数字农科院2.0

Uncovering a stable QTL qSRI.A06 and candidate gene for rapeseed pod shatter resistance

文献类型: 外文期刊

作者: Wenxiang Wang;Wen Chu;Hui Wang;Mei Han;Wei Wang;Hongtao Cheng;Desheng Mei;Qiong Hu;Taocui Huang;Jia Liu;Taocui Huang

作者机构:

关键词: Brassica napus;Candidate gene;Fine mapping;Pod shatter resistance;qSRI.A06

期刊名称: Molecular Breeding

ISSN: 1572-9788

年卷期: 2025 年 45 卷 9 期

页码:

收录情况: SCIE(2025版) ; ; EI(2025版)

摘要: Rapeseed pods are prone to dehiscence, resulting in yield loss at maturity. In the present study, we investigated the shatter resistance index (SRI) of 280 doubled haploid (DH) lines derived from a cross between ZS11 (susceptible line) and R11 (resistant line). Based on the phenotypic data obtained from four environments and a high-density genetic map, a significant QTL (qSRI.A06) for shatter resistance on A06 chromosome were stably detected. This locus explained 4.80% − 15.00% of the phenotypic variation and the peak position covered a 664 Kb region. The effect of qSRI.A06 was verified in BC3F2 and BC3F3 populations and delimited in a 90.8 Kb region comprising 11 genes. Out of these genes, a differencially expressed gene, BnaA06g27900D, was identified to be involved in cell wall development by comparative transcriptome analysis. Regional association revealed four SNP/Indel variations in the promoter associated with pod shattering resistance. The highest Indels A06-41975887 showed suggestive association with SRI (p = 8.80E-06) with a TG allele variation. The stable locus qSRI.A06 and the candidate gene BnaA06g27900D will be helpful for understanding the resistance mechanism and improving shatter resistance in rapeseed.

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