Genetic variation in component traits of heading date in Hordeum vulgare subsp spontaneum accessions characterized in controlled environments
Genetic variation in component traits of heading date in Hordeum vulgare subsp spontaneum accessions characterized in controlled environments
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DOI：
10.2135/cropsci2004.1622
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发表时间：
2004-09-01
期刊：
影响因子：
2.3
通讯作者：
Sato, K
中科院分区：
文献类型：
--
作者：
Karsai, I;Hayes, PM;Sato, K
祖先种质可能是作物改良的一个有用的遗传变异来源。有助于抽穗期的发育性状的遗传变异可能有助于开发独特适应特定胁迫环境的品种。大麦密生K. Koch）A.大麦是栽培大麦的祖先，在驯化过程中可能丢失了有用的发育性状等位基因。因此，我们调查了16个subsp的样本。割手密材料的春化要求、光周期敏感性、光周期反应和相对早熟性。我们比较了subsp。spontaneum对4个H. vulgare L.亚种vulgare加入代表春季，兼性和冬季生长习性。十三分之一。spontaneum加入起源于肥沃的新月和一个subsp.来自高加索地区的spontaneum加入需要春化;他们响应长光周期，大多数是非常早。两个subsp.来自喜马拉雅地区的密地密没有春化要求，但对短光周期极为敏感。我们使用聚类程序来定义两组subsp。spontaneum加入，一组subsp. spontaneum包括两个subsp. vulgare加入春天和兼性生长的习惯，和第四组包括两个subsp. vulgare冬性品种。这些数据表明，subsp。密生植物可能是生长习性新等位基因的来源。
Ancestral germplasm may be a useful source of genetic variation for crop improvement. Genetic variation in developmental traits that contribute to heading date may be useful in developing varieties that are uniquely tailored to specific stress environments. Hordeum vulgare subsp. spontaneum (K. Koch) A. & Gr. is the ancestor of cultivated barley and useful developmental trait alleles may have been lost in the domestication process. Accordingly, we surveyed a sample of 16 subsp. spontaneum accessions for vernalization requirement, photoperiod sensitivity, photoperiod response, and relative earliness. We compared the subsp. spontaneum accessions to four H. vulgare L. subsp. vulgare accessions representing spring, facultative, and winter growth habit. Thirteen subsp. spontaneum accessions originating from the Fertile Crescent and the one subsp. spontaneum accession from the Caucasus region required vernalization; they were responsive to long photoperiods and most were very early. Two subsp. spontaneum accessions from the Himalayan region had no vernalization requirement but were extremely sensitive to short photoperiods. We used a clustering procedure to define two groups of subsp. spontaneum accessions, a group of subsp. spontaneum that included the two subsp. vulgare accessions of spring and facultative growth habit, and a fourth group comprised of the two subsp. vulgare winter habit cultivars. These data indicate that subsp. spontaneum may be a source of novel alleles for growth habit.