Analyzing Quantitative Trait Loci for Fiber Quality and Yield-Related Traits From a Recombinant Inbred Line Population With Gossypium hirsutum Race palmeri as One Parent.
Analyzing Quantitative Trait Loci for Fiber Quality and Yield-Related Traits From a Recombinant Inbred Line Population With Gossypium hirsutum Race palmeri as One Parent.
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分析以陆地棉小种棕榈为单亲的重组自交系群体的纤维质量和产量相关性状的数量性状位点
DOI：
10.3389/fpls.2021.817748
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发表时间：
2021
影响因子：
5.6
通讯作者：
Zhang Z
中科院分区：
文献类型：
--
作者：
Liu X;Yang L;Wang J;Wang Y;Guo Z;Li Q;Yang J;Wu Y;Chen L;Teng Z;Liu D;Liu D;Guo K;Zhang Z
纤维品质和产量相关性状是棉花育种的重要农艺性状。为探明棉花纤维品质和产量相关性状的遗传基础，以陆地棉品种中棉所35为母本，以棉花为父本，构建了由182个株系组成的重组自交系（RIL）群体。棕榈多毛菌种登录号TX-832。使用SLAF-seq对RIL群体进行深度基因分型，并在六种环境中进行表型分型。构建了一张包含15,765个SNP标记和153个SSR标记的高密度遗传连锁图，相邻标记间的平均距离为0.30 cM。共检测到210个纤维品质QTL和73个产量相关QTL。在检测到的QTL中，有62个纤维品质QTL和10个产量相关QTL在多个环境中保持稳定。在At和Dt亚基因组上分别检测到12个和20个QTL簇。通过关联分析进一步验证了23个主效QTL簇，并确定了4个稳定纤维品质QTL的5个候选基因。本研究揭示了影响棉纤维品质和产量的优良基因座，以及棉纤维品质和产量的重要表型选择区域。为分子标记辅助育种在棉花育种中的应用奠定了基础。
Fiber quality and yield-related traits are important agronomic traits in cotton breeding. To detect the genetic basis of fiber quality and yield related traits, a recombinant inbred line (RIL) population consisting of 182 lines was established from a cross between Gossypium hirsutum cultivar CCRI35 and G. hirsutum race palmeri accession TX-832. The RIL population was deeply genotyped using SLAF-seq and was phenotyped in six environments. A high-density genetic linkage map with 15,765 SNP markers and 153 SSR markers was constructed, with an average distance of 0.30 cM between adjacent markers. A total of 210 fiber quality quantitative trait loci (QTLs) and 73 yield-related QTLs were identified. Of the detected QTLs, 62 fiber quality QTLs and 10 yield-related QTLs were stable across multiple environments. Twelve and twenty QTL clusters were detected on the At and Dt subgenome, respectively. Twenty-three major QTL clusters were further validated through associated analysis and five candidate genes of four stable fiber quality QTLs were identified. This study revealed elite loci influencing fiber quality and yield and significant phenotypic selection regions during G. hirsutum domestication, and set a stage for future utilization of molecular marker assisted breeding in cotton breeding programs.
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