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- W4313447887 abstract "Abstract Spikelet number per spike (SNS)is an important target trait for improving wheat yield. Thus, the identification and verification of novel quantitative trait loci (QTL)/genes controlling SNS isessential for dissecting the underlying molecular basisand hence for grain yield improvement. In thisstudy, we constructed a high-density genetic map for the recombinant inbred line (RIL)population derived from Zhengnong 17 (ZN17) and Yangbaimai (YBM) using 99,031 single-nucleotide polymorphism (SNP) markers from the Wheat660K SNP array. Based on this genetic map, a total of 19 QTL associated with SNS were detected in nine environments. Among them, four QTL were identifiedin more than six environments, explaining the phenotypic variance ranging from 2.91% to 37.71%. Particularly, QSns.ucas-5B isprobably a novellocus, which islocated on chromosome arm 5BL flanking by the markers AX-110648717 and AX-109557107 , withexplained the phenotypic variation range from 5.09% to 7.26% in sixenvironments. A residual heterozygous line was developed for QSns.ucas-5B , and the SNSshowed 6.74~13.17% higher in lines of elite haplotype from ZN17 than that from YBM at four diverse environments, which implied the promising potential to improve SNS using this QTL. Simultaneously, the ZN17haplotype in QSns.ucas-5B has a consistent positive effect on grain number per spike and grain weight per spike. These results lay the foundation for the precise mappingand cloning of gene(s) underlying QSns.ucas-5B in the future. The developed and validated InDel marker of QSns.ucas-5B could be appliedin molecular breeding aiming to improve wheat grain yield." @default.
- W4313447887 created "2023-01-06" @default.
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- W4313447887 date "2022-12-20" @default.
- W4313447887 modified "2023-10-13" @default.
- W4313447887 title "Dissection and validation of a novel QTL controlling spikelet number on 5B in bread wheat" @default.
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- W4313447887 doi "https://doi.org/10.21203/rs.3.rs-2340320/v1" @default.
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