Allelic Variation of Hd17 for Rice Heading Date is Caused by Natural Selection.

IF 4.8 1区 农林科学 Q1 AGRONOMY
Rice Pub Date : 2025-03-24 DOI:10.1186/s12284-025-00773-9
Zifeng Yang, Yun Li, Jin Liu, Shuiqing Wu, Xuelin Wang, Min Guan, Yanyun Li, Haitao Zhu, Guifu Liu, Shaokui Wang, Guiquan Zhang
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Abstract

Heading date is an important agronomic trait of rice, which directly determines adaptability and yield. Selection for natural variated alleles for heading date genes is an important manifestation of rice domestication that allows rice to spread to more broad geographic areas. In this study, three alleles of the Hd17 gene for heading date were identified by sequence analysis of 14 single-segment substitution lines, 6 wild rice species, and 2524 accessions of O. sativa. The Hd17-1 allele is an ancestral type with a middle heading date. The Hd17-2 allele was caused by the functional nucleotide polymorphism (FNP) of C to T at position 1016 of the gene and exhibits delay heading. The Hd17-3 allele was caused by the FNP of C to T in 1673 point of the gene and shows earlier heading. The Hd17-1 allele is mainly distributed in tropical regions, carrying by 5 wild rice species, O. glaberrima, and two O. sativa (Aus/Boro and tropical japonica types). The Hd17-2 allele is mainly distributed in subtropical regions, carrying by O. meridionalis, O. rufipogon, and two O. sativa (indica subspecies and Basmati/Sandri types). The Hd17-3 allele is mainly distributed in temperate regions, carrying only by temperate japonica of O. sativa. Hd17-2 and Hd17-3 had been evolved from Hd17-1, independently. Three different rice growing regions formed three alleles of Hd17, showing that the allelic variation of Hd17 is the result of natural selection. We also found that Hd17 controls heading date by up-regulating Ghd7 and down-regulating Ehd1 under long day conditions. Our findings will help to understand the evolution and the regulation of Hd17 in rice.

自然选择导致水稻发棵期 Hd17 的等位基因变异
抽穗期是水稻重要的农艺性状,直接决定着水稻的适应性和产量。抽穗期基因自然变异等位基因的选择是水稻驯化的重要表现,使水稻能够向更广泛的地理区域传播。本研究通过对14个单片段代换系、6个野生稻品种和2524份水稻材料的序列分析,鉴定出3个决定抽穗日期的Hd17基因等位基因。Hd17-1等位基因是一种具有中间抽穗日期的祖先型。Hd17-2等位基因是由基因1016位C到T的功能核苷酸多态性(FNP)引起的,并表现出延迟抽头。Hd17-3等位基因是由基因1673点C与T的FNP引起的,并表现出较早的抽头。Hd17-1等位基因主要分布在热带地区,由5个野生稻品种(光水稻)和2个sativa品种(Aus/Boro和热带粳稻品种)携带。Hd17-2等位基因主要分布在亚热带地区,由O. meridionalis、O. rufipogon和2个O. sativa(籼稻亚种和Basmati/Sandri型)携带。Hd17-3等位基因主要分布在温带地区,仅在温带粳稻中携带。Hd17-2和Hd17-3分别从Hd17-1进化而来。三个不同的水稻种植区形成了Hd17的三个等位基因,表明Hd17等位基因的变异是自然选择的结果。我们还发现,在长日照条件下,Hd17通过上调Ghd7和下调Ehd1来控制抽穗日期。我们的发现将有助于理解Hd17在水稻中的进化和调控。
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来源期刊
Rice
Rice AGRONOMY-
CiteScore
10.10
自引率
3.60%
发文量
60
审稿时长
>12 weeks
期刊介绍: Rice aims to fill a glaring void in basic and applied plant science journal publishing. This journal is the world''s only high-quality serial publication for reporting current advances in rice genetics, structural and functional genomics, comparative genomics, molecular biology and physiology, molecular breeding and comparative biology. Rice welcomes review articles and original papers in all of the aforementioned areas and serves as the primary source of newly published information for researchers and students in rice and related research.
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