Discovery, evaluation and distribution of haplotypes of the wheat Ppd-D1 gene

文献类型： 外文期刊

第一作者： Guo, Zhiai

作者： Guo, Zhiai;Song, Yanxia;Zhou, Ronghua;Jia, Jizeng;Guo, Zhiai;Ren, Zhenglong

作者机构：

关键词： alleles;altitude;cultivars;gene expression;genes;genetic markers;genetic variation;haplotypes;latitude;transcription;wheat;wild relatives;Aegilops tauschii;Triticum;Triticum aestivum

期刊名称：NEW PHYTOLOGIST （ 影响因子：10.151； 五年影响因子：10.475 ）

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年卷期：

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收录情况： SCI

摘要： Ppd-D1 is one of the most potent genes affecting the photoperiod response of wheat (Triticum aestivum). Only two alleles, insensitive Ppd-D1a and sensitive Ppd-D1b, were known previously, and these did not adequately explain the broad adaptation of wheat to photoperiod variation. In this study, five diagnostic molecular markers were employed to identify Ppd-D1 haplotypes in 492 wheat varieties from diverse geographic locations and 55 accessions of Aegilops tauschii, the D genome donor species of wheat. Six Ppd-D1 haplotypes, designated I-VI, were identified. Types II, V and VI were considered to be more ancient and types I, III and IV were considered to be derived from type II. The transcript abundances of the Ppd-D1 haplotypes showed continuous variation, being highest for haplotype I, lowest for haplotype III, and correlating negatively with varietal differences in heading time. These haplotypes also significantly affected other agronomic traits. The distribution frequency of Ppd-D1 haplotypes showed partial correlations with both latitudes and altitudes of wheat cultivation regions. The evolution, expression and distribution of Ppd-D1 haplotypes were consistent evidentially with each other. What was regarded as a pair of alleles in the past can now be considered a series of alleles leading to continuous variation.

分类号： Q94

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