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Novel allelic variations in Tannin1 and Tannin2 contribute to tannin absence in sorghum

文献类型： 外文期刊

作者： Zhang, Wenbin 1 ; Benke, Ryan 3 ; Zhang, Xiao 1 ; Zhang, Huawen 2 ; Zhao, Cunyuan 1 ; Zhao, Yu 1 ; Xu, Ying 1 ; Wang, Hailian 2 ; Liu, Shubing 1 ; Li, Xianran 3 ; Wu, Yuye 1 ;

作者机构： 1.Shandong Agr Univ, Coll Life Sci, Natl Key Lab Wheat Improvement, Tai An 271018, Peoples R China

2.Shandong Acad Agr Sci, Crop Res Inst, Jinan 250100, Peoples R China

3.USDA ARS, Wheat Hlth Genet & Qual Res Unit, Pullman, WA 99164 USA

关键词： Sorghum; Tannin; Allelic variation; KASP assays

期刊名称：MOLECULAR BREEDING （ 影响因子：3.1； 五年影响因子：3.1 ）

ISSN： 1380-3743

年卷期： 2024 年 44 卷 3 期

页码：

收录情况： SCI

摘要： Sorghum is an important food crop commonly used for brewing, feed, and bioenergy. Certain genotypes of sorghum contain high concentrations of condensed tannins in seeds, which are beneficial, such as protecting grains from herbivore bird pests, but also impair grain quality and digestibility. Previously, we identified Tannin1 and Tannin2, each with three recessive causal alleles, regulate tannin absence in sorghum. In this study, via characterizing 421 sorghum accessions, we further identified three novel recessive alleles from these two genes. The tan1-d allele contains a 12-bp deletion at position 659 nt and the tan1-e allele contains a 10-bp deletion at position 771 nt in Tannin1. The tan2-d allele contains a C-to-T transition, which results in a premature stop codon before the bHLH domain in Tannin2, and was predominantly selected in China. We further developed KASP assays targeting these identified recessive alleles to efficiently genotype large populations. These studies provide new insights in sorghum domestication and convenient tools for breeding programs.

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