Winter Wheat Vernalization Alleles and Freezing Tolerance at the Seedling and Jointing Stages
文献类型： 外文期刊
作者： Liu, Fangfang 1 ; Cao, Wenxin 1 ; Zhang, Qiqi 1 ; Li, Yao 1 ; Zhou, Heng 1 ; Wan, Yingxiu 1 ;
作者机构： 1.Anhui Acad Agr Sci, Crop Res Inst, Hefei 230001, Peoples R China
2.Anhui Key Lab Crop Qual Improvement, Hefei 230031, Peoples R China
关键词： winter wheat; vernalization gene; freezing tolerance; seedling stage; jointing stage
期刊名称：PLANTS-BASEL （ 影响因子：4.1； 五年影响因子：4.5 ）
ISSN： 2223-7747
年卷期： 2025 年 14 卷 9 期
页码：
收录情况： SCI
摘要： This study explores the relationship between allelic variation of the vernalization genes (VRN) and the freezing tolerance at the seedling and jointing stages of winter wheat growth. It provides a basis for molecular marker development for freezing tolerance breeding of winter wheat. A total of 435 wheat accessions were used to identify and evaluate the freezing tolerance at the seedling stage using field tests, while 192 wheat accessions were used to evaluate the freezing tolerance at the jointing stage in climate chamber tests. The VRN genes of the wheat accessions were detected using allele-specific markers of the VRN-A1, VRN-B1, VRN-D1 and VRN-B3 loci, and the relationship between VRN genotype and freezing tolerance at the two developmental stages was tested. There were significant differences in freezing tolerance between the wheat accessions. Assessing the freezing tolerance of 52 wheat accessions at both the seedling and jointing stages revealed no significant correlation between tolerance at these two stages. The genotypic analysis found that Vrn-D1 was the most frequent dominant allele in winter wheat, while no accession contained the dominant alleles Vrn-A1 and Vrn-B3. Notably, freezing tolerance showed stage-specific genetic regulation; seedling-stage freezing tolerance strongly correlated with vernalization gene allelic combinations (p < 0.05), whereas jointing-stage freezing tolerance exhibited no such association. The presence of all recessive alleles vrn-A1, vrn-B1, vrn-D1 and vrn-B3 was required for strong seedling-stage freezing tolerance. The VRN-D1 marker was effective for screening freezing tolerance materials under the premise that vrn-A1 and vrn-B1 alleles are recessive at winter wheat seedling stage.
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