Association Mapping Identifies QTLS on Wheat Chromosome 3A for Yield Related Traits
Association Mapping Identifies QTLS on Wheat Chromosome 3A for Yield Related Traits
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DOI：
10.1556/crc.2013.0061
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发表时间：
2014-06-01
影响因子：
1.6
通讯作者：
Khan, I. A.
中科院分区：
文献类型：
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作者：
Sajjad, M.;Khan, S. H.;Khan, I. A.
利用94份不同种类的六倍体小麦材料，定位了3A染色体上产量相关性状的数量性状位点。利用所有21条染色体的非连锁SSR标记估计群体结构和亲缘关系。方差分析显示各品种间差异显著；然而，基因型x年互作对大多数产量相关性状不显著。混合线性模型（MLM）方法鉴定出4个性状的6个qtl，分别占表型变异的10.7 ~ 17.3%。在两个研究年份中，所有qtl都被一致地观察到。鉴定出了每穗最大可育小花数和穗长新的qtl。这篇关于3A染色体上产量相关性状qtl的报道将会扩展现有的知识，并可能在高产品种的标记辅助选择（marker assisted selection， MAS）中发挥作用。
A panel of 94 diverse hexaploid wheat accessions was used to map quantitative trait loci (QTL) underlying the yield related traits on chromosome 3A. Population structure and kinships were estimated using unlinked SSR markers from all 21 chromosomes. Analysis of variance revealed significant difference among accessions; however, genotype x year interaction was non-significant for majority of yield related traits. A mixed linear model (MLM) approach identified six QTLs for four traits that individually accounted for 10.7 to 17.3% phenotypic variability. All QTLs were consistently observed for both study years. New putative QTLs for the maximum fertile florets per spike and spike length were identified. This report on QTLs for yield related traits on chromosome 3A will extend the existing knowledge and may prove useful in marker-assisted selection (MAS) for development of high yielding cultivars.