Preponderant alleles at Hd1 and Ehd1 lead to photoperiod insensitivity in japonica rice varieties

IF 1.3 4区农林科学 Q3 AGRONOMY

Crop Breeding and Applied Biotechnology Pub Date : 2023-01-01 DOI:10.1590/1984-70332023v23n3a31

Liting Sun, Tianzi Lin, Dedao Jing, Bo Yu, Shengyuan Zeng, Chuang Li, Huafei Qian, Cancan Du, Qingfeng Hu, Jun Yang, Yiwen Zhou, Zhangping Wu, Hongbing Gong

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引用次数: 0

Abstract

Adaptation of photoperiod-sensitive japonica rice varieties from long-day (LD) to short-day (SD) conditions is impeded by their extremely early flowering in response to photoperiod change, but the genetic factor underlying this is still elusive. We detected mutations in Hd1 in Zhenjing2400 through gene mapping and sequencing analysis. Genome resequencing of the varieties Zhenjing2400 and Jiahe218 identified single nucleotide polymorphisms (SNPs) in the other flowering-related genes Ehd1, SDG725, OsCOL15, DTH2, and DTH7. We constructed recombinant inbred lines (RILs) derived from a cross between Zhenjing2400 and Jiahe218, and selected homozygous lines with these six genes. We established that photoperiod insensitivity is caused by a defective Hd1 gene. In addition, the effect of Hd1 and Ehd1 on heading date was stronger than that of the other four genes. Measurements of agronomic traits and quality traits in homozygous lines demonstrated the superiority of the hd1 ehd1 genotype for eating quality and photoperiod-insensitive high yield.

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Hd1和Ehd1的优势等位基因导致粳稻品种光周期不敏感

对光周期敏感的粳稻品种由于对光周期变化的响应而过早开花，阻碍了它们从长日照(LD)向短日照(SD)条件的适应，但这背后的遗传因素仍是未知的。我们通过基因定位和测序分析，检测到珍京2400中Hd1基因突变。对珍粳2400和嘉禾218的基因组重测序发现，其它开花相关基因Ehd1、SDG725、OsCOL15、DTH2和DTH7均存在单核苷酸多态性。以珍粳2400和嘉禾218为材料，构建了重组自交系(RILs)，并筛选了具有这6个基因的纯合子系。我们确定光周期不敏感是由Hd1基因缺陷引起的。此外，Hd1和Ehd1基因对抽穗期的影响强于其他4个基因。纯合子系农艺性状和品质性状的测定表明，hd1 ehd1基因型在食用品质和光周期不敏感高产方面具有优势。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Crop Breeding and Applied Biotechnology AGRONOMY-BIOTECHNOLOGY & APPLIED MICROBIOLOGY

CiteScore

2.70

自引率

13.30%

发文量

审稿时长

6-12 weeks

期刊介绍： The CBAB – CROP BREEDING AND APPLIED BIOTECHNOLOGY (ISSN 1984-7033) – is the official quarterly journal of the Brazilian Society of Plant Breeding, abbreviated CROP BREED APPL BIOTECHNOL. It publishes original scientific articles, which contribute to the scientific and technological development of plant breeding and agriculture. Articles should be to do with basic and applied research on improvement of perennial and annual plants, within the fields of genetics, conservation of germplasm, biotechnology, genomics, cytogenetics, experimental statistics, seeds, food quality, biotic and abiotic stress, and correlated areas. The article must be unpublished. Simultaneous submitting to another periodical is ruled out. Authors are held solely responsible for the opinions and ideas expressed, which do not necessarily reflect the view of the Editorial board. However, the Editorial board reserves the right to suggest or ask for any modifications required. The journal adopts the Ithenticate software for identification of plagiarism. Complete or partial reproduction of articles is permitted, provided the source is cited. All content of the journal, except where identified, is licensed under a Creative Commons attribution-type BY. All articles are published free of charge. This is an open access journal.