Mapping QTLs controlling grain yield and its components on chromosome 5A of wheat
Mapping QTLs controlling grain yield and its components on chromosome 5A of wheat
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DOI：
10.1007/s001220051587
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发表时间：
2000-11-01
影响因子：
5.4
通讯作者：
Sawada, S
中科院分区：
文献类型：
--
作者：
Kato, K;Miura, H;Sawada, S
已知小麦的5A染色体携带许多影响适应性和生产力的基因。利用中国春(Cappelle-Desprez 5A)和中国春(Triticum Spelta 5A)F-1代获得的118个单染色体重组系，构建了中国春(Cappelle-Desprez 5A)和中国春(Triticum Spelta 5A)单染色体重组系的RFLP图谱。该地图与3年来的现场试验数据相结合。5A染色体上共有5个区域对产量性状有影响。产量、50粒重和每穗颖花数的增加是由两亲本互补的QTL等位基因决定的。与春化需求基因VRN-A1或紧密连锁的QTL相关的效应只有在开花较晚的Cappelle-Desprez 5A的VRN-A1等位基因产生较高的分蘖数/株和每穗小穗数的有利生长季节才显著。检测了穗部形态基因Q和紧密连锁QTL(S)对产量和穗粒重的影响。另外3个效应较小的QTL分布在5A染色体上。由于显著反应大小的变化，这些QTL与年份有很大的交互作用。然而，来自T.spelta的等位基因赋予了更高的产量表现。
Chromosome 5A of wheat is known to carry a number of genes affecting adaptability and productivity. To localize quantitative trait loci (QTLs) controlling grain yield and its components, an RFLP map was constructed from 118 single-chromosome recombinant lines derived from the F-1 between Chinese Spring (Cappelle-Desprez 5A) and Chinese Spring (Triticum spelta 5A). The map was combined with the field-trial data scored over 3 years. A total of five regions in chromosome 5A contributed effects on yield traits. Increases in grain yield, 50-grain weight and spikelet number/ear were determined by complementary QTL alleles from both parents. The effects associated with the vernalization requirement gene Vrn-A1 or a closely linked QTL were significant only in the favorable growing season where the later-flowering vrn-A1 allele from Cappelle-Desprez 5A produced a higher tiller number/plant and spikelet number/ear. The effects of the ear morphology gene q or closely linked QTL(s) were detected for grain yield and ear grain weight. Three other QTLs with minor effects were dispersed along chromosome 5A. These QTLs had large interactions with years due to changes in the magnitude of the significant response. The alleles from T. spelta, however, conferred a higher yield performance.