Domestication quantitative trait loci in Triticum dicoccoides, the progenitor of wheat
Domestication quantitative trait loci in Triticum dicoccoides, the progenitor of wheat
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DOI：
10.1073/pnas.252763199
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发表时间：
2003-03-04
影响因子：
11.1
通讯作者：
Korol, A
中科院分区：
文献类型：
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作者：
Peng, JH;Ronin, Y;Korol, A
野生二粒小麦（Triticum dicoccoides）是现代四倍体和六倍体栽培小麦的祖先。我们的目标是绘制T.双子叶类。所研究的性状包括脆轴、抽穗期、株高、籽粒大小、产量和产量构成因素。我们的作图群体来自T. dicoccoides和硬粒小麦。检测到约70个驯化QTL效应，非随机分布在染色体之间和沿着分布。提出了7个驯化综合征因子，每个因子影响5-11个性状。我们展示了：（i）一些QTL的聚类和强效应;（ii）强驯化相关QTL与基因富集区的显著基因组关联;（iii）A基因组中QTL效应的意外优势。小麦的A基因组在驯化进化过程中可能比B基因组发挥了更重要的作用。在T.双子叶类可能有助于小麦和谷类的改良。
Wild emmer wheat, Triticum dicoccoides, is the progenitor of modern tetraploid and hexaploid cultivated wheats. Our objective was to map domestication-related quantitative trait loci (QTL) in T. dicoccoides. The studied traits include brittle rachis, heading date, plant height, grain size, yield, and yield components. Our mapping population was derived from a cross between T. dicoccoides and Triticum durum. Approximately 70 domestication QTL effects were detected, nonrandomly distributed among and along chromosomes. Seven domestication syndrome factors were proposed, each affecting 5-11 traits. We showed: (i) clustering and strong effects of some QTLs; (ii) remarkable genomic association of strong domestication-related QTLs with gene-rich regions; and (iii) unexpected predominance of QTL effects in the A genome. The A genome of wheat may have played a more important role than the B genome during domestication evolution. The cryptic beneficial alleles at specific QTLs derived from T. dicoccoides may contribute to wheat and cereal improvement.