo recipients. A total of 163 cows and heifers were included in this study. The expected day of ovulation after the synchronization protocol was designated as D0. On D7, ovaries and uterus were examined by ultrasonography and rectal palpation, and subjective scores (1-3 scale) were assigned for CL size, area and BF, and for UT. Blood samples were collected for further P4 analysis. Each embryo recipient then received a grade I frozen-thawed in vivo-produced blastocyst, which was transferred to the uterine horn ipsilateral to the CL. Pregnancy diagnosis was performed on D35, and the results were retrospectively compared with the assigned scores for CL and UT. We observed a significant (p < .02) interaction between CL size and UT, with a progressive increase in the likelihood of pregnancy for recipients bearing a large CL among those with turgid UT. Ultrasound scoring of the CL using B-mode and Doppler-mode did not significantly predict pregnancy rates on D35 (p < .6 and p < .5, respectively). However, logistic regression analysis revealed a trend towards a quadratic effect (p < .08 and p < .06) indicating that the probability of pregnancy varied according to the area of luteal tissue and P4 concentrations, respectively. No significant (p > .05) association was found between the probability of pregnancy and the BF area of the CL. In summary, UT before embryo transfer may reflect successful recipient synchronization. Elevated P4 levels, assessed by CL size, may offset uterine contractility, mitigating adverse effects. Additionally, the CL area may be more important than its vascularization area when evaluating recipients D7 after ovulation.</p>","PeriodicalId":21035,"journal":{"name":"Reproduction in Domestic Animals","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141617073","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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