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Genetic mapping of a major QTL promoting homoeologous chromosome pairing in a wheat landrace

文献类型： 外文期刊

作者： Fan, Chaolan 1 ; Luo, Jiangtao 2 ; Zhang, Shujie 1 ; Liu, Meng 1 ; Li, Qingcheng 1 ; Li, Yazhou 1 ; Huang, Lei 1 ; Chen, 1 ;

作者机构： 1.Sichuan Agr Univ, Triticeae Res Inst, Chengdu Campus, Wenjiang 611130, Sichuan, Peoples R China

2.Sichuan Acad Agr Sci, Crop Res Inst, Chengdu 610066, Sichuan, Peoples R China

3.Sichuan Agr Univ, Joint Int Res Lab Crop Resources & Genet Improvem, Wenjiang 611130, Sichuan, Peoples R China

期刊名称：THEORETICAL AND APPLIED GENETICS （ 影响因子：5.699； 五年影响因子：5.565 ）

ISSN： 0040-5752

年卷期： 2019 年 132 卷 7 期

页码：

收录情况： SCI

摘要： Key messageCommon wheat landrace Kaixian-luohanmai carries a gene(s) that promotes homoeologous chromosome pairing. A major QTL responsible for this effect was mapped to chromosome arm 3AL.AbstractPolyhaploid hybrids of a Chinese common wheat landrace Kaixian-luohanmai (KL) and related species show increased levels of chromosome pairing. Over 90% of that pairing is between homoeologous arms of wheat chromosomes, with a very strong preference for pairing between homoeologs from genomes A and D. Wheat-rye pairing was also observed at low frequency. Two mapping populations were created from the hybrids of KL with two wheat genotypes top crossed to rye. Mean chiasmata numbers per plant were used as phenotypic data. Wheat 660K and 15K SNP arrays, DArT markers and SSR markers were used for genotyping of the top-cross ABDR hybrids. One major QTL, named QPh.sicau-3A, for increased homoeologous pairing was detected on chromosome arm 3AL, and it was responsible for ca. 16% of the total variation. This QTL was located in the interval 696-725Mb in the Chinese Spring reference genome. SNP markers closely linked with QPh.sicau-3A were converted to KASP markers and validated for marker-assisted selection.

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