Genetic studies of seed longevity in hexaploid wheat using segregation and association mapping approaches
Genetic studies of seed longevity in hexaploid wheat using segregation and association mapping approaches
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DOI：
10.1007/s10681-011-0471-5
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发表时间：
2012-07-01
期刊：
影响因子：
1.9
通讯作者：
Boerner, A.
中科院分区：
文献类型：
--
作者：
Arif, M. A. Rehman;Nagel, M.;Boerner, A.
基因库的任务是储存、保存和分发作物种质资源。在这种情况下，种子寿命是一个重要的特征，但对其遗传基础知之甚少，很大程度上是因为它受到非遗传因素的强烈影响。在这里，我们提出了面包小麦种子寿命的遗传解剖结果。我们采用了基于双亲本杂交分离的标准数量性状位点分析和使用种质面板的关联分析来检测标记性状的相关性。后者比前者揭示了更多的基因座。已知已鉴定的一些基因组区域包含决定刺突结构或生物和非生物应激反应方面的基因。研究结果为谷物种质资源中有利长寿等位基因的鉴定和种子寿命的准确预测开辟了新的思路。
Genebanks are entrusted with the storage, preservation and distribution of crop germplasm. Seed longevity is an important character in this context, but little is known regarding its genetic basis, largely because it is so strongly influenced by non-genetic factors. Here we present the outcome of a genetic dissection of seed longevity in bread wheat. We applied both a standard quantitative trait locus analysis based on segregation from a biparental cross, and an association analysis using a germplasm panel to detect marker trait associations. The latter revealed more loci than the former. Some of the genomic regions identified are known to contain genes determining spike architecture or aspects of biotic and abiotic stress responses. The results open perspectives for identification of favourable longevity alleles and the more accurate prediction of seed longevity in cereal germplasm collections.