小麦种子大小和种子休眠相关等位基因的选择拮抗作用

IF 10.1 1区 生物学 Q1 BIOTECHNOLOGY & APPLIED MICROBIOLOGY
Feilong Guo, Changbin Yin, Tian Li, Sitong Liu, Jiayu Dong, Hao Jiang, Yu Fang, Jun Wei, Yi Han, Yu Li, Hong Cao, Yuting Ning, Galal Khamis, Xin Deng, Ke Wang, Jirui Wang, Cuijun Zhang, Fei Lu, Yongxiu Liu
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引用次数: 0

摘要

种子休眠和大小是影响作物产量的两个关键性状,在谷物驯化和改良过程中经历了强烈的选择。然而,种子休眠和种子大小之间拮抗作用的遗传基础仍然知之甚少。基于全基因组关联研究,我们对全球545份小麦材料进行了全面的比较分析,以剖析这两个性状在小麦改良过程中的遗传结构。我们发现种子休眠有利等位基因的积累与种子大小有利等位基因的积累之间存在很强的负相关。在小麦基因组水平上,一组含有拮抗等位基因的snp分别解释了种子休眠和种子大小表型变异的26.56%和47.21%。相比之下,一组具有协同等位基因的snp仅占这两个性状变异的0.54%和1.12%。在小麦育种改良过程中,与种子大小增加相关的有利等位基因被优先选择,从而导致种子休眠的妥协。在不同气候条件下,具有拮抗作用的多效基因的单倍型频率和协同位点通过平衡种子休眠和种子大小共同塑造小麦多样性。我们的研究结果揭示了小麦改良过程中随着种子大小的增加而观察到的种子休眠减弱的遗传结构,从而使进一步的基因组信息育种能够平衡和改善种子休眠和种子大小性状。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Antagonistic effects of selection on alleles associated with seed size and seed dormancy in wheat
Seed dormancy and size are two crucial traits influencing crop yield, and they have undergone strong selection during cereal domestication and improvement. However, the genetic basis underlying the antagonistic effects between seed dormancy and seed size remains poorly understood. Based on genome-wide association study, we perform a comprehensive comparative analysis of 545 global wheat accessions to dissect the genetic architecture of these two traits during wheat improvement. We detect a strong negative correlation between the accumulation of favorable alleles for seed dormancy and the accumulation of favorable alleles for seed size. At the wheat genome level, a set of SNPs harboring antagonistic alleles explain up to 26.56% and 47.21% of the phenotypic variation for seed dormancy and seed size, respectively. In contrast, a set of SNPs with synergistic alleles account for only 0.54% and 1.12% of the variation in both traits. During wheat breeding improvement, favorable alleles associated with increased seed size are preferentially selected, resulting in a compromise in seed dormancy. Under different climate conditions, the frequencies of haplotypes of the pleiotropic genes with antagonistic effects and synergistic loci collectively shape wheat diversity through balancing seed dormancy and seed size. Our findings reveal the genetic architecture underlying the observed weakening of seed dormancy as seed size increases during wheat improvement, enabling further genome-informed cultivar breeding to balance and improve seed dormancy and seed size traits.
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来源期刊
Genome Biology
Genome Biology Biochemistry, Genetics and Molecular Biology-Genetics
CiteScore
21.00
自引率
3.30%
发文量
241
审稿时长
2 months
期刊介绍: Genome Biology stands as a premier platform for exceptional research across all domains of biology and biomedicine, explored through a genomic and post-genomic lens. With an impressive impact factor of 12.3 (2022),* the journal secures its position as the 3rd-ranked research journal in the Genetics and Heredity category and the 2nd-ranked research journal in the Biotechnology and Applied Microbiology category by Thomson Reuters. Notably, Genome Biology holds the distinction of being the highest-ranked open-access journal in this category. Our dedicated team of highly trained in-house Editors collaborates closely with our esteemed Editorial Board of international experts, ensuring the journal remains on the forefront of scientific advances and community standards. Regular engagement with researchers at conferences and institute visits underscores our commitment to staying abreast of the latest developments in the field.
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