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在存在-缺席的变异中,两个互补的基因有助于在大米中印加-日本的生殖隔离

Daiqi Wang^1,2,3,4, Hongru Wang⁵, Xiaomei Xu¹

¹Guangdong Provincial Key Laboratory of Plant Molecular Breeding, College of Agriculture, South China Agricultural University, Guangzhou, Guangdong, 510642, China.

Nature communications

|July 28, 2023

概括

亚洲种植的大米中的基因变异导致印加和日本亚种之间的杂交不育. 这种存在-缺席的变化在Se locus解释了生殖隔离,并有助于杂交米育种.

科学领域:

进化生物学是进化的生物学.
规格研究研究规格研究
植物遗传学植物遗传学

背景情况:

亚洲种植的水包括两个亚种:印加和日本.
这些亚种之间部分繁殖隔离的机制尚未完全理解.

研究的目的:

阐明印加大米和日本大米亚种之间生殖隔离的遗传基础.
为了确定导致杂交米交叉的杂交不孕症的分子因素.

主要方法:

在Se locus.的存在-缺席变化 (PAV) 的分析.
对ORF3和ORF4的基因表达和功能分析.
在大米种群中对Se locus的进化分析.

主要成果:

在Se位点的PAV会在印加-日本杂交中引起杂交不育 (HS).
在Se locus中包含两个基因:ORF3 (花粉杀手) 和ORF4 (花粉保护者).
印加的ORF3准了缺乏ORF4的日本花粉,导致堕胎和生殖隔离.

结论:

塞洛克斯PAV是印加-日的生殖隔离的一个关键因素.
了解这种机制可以帮助克服印加-日本杂交大米育种中的障碍.
ORF3被确定为与亚洲种植大米物种复合体相关的基因.

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