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Characterization and distribution of novel alleles of the vernalization gene Vrn-A1 in Chinese wheat(Triticum aestivum L.) cultivars

引用

The Crop Journal 2023年第3期11卷 852-862页

作者： Bo Zhang Yangyang Guo Qiru Fan Ruibo Li Dongsheng Chen Xiaoke Zhang College of Agronomy Northwest A&F UniversityYangling 712100ShaanxiChina The Crop Research Institute Ningxia Academy of Agriculture and Forestry ScienceYinchuan 750002NingxiaChina

The ability of wheat to adapt to a wide range of environmental conditions is determined mostly by allelic diversity among genes regulating vernalization ***-1 is a major regulator of this *** this study,two novel alleles of Vrn-A1 were discovered in Chinese cultivars:vrn-A1n was identified in two landraces,Jiunong 2 and Ganchun 16,and Vrn-A1o was detected in *** novel alleles showed a linked duplication in the promoter *** common copy of these two alleles was identical to the recessive allele *** with the recessive allele vrn-A1,the other copy of vrn-A1n contained a 54-bp deletion in the promoter region and the distinct copy of Vrn-A1o contained an11-bp deletion in the promoter *** segregating populations in the greenhouse under nonvernalizing(20–25°C)and long-day(16 h light)conditions,plants with the novel vrn-A1n allele did not head earlier than those with the recessive vrn-A1 ***,plants that were either homozygous or heterozygous for the novel Vrn-A1o allele headed earlier than those with the recessive vrn-A1 *** identify the novel allele with the small-sized product and facilitate screening,a DNA marker for the novel dominant allele Vrn-A1o was *** of the novel-allele distribution showed that two cultivars carrying the vrn-A1n allele were dispersed in the northwestern spring wheat zone,and 12 cultivars carrying the dominant Vrn-A1o allele were widely distributed in the northwestern spring wheat zone,Xinjiang winter and spring wheat zone,Yellow and Huai River valley winter wheat zone,and QinghaiTibetan Plateau spring and winter wheat *** study identifies useful germplasm and a DNA marker for wheat breeding.

关键词： Common wheat vernalization genes Novel alleles DNA marker Heading time

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