Crop Science最新文献_第7页

Identifying chickpea genotypes with stable phosphorus acquisition across environments 鉴定不同环境下磷获取稳定的鹰嘴豆基因型

IF 2.4 3区农林科学

Crop Science Pub Date : 2026-07-19 DOI: 10.1002/csc2.70338

L. Ramchander, R. Sadhukhan, A. Sreenivas, P. Venkatesh, S. Dewanjee, N. Saha

{"title":"Identifying chickpea genotypes with stable phosphorus acquisition across environments","authors":"L. Ramchander, R. Sadhukhan, A. Sreenivas, P. Venkatesh, S. Dewanjee, N. Saha","doi":"10.1002/csc2.70338","DOIUrl":"10.1002/csc2.70338","url":null,"abstract":"Genotype × environment interaction (GEI) complicates the identification of chickpea genotypes with consistent nutrient acquisition across variable environments, particularly under phosphorus-deficient conditions. While stability analyses in chickpea have focused largely on yield, the stability of nutrient-related traits remains poorly explored. In this study, 104 chickpea (Cicer arietinum L.) genotypes were evaluated across four environments representing two locations and two cropping seasons in eastern India to identify genotypes combining high and stable shoot phosphorus concentration. Multi-environment trials were conducted using an augmented randomized complete block design, and genotype performance was assessed using genotype and genotype × environment biplot analysis. The first two interaction principal components explained 88.03% of the total G + GE variation, allowing reliable discrimination of genotypes based on mean performance and stability. Genotype JG11 was identified as the most desirable, combining high shoot phosphorus concentration with minimal GEI, followed by IPC201170 and AGBL184. Environment-focused analysis identified Kalyani (2018–2019) as the most representative and discriminating test environment. Shoot phosphorus concentration was positively associated with seed yield per plant, and the trait showed high broad-sense heritability across the tested environments. These results demonstrate the value of integrating nutrient acquisition, yield association, and heritability estimates with stability analysis to support the selection of promising chickpea genotypes across the tested heterogeneous and low-input production environments.","PeriodicalId":10849,"journal":{"name":"Crop Science","volume":"66 4","pages":""},"PeriodicalIF":2.4,"publicationDate":"2026-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148498913","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

Some objective functions and ideas to optimize experimental designs in artificial selection programs 人工选择程序中优化实验设计的一些目标函数和思路

IF 2.4 3区农林科学

Crop Science Pub Date : 2026-07-16 DOI: 10.1002/csc2.70337

Alexandre Colmant, Fabiano Pita, Giovanny Covarrubias-Pazaran

{"title":"Some objective functions and ideas to optimize experimental designs in artificial selection programs","authors":"Alexandre Colmant, Fabiano Pita, Giovanny Covarrubias-Pazaran","doi":"10.1002/csc2.70337","DOIUrl":"10.1002/csc2.70337","url":null,"abstract":"Experimental designs in artificial selection programs must balance limited resources with the need for accurate genetic evaluation across diverse environments. We propose a decision-point framework that decomposes the overall design process into sequential allocation steps, each optimized using objective functions based on representativeness. Using stochastic simulations, we evaluated how these objective functions influence accuracy and genetic gain across multiple design decisions. Key results emerged. First, the selection of a sufficiently large and representative set of environments had the greatest impact on across target population of environments (TPEs) accuracy. When the TPE was complex, sparse-testing strategies consistently outperformed fully balanced designs, even when total plot numbers were held constant. Second, environment selection using a modified optimal-contribution function (−q′Dq) outperformed random sampling, k-means, and hierarchical clustering, yielding up to a 20% gain in accuracy and reduced uncertainty. Third, once environments were fixed, the allocation of entries across environments had a moderate but meaningful effect, especially when genetic correlations varied widely across the TPE. Fourth, within-environment design decisions strongly influenced accuracy: optimal field size depended on the level of spatial heterogeneity, while replication had relatively limited impact when genomic relationship matrices were used. Finally, optimized spatial allocation improved accuracy under strong spatial noise, though at increased computational cost. Overall, this framework confirms prior findings while offering a practical and computationally efficient approach for optimizing phenotypic evaluations. By tailoring objective functions to specific decision points, breeding programs can improve accuracy, reduce risk, and make better use of limited resources.","PeriodicalId":10849,"journal":{"name":"Crop Science","volume":"66 4","pages":""},"PeriodicalIF":2.4,"publicationDate":"2026-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/csc2.70337","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148459647","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

Evaluation of disease resistance in intermediate wheatgrass and genome-wide association for fusarium head blight-related traits 中间麦草的抗病性评价及赤霉病相关性状的全基因组关联

IF 2.4 3区农林科学

Crop Science Pub Date : 2026-07-15 DOI: 10.1002/csc2.70316

Leah K. Treffer, Jared Crain, Steve R. Larson, Yvonne A. Thompson, M. Kathryn Turner

{"title":"Evaluation of disease resistance in intermediate wheatgrass and genome-wide association for fusarium head blight-related traits","authors":"Leah K. Treffer, Jared Crain, Steve R. Larson, Yvonne A. Thompson, M. Kathryn Turner","doi":"10.1002/csc2.70316","DOIUrl":"10.1002/csc2.70316","url":null,"abstract":"Intermediate wheatgrass (IWG) [Thinopyrum intermedium (Host) Barkworth & D. R. Dewey] is a promising perennial grain candidate that The Land Institute has been directly domesticating since 2001. Grain from improved IWG can be sold under the trademark Kernza. Resistance to Fusarium head blight (FHB) is a high priority trait to reduce toxin content of the grain and protect the value and seed supply of Kernza. We evaluated two breeding cycles of IWG from 2018 to 2022 with each cycle containing ∼500 unique genets to investigate disease response and identify chromosomal regions associated with disease resistance. Quantitative trait loci were mapped for 17 different traits using 32,067 markers in 21 linkage groups with genome-wide association analysis. A total of 188 unique marker-trait associations were detected across 14 different traits with five of these traits related to FHB resistance. We additionally used the basic local alignment search tool alignment creation tool to identify homologies between the Fhb1 region of wheat and the IWG genome, including an IWG GDSL-like lipase/Acylhydrolase gene (Thintv31194873.m.g) with similarity (query = 89%) to the Triticum aestivum Sumai 3 Fhb1 genomic sequence. Other candidate genes outside of the Fhb1 region were identified for Fusarium resistance with functions associated with toxin reduction and defense hormones and metabolites. These results provide loci that could be used in future selections to improve IWG's genetic resistance to FHB.","PeriodicalId":10849,"journal":{"name":"Crop Science","volume":"66 4","pages":""},"PeriodicalIF":2.4,"publicationDate":"2026-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/csc2.70316","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148459648","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

Genetic gains in grain yield and harvest index over a decade in maize hybrids in India 十多年来，印度玉米杂交品种在粮食产量和收获指数方面的遗传收益

IF 2.4 3区农林科学

Crop Science Pub Date : 2026-07-13 DOI: 10.1002/csc2.70335

Mukesh Choudhary, C. M. Parihar, Bhupender Kumar, S. L. Jat, Deep Mohan Mahala, Pardeep Kumar, Hanuman Sahay Jat, O. P. Yadav

{"title":"Genetic gains in grain yield and harvest index over a decade in maize hybrids in India","authors":"Mukesh Choudhary, C. M. Parihar, Bhupender Kumar, S. L. Jat, Deep Mohan Mahala, Pardeep Kumar, Hanuman Sahay Jat, O. P. Yadav","doi":"10.1002/csc2.70335","DOIUrl":"10.1002/csc2.70335","url":null,"abstract":"Maize (Zea mays L.) is a major cereal crop globally, and its productivity has significantly improved over the decades due to the adoption of single-cross hybrids and targeted breeding strategies. This study is the first in India to quantify genetic gains in maize over time by evaluating hybrids released between 2005 and 2014 from both public and private sectors. Thirty maize hybrids were tested for grain yield (GY) and harvest index (HI) across multiple seasons. The results showed significantly modest genetic improvements for GY and HI, with newer/modern hybrids outperforming older ones. Annual genetic gains were estimated at 1.3% for GY (56.34 kg ha−1 year−1) and 1.02% for HI (0.004 units year−1). GY was closely correlated with HI, indicating simultaneous improvement and correlated response in yield and HI gains. While private-sector hybrids performed slightly better, public-sector hybrids remained competitive. Overall, the findings highlight the success of India's maize breeding efforts and point to the importance of selecting for GY and HI to achieve further progress. This work lays a strong foundation for developing the next generation of high-yielding maize hybrids.","PeriodicalId":10849,"journal":{"name":"Crop Science","volume":"66 4","pages":""},"PeriodicalIF":2.4,"publicationDate":"2026-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148459650","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

Genome-wide association study of yield-component traits in US upland cotton (Gossypium hirsutum L.) 美国陆地棉产量组成性状的全基因组关联研究

IF 2.4 3区农林科学

Crop Science Pub Date : 2026-07-13 DOI: 10.1002/csc2.70334

Rakesh J. L. Gowda, S. Anjan Gowda, Hui Fang, Fred M. Bourland, B. Todd Campbell, Michael A. Gore, Jane Dever, Jinfa Zhang, Don C. Jones, Vasu Kuraparthy

{"title":"Genome-wide association study of yield-component traits in US upland cotton (Gossypium hirsutum L.)","authors":"Rakesh J. L. Gowda, S. Anjan Gowda, Hui Fang, Fred M. Bourland, B. Todd Campbell, Michael A. Gore, Jane Dever, Jinfa Zhang, Don C. Jones, Vasu Kuraparthy","doi":"10.1002/csc2.70334","DOIUrl":"10.1002/csc2.70334","url":null,"abstract":"Genetic improvement of cotton (Gossypium spp.) yield is challenged by the complex and polygenic nature of yield and its underlying component traits. In this study, an elite diversity panel of 348 upland cotton accessions, genotyped using the CottonSNP63K array, was evaluated across 10 environments in the US Cotton Belt for four yield-component traits: lint percent (LP: %), boll weight (BW: g), seed index (SI: g), and lint index (LI). All traits exhibited high broad-sense heritability (>60%), and all except for SI showed high genomic heritability. Positive correlations were observed among BW, SI, and LI, whereas SI was negatively correlated with LP. Genome-wide association study of the four traits identified 308 significant marker–trait associations (MTAs), including 80 stable MTAs distributed across 19 genomic regions, of which 15 are novel associations. These 19 genomic regions included MTAs detected in at least three environments and explained 7.23%–11.46% phenotypic variation. Notably, this study confirmed the pleiotropic region influencing SI and BW on chromosome D11 and identified a novel co-localized group on D12 associated with LP and LI. Haplotype analysis further revealed superior allele combinations associated with LP, showing a high trait value (LP: 39.77%). The genomic regions and favorable haplotypes identified in this study provide valuable resources for harnessing genetic diversity, accelerating targeted genetic improvement, and facilitating the gene discovery of yield traits in cotton.","PeriodicalId":10849,"journal":{"name":"Crop Science","volume":"66 4","pages":""},"PeriodicalIF":2.4,"publicationDate":"2026-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/csc2.70334","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148459649","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

Gibberellic acid application enhances seed yield, biomass, and plant growth in Kentucky bluegrass production 赤霉素的施用提高了肯塔基蓝草的种子产量、生物量和植株生长

IF 2.4 3区农林科学

Crop Science Pub Date : 2026-07-13 DOI: 10.1002/csc2.70333

Xin Xin, Jonathan E. Schnore, Anna K. Hulbert, Shahbaz Ahmed, Michael M. Neff

{"title":"Gibberellic acid application enhances seed yield, biomass, and plant growth in Kentucky bluegrass production","authors":"Xin Xin, Jonathan E. Schnore, Anna K. Hulbert, Shahbaz Ahmed, Michael M. Neff","doi":"10.1002/csc2.70333","DOIUrl":"10.1002/csc2.70333","url":null,"abstract":"Kentucky bluegrass (Poa pratensis L.) is a cool-season grass used for forage and turf with seed production occurring primarily in the Pacific Northwest region of the United States. Climate change in this region, characterized by warmer winters, threatens Kentucky bluegrass flowering and seed yield due to altered vernalization patterns. This 2-year field study investigated the effects of gibberellic acid (GA3), specifically RyzUp Smartgrass, on seed yield, biomass accumulation, and turf performance of the Kentucky bluegrass cultivar Midnight. Treatments included fall and spring applications with untreated control along with three GA3 doses (35, 70, and 140 g/ha) under three application schedules (early, late, and early + late). Seed yield significantly increased during the first-year fall applications, with the 35 g/ha early and late treatments improving yield by 116% and 100%, respectively. However, spring applications did not enhance seed yield, and high-dose treatments negatively impacted yield in the second spring. Biomass accumulation significantly improved, especially with spring GA3 applications. The highest biomass increase (144%) occurred with the 140 g/ha double spray in the first year. Instant biomass visual assessments 2 weeks post-application indicated rapid vegetative responses to GA3 across treatments. Additionally, spring GA3 treatments significantly increased plant height, row spreading, and visual turf color quality. No negative impacts on seed vigor, viability, or 1000-grain weight were observed. This study highlights GA3’s potential as an agronomic tool for enhancing Kentucky bluegrass seed yield and biomass, particularly when applied during the fall at lower doses and in spring for rapid turfgrass establishment and renovation.","PeriodicalId":10849,"journal":{"name":"Crop Science","volume":"66 4","pages":""},"PeriodicalIF":2.4,"publicationDate":"2026-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/csc2.70333","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148429110","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

Characterization of Dn11, a new Russian wheat aphid resistance gene in Iranian landrace PI 626575 伊朗地方小麦pi626575中俄罗斯小麦抗蚜新基因Dn11的鉴定

IF 2.4 3区农林科学

Crop Science Pub Date : 2026-07-10 DOI: 10.1002/csc2.70320

Xiangyang Xu, Genqiao Li, Tezera W. Wolabu, Kelly Chamberlin, Amy Bernardo, Katherine Jordan, Brett F. Carver, Yanqi Wu

{"title":"Characterization of Dn11, a new Russian wheat aphid resistance gene in Iranian landrace PI 626575","authors":"Xiangyang Xu, Genqiao Li, Tezera W. Wolabu, Kelly Chamberlin, Amy Bernardo, Katherine Jordan, Brett F. Carver, Yanqi Wu","doi":"10.1002/csc2.70320","DOIUrl":"10.1002/csc2.70320","url":null,"abstract":"Russian wheat aphid (RWA, Diuraphis noxia Kurdjumov) is a highly invasive and destructive wheat pest posing a threat to global wheat production, and host resistance is preferred for managing RWA because RWA can avoid insecticides by living inside rolled wheat leaves. However, RWA evolves quickly to overcome host resistance, necessitating continuous discovery of new resistance genes. PI 626575 is an Iranian landrace exhibiting resistance to RWA biotype 2 (RWA2), the dominant and most widely virulent RWA biotype in the United States. Evaluation of 131 F2:3 lines from cross PI 626575 × Jagalene for responses to RWA2 infestation indicated that a single gene, designated Dn11, confers RWA resistance in PI 626575. Genotyping of a subset of F2 plants from the same cross using genotyping by sequencing led to identification of over 10,000 single nucleotide polymorphisms (SNPs). Allele distribution analysis of SNPs in the genotyped F2 plants with contrasting phenotypes identified a set of SNPs associated with RWA resistance in the interval 401.7–578.8 Mb on chromosome arm 7DL. Linkage analysis using kompetitive allele-specific PCR (KASP) markers converted from SNPs in the target region delimited Dn11 to an interval of 11.96 Mb between 519.22 and 531.18 Mb. Dn11 was 1.6 cM distal to Stars-KASP1043 and 2.4 cM proximal to Stars-KASP1046. A test of allelism indicated that Dn11 is a novel RWA resistance gene with loose linkage to Dn10, previously mapped to chromosome arm 7DL. Estimated recombination frequency and genetic distance between Dn11 and Dn10 were 15.5 ± 0.6% and 16.04 ± 0.67 cM, respectively. Some KASP markers flanking Dn11 can be used to trace Dn11 in wheat breeding.","PeriodicalId":10849,"journal":{"name":"Crop Science","volume":"66 4","pages":""},"PeriodicalIF":2.4,"publicationDate":"2026-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148414711","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

Thirty years of breeding for Fusarium head blight resistance in wheat: A success story 小麦抗枯萎病育种30年：一个成功的故事

IF 2.4 3区农林科学

Crop Science Pub Date : 2026-07-10 DOI: 10.1002/csc2.70319

Charlotte Brault, Emily J. Conley, Andrew C. Read, Harsimardeep S. Gill, Sarah Blecha, Andrew J. Green, Karl D. Glover, Jason P. Cook, Ruth Dill-Macky, Jason D. Fiedler, James A. Anderson

{"title":"Thirty years of breeding for Fusarium head blight resistance in wheat: A success story","authors":"Charlotte Brault, Emily J. Conley, Andrew C. Read, Harsimardeep S. Gill, Sarah Blecha, Andrew J. Green, Karl D. Glover, Jason P. Cook, Ruth Dill-Macky, Jason D. Fiedler, James A. Anderson","doi":"10.1002/csc2.70319","DOIUrl":"10.1002/csc2.70319","url":null,"abstract":"Fusarium head blight (FHB or scab) is a devastating disease affecting wheat (Triticum aestivum L.) worldwide. In the US Northern Great Plains growing region, breeding programs began focusing on disease resistance in the 1990s as FHB became a major concern for the growers. Harnessing public data from two spring wheat nurseries, this study assesses the rate of genetic improvement for FHB resistance, examines the frequency of major FHB quantitative trait loci (QTLs), and evaluates their effect on a set of FHB-related and agronomic traits. The uniform regional nursery (URN) is a long-running trial used to test variety release candidates with good agronomic qualities, while the uniform regional scab nursery (URSN) is used to facilitate the phenotyping of FHB resistance and exchange germplasm among the cooperating breeding programs. We show that FHB resistance has increased significantly over the years, with a higher rate for the initially more susceptible URN materials. For example, the average disease index has decreased by 22% over the last 30 years. The frequency of the resistance QTLs Fhb1, Fhb5, and Fhb5AS has increased over time, with a higher frequency in URSN materials. Each of the resistance QTL alleles was significantly associated with increased FHB resistance, with up to an 18% decrease for the deoxynivalenol trait associated with Fhb5. There was no detrimental association between the presence of resistance alleles and important agronomic traits. This work illustrates progress achieved through breeding to provide growers wheat genotypes with improved FHB resistance.","PeriodicalId":10849,"journal":{"name":"Crop Science","volume":"66 4","pages":""},"PeriodicalIF":2.4,"publicationDate":"2026-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/csc2.70319","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148415179","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

Surveys and satellites: Evaluating crop condition monitoring strategies using field observations and vegetation health indices 调查和卫星：利用实地观测和植被健康指数评价作物状况监测战略

IF 2.4 3区农林科学

Crop Science Pub Date : 2026-06-30 DOI: 10.1002/csc2.70323

Logan R. Bundy, Vittorio A. Gensini, Walker S. Ashley, Alex M. Haberlie, David Changnon

{"title":"Surveys and satellites: Evaluating crop condition monitoring strategies using field observations and vegetation health indices","authors":"Logan R. Bundy, Vittorio A. Gensini, Walker S. Ashley, Alex M. Haberlie, David Changnon","doi":"10.1002/csc2.70323","DOIUrl":"https://doi.org/10.1002/csc2.70323","url":null,"abstract":"The ability to make reliable, data-driven crop yield assessments for risk management depends on the quality of the underlying data. This study compares US state- and national-level data from 1986 through 2023 for 10 major field crops using two widely applied approaches: the USDA survey-based crop condition index (CCIndex) and satellite-derived vegetation health (VH) indices. The goals are to characterize seasonal tendencies, quantify yield variance, and examine responses to climatic anomalies using both crop monitoring systems. Results indicate that the onset of natural senescence during the reproductive stage marks a critical turning point, as weekly VH indices correlate significantly with yield in the early to mid-season but lose predictive skill as canopy greenness diminishes; conversely, the CCIndex maintains or even strengthens its yield association through the late season across most crops. Climate-response analyses reveal that CCIndex ratings adequately capture the nonlinear effects of precipitation and temperatures, whereas VH response is weaker. Collectively, findings support a phenology-aware blended monitoring strategy—leveraging VH indices for early detection and the CCIndex for late-season yield relevance and agronomic nuance. This multi-decadal, multi-crop evaluation establishes a robust baseline for operational crop-condition predictability and highlights opportunities to fuse survey and remote-sensing data to enhance yield forecasting and climate resilience.","PeriodicalId":10849,"journal":{"name":"Crop Science","volume":"66 4","pages":""},"PeriodicalIF":2.4,"publicationDate":"2026-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148343351","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

Rust resistance in barley accessions County and BHS248 大麦品种和BHS248的抗锈病性

IF 2.4 3区农林科学

Crop Science Pub Date : 2026-06-30 DOI: 10.1002/csc2.70318

Kelly Jordaan, Willem H. P. Boshoff, Oadi Matny, Daniël de Klerk, Brian J. Steffenson, Wilku B. Meyer, Zakkie A. Pretorius, Renée Prins

{"title":"Rust resistance in barley accessions County and BHS248","authors":"Kelly Jordaan, Willem H. P. Boshoff, Oadi Matny, Daniël de Klerk, Brian J. Steffenson, Wilku B. Meyer, Zakkie A. Pretorius, Renée Prins","doi":"10.1002/csc2.70318","DOIUrl":"https://doi.org/10.1002/csc2.70318","url":null,"abstract":"Rusts can cause devastating losses of barley (Hordeum vulgare L.) in epidemic years. Several reactions to Puccinia hordei (Rph) genes/quantitative trait loci (QTLs) for resistance to barley leaf rust (BLR) have been documented. In contrast, there is a dearth of characterized resistance sources against stem rust (SR) caused by Puccinia graminis. This study aimed to genetically characterize novel and known SR and BLR loci in the resistant barley accessions County and BHS248. To achieve this, two recombinant inbred line (RIL) populations (n = 200) were developed using Hiproly as a rust-susceptible parent. QTL mapping was performed utilizing genotypic data predominantly generated on the barley 50k iSelect single-nucleotide polymorphism array and phenotypic results from multi-year trials in South Africa and USA. A major QTL on chromosome 4H (QPgt.cg-4_CH) for adult plant resistance (APR) to SR race PTKST explained up to 18.2% variation. Another major QTL on 5H (designated QPgt.cg-5_CH), also effective to PTKST, is likely RPG-qtl-5H-11_11355. The APR gene Rph20 (herein named QPh.cg-5.1_CH) and all-stage resistance gene Rph27 (designated QPh.cg-4_BH) mapped to 5H and 4H, respectively. For BLR, major effect APR QTLs were identified on 2H and 6H in both populations. Published markers were used to assess if the 6H resistance was contributed by Rph24, but the latter locus did not map to 6H. Kompetitive allele specific PCR assays were designed spanning most of the major QTL identified. These should be useful in tracking the introgression of rust resistance in local germplasm.","PeriodicalId":10849,"journal":{"name":"Crop Science","volume":"66 4","pages":""},"PeriodicalIF":2.4,"publicationDate":"2026-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/csc2.70318","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148343039","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