Animal Science Journal最新文献_第9页

Effects of various levels of coated cysteamine hydrochloride in the diet on feed intake, digestibility, ruminal fermentation, and blood metabolites in growing Charolais crossbred cattle 日粮中不同水平的半胱胺盐酸盐对夏洛莱杂交牛的采食量、消化率、瘤胃发酵和血液代谢物的影响。

IF 1.7 3区农林科学

Animal Science Journal Pub Date : 2024-10-03 DOI: 10.1111/asj.13997

Watcharawit Meenongyai, Kannika Wongpanit, Piyamas Phongkaew, Pichad Khejornsart, Pramoet Kamkuan, Phongphet Khamngamdi, Nattawut Kokaew, Sahapap Papsaree, Chayanun Tammanoi, Nuttawut Namwongsa, Natthaphon Phungkrathok, Artsani Srijan, Chakkrit Siriket, Naroon Waramit, Tanmay Modak, Md Abdur Rahman, Md Sifat Habib Siam, A. K. M. Ahsan Kabir, Noboru Manabe

{"title":"Effects of various levels of coated cysteamine hydrochloride in the diet on feed intake, digestibility, ruminal fermentation, and blood metabolites in growing Charolais crossbred cattle","authors":"Watcharawit Meenongyai, Kannika Wongpanit, Piyamas Phongkaew, Pichad Khejornsart, Pramoet Kamkuan, Phongphet Khamngamdi, Nattawut Kokaew, Sahapap Papsaree, Chayanun Tammanoi, Nuttawut Namwongsa, Natthaphon Phungkrathok, Artsani Srijan, Chakkrit Siriket, Naroon Waramit, Tanmay Modak, Md Abdur Rahman, Md Sifat Habib Siam, A. K. M. Ahsan Kabir, Noboru Manabe","doi":"10.1111/asj.13997","DOIUrl":"10.1111/asj.13997","url":null,"abstract":"This study investigated the impact of different levels of coated cysteamine hydrochloride (CSH) supplementation on ruminal fermentation, nutrient digestibility, and blood metabolites in Charolais cross bulls. Twelve bulls were allotted to three feeding treatments in a replicated 3 × 3 Latin square design: 0% CSH (control), 0.5% CSH, and 1.0% CSH in concentrate. Animals were fed concentrate at 1.5% of body weight. Dry matter intake (DMI) and DMI as a percentage of body weight showed no significant differences among treatments (p > 0.10). Nutrient digestibility was consistent across treatments, except for a slight decrease in NDF digestibility with 1% CSH (p = 0.07). Ruminal pH, ammonia nitrogen, volatile fatty acid (VFA) proportions, and total VFA concentration were similar among treatments (p > 0.05). Total bacteria, fungal zoospores, and protozoa populations in the rumen did not vary significantly (p > 0.05). Blood glucose and triglyceride concentrations remained stable (p > 0.05), while blood urea nitrogen (BUN) levels were higher in CSH-supplemented groups (p < 0.05). In conclusion, incorporating CSH levels ranging from 0.5% to 1.0% into the diet did not adversely affect feed intake, ruminal fermentation, or microbial populations. Additionally, 1.0% CSH improved BUN concentration in growing Charolais cross bulls.","PeriodicalId":7890,"journal":{"name":"Animal Science Journal","volume":"95 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2024-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142370788","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

Changes in mammary infection status in dairy cows during the dry period using dry cow therapy approaches on three farms 在三个牧场采用干奶疗法，观察奶牛在干奶期乳腺感染状况的变化。

IF 1.7 3区农林科学

Animal Science Journal Pub Date : 2024-10-01 DOI: 10.1111/asj.13993

Hajime Nagahata, Nodoka Komori, Mayu Fukutome, Tomochika Sugiura, Keiichi Hisaeda, Satoshi Gondaira, Hidetoshi Higuchi, Tatsuya Ando, Ken Nakada

{"title":"Changes in mammary infection status in dairy cows during the dry period using dry cow therapy approaches on three farms","authors":"Hajime Nagahata, Nodoka Komori, Mayu Fukutome, Tomochika Sugiura, Keiichi Hisaeda, Satoshi Gondaira, Hidetoshi Higuchi, Tatsuya Ando, Ken Nakada","doi":"10.1111/asj.13993","DOIUrl":"10.1111/asj.13993","url":null,"abstract":"This case study evaluated the mammary infection status of dairy cows during the dry periods and explored the associated problems in their quarters with dry cow therapy (DCT). This study assessed intramammary infections, antibiotic efficacy, and antimicrobial resistance of pathogens in 464-quarter milk samples from 59 dairy cows during the dry periods after applying blanket DCT, non-DCT, and selective DCT approaches on three farms. The recovery rates of intramammary infections were 95% (19/20 quarters) with blanket DCT on farm A, 70% (14/20) with non-DCT on farm B, and 19% (4/21) with selective DCT on farm C. Analysis of mammary infections in cows with DCT revealed that mammary infections were controlled by blanket DCT, well controlled by non-DCT, and substantial problems remained in selective DCT. Lower intramammary infection prevalence in the quarters at postpartum appeared to be associated with higher recovery of mammary infections, fewer new infections, and lower uncured mammary infections within the herds. Antibacterial resistance in 14 coagulase-negative staphylococci isolated to six antimicrobial drugs was suggested to be linked to antibiotic use on the farm. Follow-up studies on the quarter-based infection status with DCT will assist in improving mastitis control in cows during the dry period.","PeriodicalId":7890,"journal":{"name":"Animal Science Journal","volume":"95 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142339539","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

Genetic parameters of behavior traits of beef cattle classified using wearable devices 利用可穿戴设备对肉牛行为特征的遗传参数进行分类。

IF 1.7 3区农林科学

Animal Science Journal Pub Date : 2024-10-01 DOI: 10.1111/asj.14002

Akio Onogi, Riku Fujii, Toshio Watanabe, Atsushi Ogino, Masakazu Shinomiya, Kazuhito Kurogi

{"title":"Genetic parameters of behavior traits of beef cattle classified using wearable devices","authors":"Akio Onogi, Riku Fujii, Toshio Watanabe, Atsushi Ogino, Masakazu Shinomiya, Kazuhito Kurogi","doi":"10.1111/asj.14002","DOIUrl":"10.1111/asj.14002","url":null,"abstract":"With the development of wearable devices, it is now possible to monitor livestock behavior 24 h a day. In this study, we estimated the genetic parameters of the daily duration of six behaviors (feeding, moving, lying, standing, ruminating while lying, and ruminating while standing) in beef cattle, automatically classified using wearable devices. The devices were attached to 332 Japanese beef cattle at two stations for approximately 5 months. We compared repeatability, Poisson regression, and random regression models using the deviance information criterion. Poisson regression models were selected for all traits at each station, probably because of the non-normal distribution of the phenotypes. The heritability estimates by the Poisson regression models were moderate at each station: 0.67 and 0.68 for feeding, 0.68 and 0.53 for moving, 0.47 and 0.55 for lying, 0.45 and 0.40 for standing, 0.51 and 0.59 for ruminating while lying, and 0.37 and 0.45 for ruminating while standing. The genetic correlations between these traits were all negative at both stations, whereas the residual correlations showed different directions depending on the station. Although validation studies with larger populations are needed to confirm these findings, this study provides fundamental knowledge of the genetic basis of daily behavior in beef cattle.","PeriodicalId":7890,"journal":{"name":"Animal Science Journal","volume":"95 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142339540","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

In vitro rumen fermentation characteristics of bakery by-products containing high starch and sugar 含高淀粉和糖的焙烤食品副产品的体外瘤胃发酵特性。

IF 1.7 3区农林科学

Animal Science Journal Pub Date : 2024-09-28 DOI: 10.1111/asj.14000

Sandi Nayohan, Miyu Sekoguchi, Yoshimasa Nishikawa, Masaya Matamura, Anuraga Jayanegara, Hiroki Matsui, Makoto Kondo

{"title":"In vitro rumen fermentation characteristics of bakery by-products containing high starch and sugar","authors":"Sandi Nayohan, Miyu Sekoguchi, Yoshimasa Nishikawa, Masaya Matamura, Anuraga Jayanegara, Hiroki Matsui, Makoto Kondo","doi":"10.1111/asj.14000","DOIUrl":"10.1111/asj.14000","url":null,"abstract":"The objectives of this study were to evaluate the nutritional characteristics of bakery by-products (castella, pancake, baumkuchen) and their effect on rumen fermentation in vitro as compared with steam-flaked corn and barley as human-edible grains. The fermentation pattern of sugar and starch as pure components was also investigated. Additionally, rumen pH was evaluated using a low-capacity buffer. Bakery by-products contained high sugar (212–590 g/kg DM) and starch (262–545 g/kg DM). Castella exhibited the highest sugar content, whereas pancake and baumkuchen were rich in starch and ether extract within bakery by-products, respectively. The gas production rate at the early phase of incubation was higher in bakery by-products than in grains, and the highest in castella among all feeds. Bakery by-products produced higher total organic acids and propionate than grains. Bakery by-products also exhibited a lower rumen pH than grains during twenty-four hours of incubation with a low-capacity buffer. As pure components, sucrose showed a higher gas production rate and lower pH than starch. Overall, compared with grains, bakery by-products have the potential not only to supply more energy to ruminants but also decrease rumen pH because sugar and starch in bakery by-products ferment rapidly and produce higher organic acids in the rumen.","PeriodicalId":7890,"journal":{"name":"Animal Science Journal","volume":"95 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2024-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/asj.14000","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142339541","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Protective effects of sodium humate on the intestinal barrier damage of Salmonella Typhimurium-challenged broilers 腐植酸钠对伤寒沙门氏菌挑战肉鸡肠道屏障损伤的保护作用

IF 1.7 3区农林科学

Animal Science Journal Pub Date : 2024-09-27 DOI: 10.1111/asj.14004

Weiming Ma, Xing Zou, Xinyu Sun, Wenzhe Wang, Kexin Liu, Yanjun He, Yun Liu, Dong Wang

{"title":"Protective effects of sodium humate on the intestinal barrier damage of Salmonella Typhimurium-challenged broilers","authors":"Weiming Ma, Xing Zou, Xinyu Sun, Wenzhe Wang, Kexin Liu, Yanjun He, Yun Liu, Dong Wang","doi":"10.1111/asj.14004","DOIUrl":"https://doi.org/10.1111/asj.14004","url":null,"abstract":"Salmonella Typhimurium (S. Typhimurium) infections can lead to severe intestinal damage and reduce growth performance in broilers. Thus, this study examined the potential mitigating impact of sodium humate (HNa) on intestinal barrier damage resulting from S. Typhimurium infection in broilers. A total of 320 1-day-old Arbor Acres broilers were randomly assigned into 5 treatments with 8 replicates. On d 22–24, broilers in the CON group were challenged with 1 ml of PBS, while broilers in the other groups were challenged with 1 ml of 3 × 109 CFU/ml S. Typhimurium, daily. Dietary administration with 4 g/kg of HNa increased (P < 0.05) the final body weight, jejunal secretory immunoglobulin A (sIgA), total antioxidant capacity (T-AOC), total superoxide dismutase (T-SOD), and catalase (CAT) levels as compared with the MOD group broilers. Furthermore, HNa alleviated intestinal barrier damage by increasing villus height (VH), upregulating protein expression of Occludin, Claudin-1, and zonula occludens-1 (ZO-1), inhibiting toll-like receptor 4 (TLR4)/nuclear factor kappa-B (NF-κB) signaling pathway activation, and decreasing the secretion of inflammatory cytokines (P < 0.05). Collectively, the present study showed that HNa mitigated intestinal barrier damage induced by S. Typhimurium infection in broilers.","PeriodicalId":7890,"journal":{"name":"Animal Science Journal","volume":"95 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2024-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142324562","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 parity, calving season, and previous lactation's milk yield on fertility of dairy cows on a commercial farm 奶牛的奇数、产仔季节和上一泌乳期的产奶量对商业化牧场奶牛繁殖力的影响

IF 1.7 3区农林科学

Animal Science Journal Pub Date : 2024-09-27 DOI: 10.1111/asj.13998

Yosuke Sasaki, Seishiro Kaneda, Tomoya Minamino, Kazuyuki Honkawa, Yoichiro Horii

{"title":"Effects of parity, calving season, and previous lactation's milk yield on fertility of dairy cows on a commercial farm","authors":"Yosuke Sasaki, Seishiro Kaneda, Tomoya Minamino, Kazuyuki Honkawa, Yoichiro Horii","doi":"10.1111/asj.13998","DOIUrl":"https://doi.org/10.1111/asj.13998","url":null,"abstract":"This study investigated the effects of parity, season, and the previous lactation's milk yield on fertility in dairy cows. A total of 5,514 calving records for Holstein cows that calved between 2016 and 2018 on a single large dairy farm in Japan were used for analysis. The proportion of cows that get pregnant by 360 days after calving was defined as the percentage of all cows eligible for breeding that became pregnant. In the all-cow model, pregnancy probability associated with both parity and calving season (p < 0.05). Pregnancy probability decreased with an increase in parity, with hazard ratios (HRs) of 1.75 (1.58–1.94) for parity 1, 1.25 (1.13–1.39) for parity 2, 1.15 (1.04–1.29) for parity 3, and 1.13 (1.00–1.27) for parity 4, relative to parity ≥5. In terms of calving season, the lowest pregnancy probability was found in spring, and the HRs relative to spring were 1.16 (1.07–1.26) for summer, 1.35 (1.24–1.47) for autumn, and 1.17 (1.07–1.27) for winter. In the multiparous-cow model, pregnancy probability associated with the previous lactation's milk yield (p < 0.05), but not with parity or calving season. Cows with high and middle previous milk yields had lower pregnancy probabilities than those with low milk yields.","PeriodicalId":7890,"journal":{"name":"Animal Science Journal","volume":"95 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2024-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142324561","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

PMEL p.L18del associates with beef quality of Kumamoto sub-breed of Japanese Brown cattle PMEL p.L18del 与日本褐牛熊本亚种牛肉品质的关系

IF 1.7 3区农林科学

Animal Science Journal Pub Date : 2024-09-24 DOI: 10.1111/asj.14003

Taito Yamashita, Toko Hatakeyama, Syun Hashimoto, Toshiaki Inenaga, Atsushi Kashimura, Hirokazu Matsumoto

引用次数: 0

Rocket seed meal (Eruca sativa) can replace soybean meal in fattening lamb diets improving performance, protein metabolism, and economic balance 火箭籽粉（Eruca sativa）可替代育肥羔羊日粮中的豆粕，改善羔羊的生长性能、蛋白质代谢和经济平衡

IF 1.7 3区农林科学

Animal Science Journal Pub Date : 2024-09-22 DOI: 10.1111/asj.13994

Gamal A. Mousa, Ahmed E. Kholif, Einar Vargas-Bello-Pérez, Mohamed M. Abdo, Ola G. A. Hassan

{"title":"Rocket seed meal (Eruca sativa) can replace soybean meal in fattening lamb diets improving performance, protein metabolism, and economic balance","authors":"Gamal A. Mousa, Ahmed E. Kholif, Einar Vargas-Bello-Pérez, Mohamed M. Abdo, Ola G. A. Hassan","doi":"10.1111/asj.13994","DOIUrl":"https://doi.org/10.1111/asj.13994","url":null,"abstract":"The study determined the effects of replacing different levels of soybean meal (SBM) with rocket seed cake (RSC) in the diets of growing lambs on feed utilization and growth performance. Twenty-eight male lambs (180 ± 5 d old) were divided into four groups in a complete randomized design with repeated measures for 105 d. Soybean meal was replaced with RSC at 0% (RSC0), 25% (RSC25), 50% (RSC50), and 75% (RSC75). The RSC75 group had the lowest final weight, total weight gain, and daily weight gain. The RSC25 increased (P < 0.001) the intakes of DM, starch value (SV), total digestible nutrients (TDN), digestible energy (DE), and digestible crude protein (DCP) compared to the other diets, while the RSC75 decreased these values. Moreover, the RSC25 decreased (P < 0.05) feed conversion of DM compared to other diets. Treatments did not affect nutrient digestibility or diet's nutritive values expressed as true SV, TDN, DCP, and DE. The RSC linearly increased albumin and urea and lowered the high-density lipoprotein concentrations in lamb's blood. The inclusion of RSC in the diet increased economic efficiency, with the highest relative percentages of net revenue with the RSC25. Overall, RSC can replace SBM at 25% in the diet of growing lambs.","PeriodicalId":7890,"journal":{"name":"Animal Science Journal","volume":"95 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2024-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/asj.13994","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142276528","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Path planning optimization for swine manure-cleaning robots through enhanced slime mold algorithm with cellular automata 通过细胞自动机增强粘模算法优化猪粪清理机器人的路径规划

IF 1.7 3区农林科学

Animal Science Journal Pub Date : 2024-09-22 DOI: 10.1111/asj.13992

Yong Peng Duan, Ya Zhi Yang, Yue Cao, Hao Ming Li, Ze Wei Hu, Ri Liang Cao, Zhen Yu Liu

{"title":"Path planning optimization for swine manure-cleaning robots through enhanced slime mold algorithm with cellular automata","authors":"Yong Peng Duan, Ya Zhi Yang, Yue Cao, Hao Ming Li, Ze Wei Hu, Ri Liang Cao, Zhen Yu Liu","doi":"10.1111/asj.13992","DOIUrl":"https://doi.org/10.1111/asj.13992","url":null,"abstract":"One of the primary challenges for robotic manure cleaners in pig farming is to plan the shortest path to designated cleaning points under specified conditions with minimal processing cost and time, while avoiding collisions. However, pigs are randomly distributed in actual pig farms, which obstructs the robots' movement and complicates the rapid determination of optimal solutions. To address these issues, this study introduces the concept of interaction among cellular automaton cell neighborhoods and proposes the Cellular Automata Slime Mold Algorithm (CASMA). This enhanced slime mold algorithm accelerates convergence speed and improves search accuracy. To validate its effectiveness, CASMA was compared with four metaheuristic algorithms (ACO, FA, PSO, and WPA) through performance tests and simulated experiments. Results demonstrate that in complex pigsty environments with varying numbers of pigs, CASMA reduces average step consumption by 8.03%, 1.61%, 0.99%, and 4.26% compared with these algorithms and saves processing time by averages of 13.20%, 20.11%, 10.86%, and 6.4%, respectively. In addition, in dynamic obstacle experiments, CASMA achieved average time savings of 48.27% and 56.28% compared with A* and TS, respectively, while reducing step consumption. Overall, CASMA enhances the efficiency of manure-cleaning robots in pig farms, thereby improving animal welfare.","PeriodicalId":7890,"journal":{"name":"Animal Science Journal","volume":"95 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2024-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142276527","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

Maternal genetic phylogeography analysis of Kyrgyz native cattle 吉尔吉斯本地牛的母系遗传系谱分析

IF 1.7 3区农林科学

Animal Science Journal Pub Date : 2024-09-22 DOI: 10.1111/asj.13999

Ayin, Ryo Masuko, Naho Kakutani, Fuki Kawaguchi, Shinji Sasazaki, Sanjar Sultankulov, Asankadyr Zhunushov, Masahide Nishibori, Takahiro Yonezawa, Hideyuki Mannen

{"title":"Maternal genetic phylogeography analysis of Kyrgyz native cattle","authors":"Ayin, Ryo Masuko, Naho Kakutani, Fuki Kawaguchi, Shinji Sasazaki, Sanjar Sultankulov, Asankadyr Zhunushov, Masahide Nishibori, Takahiro Yonezawa, Hideyuki Mannen","doi":"10.1111/asj.13999","DOIUrl":"https://doi.org/10.1111/asj.13999","url":null,"abstract":"This study presents the first mitochondrial DNA analysis of native cattle in Kyrgyzstan, examining sequences from the D-loop region of 20 Kyrgyz native cattle. A phylogenetic tree was constructed to estimate the genetic diversity and lineages, revealing two major haplogroups (T and I). Regional analysis showed a significant frequency difference (p < 0.05) between these haplogroups: Haplogroup I was found to be more prevalent (0.556) in the lower elevation areas (elevation ~1000 m) and less prevalent (0.100) in the higher elevations (elevation ~2500 to 3000 m), suggesting that environmental factors influence genetic distribution among Kyrgyz cattle. Three sub-haplogroups T2, T3, and T4 were observed within major haplogroup T, whereas only one sub-haplogroup (I1) was observed in this study. We also compared the distribution patterns of haplogroups T and I in Kyrgyz with those of some areas in Asia previously reported and found that in Central and Northeast Asia, haplogroup T was dominant, but the gene flow of haplogroup I was also present. The results of this study underscore the importance of regional environmental factors, including altitude, in shaping the genetic structure of livestock populations and would be useful to understand the historical movements and adaptations of Kyrgyz native cattle.","PeriodicalId":7890,"journal":{"name":"Animal Science Journal","volume":"95 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2024-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142276529","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