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中国农学通报 ›› 2024, Vol. 40 ›› Issue (12): 104-112.doi: 10.11924/j.issn.1000-6850.casb2023-0286

所属专题: 水稻

• 生物科学 • 上一篇    下一篇

水稻已克隆中胚轴伸长基因效应解析及优异单倍型鉴定

刘金栋1,2(), 王雅美2,3, 田媛媛1, 刘宏岩4, 孟云2,4, 叶国友2,5()   

  1. 1 中国农业科学院作物科学研究所,北京 100081
    2 中国农业科学院深圳农业基因组研究所,中国农业科学院-国际水稻研究所基因组学辅助种质改良联合实验室,深圳 518120
    3 中山大学农学院,深圳 518107
    4 海南大学三亚南繁研究院,海南三亚 572025
    5 国际水稻研究所,菲律宾马尼拉 090012
  • 收稿日期:2023-03-18 修回日期:2023-04-25 出版日期:2024-04-25 发布日期:2024-04-22
  • 通讯作者:
    叶国友,男,1964年出生,河北张家口人,高级科学家,博士,研究方向:水稻复杂性状遗传机制解析。通信地址:518000 深圳市大鹏新区布新路97号,Tel:0755-23250158,E-mail:
  • 作者简介:

    刘金栋,男,1990年出生,山东济宁人,副研究员,博士,研究方向:作物复杂性状遗传机制解析。通信地址:100081 北京市海淀区中关村南大街12号中国农业科学院,Tel:010-82108889,E-mail:

  • 基金资助:
    中国科学技术协会青年人才托举工程(2020QNRC001); 广东省自然科学基金面上项目(2023A1515012040); 中国博士后科学基金面上项目(2022M723659); 广东省基础与应用基础研究基金项目(2022A1515111057)

The Cloned Genes Related to Rice Mesocotyl Elongation: Effects Analysis and Superior Haplotype Identification

LIU Jindong1,2(), WANG Yamei2,3, TIAN Yuanyuan1, LIU Hongyan4, MENG Yun2,4, YE Guoyou2,5()   

  1. 1 Institute of Crop Science, Chinese Academy of Agricultural Sciences, Beijing 100081
    2 Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen 518120
    3 School of Agriculture, Sun Yat-sen University, Shenzhen 518107
    4 Sanya Institute of Breeding and Multiplication, Hainan University, Sanya, Hainan 572025
    5 International Rice Research Institute, Metro Manila, Philippines 090012
  • Received:2023-03-18 Revised:2023-04-25 Published:2024-04-25 Online:2024-04-22

摘要:

旱直播是未来水稻生产的重要发展方向,在南亚和东南亚籼稻种植区已有较大面积,然而热带和亚热带地区粳稻种植多采用传统育苗移栽。中胚轴长度(Mesocotyl length,ML)是影响水稻旱直播出苗和幼苗活力的重要因素。基于分子标记辅助选择(Molecular marker assisted selection,MAS)育种,培育长中胚轴种质是促进水稻旱直播推广最为经济、高效的方式。迄今,已有4个水稻中胚轴伸长基因报道,即OsGSK2GY1OsPAO5OsSMAX1。笔者选择3K重测序项目中TROP和TEMP粳稻亚群开展分析,测定中胚轴长度并鉴定OsGSK2GY1OsPAO5OsSMAX1基因的优异单倍型。结果表明,TROP和TEMP亚群中胚轴长度呈典型的连续正态分布。OsGSK2、GY1、OsPAO5和OsSMAX1分别包括3、3、3和6种单倍型;同一基因在TROP和TEMP亚群中单倍型分布频率也存在差异。TROP亚群中OsGSK2-Hap1GY1-Hap2OsPAO5-Hap3OsSMAX1-Hap2OsSMAX1-Hap3为优异单倍型;TEMP亚群优异单倍型为OsGSK2-Hap1OsPAO5-Hap2OsSMAX1-Hap2。另外,TROP和TEMP亚群中多数中胚轴优异单倍型材料所对应的苗高要高于非优异单倍型,在破土出苗时易形成生长优势。鉴定到的优异单倍型在TROP和TEMP亚群中均呈现较显著的加性效应,可用于MAS育种。本研究为不同地区直播粳稻的选育提供参考,促进旱直播技术的快速推广。

关键词: 单倍型, 中胚轴长度, 水稻, 优异单倍型

Abstract:

Dry direct seeding is an important future direction of rice production with a large area in South Asia and Southeast Asia of Indica rice growing regions. However, Japonica rice planting in tropical and subtropical areas mostly adopts traditional transplanting method. Mesocotyl length (ML) is an important factor affecting the emergence and vigor of rice seedlings in dry direct seeding. Breeding long mesocotyl germplasm based on molecular marker assisted selection (MAS) is the most economical and efficient way to promote the popularization of rice direct seeding. So far, four rice mesocotyl elongation genes have been cloned and reported, namely OsGSK2, GY1, OsPAO5 and OsSMAX1, respectively. In this study, we selected the TROP and TEMP Japonica rice subpopulations originated from the 3K re-sequencing project for analysis, determined the length of mesocotyl and identified superior haplotypes of OsGSK2, GY1, OsPAO5 and OsSMAX1. The results showed that the ML of TROP and TEMP populations presented a typical continuous normal distribution. OsGSK2, GY1, OsPAO5 and OsSMAX1 include 3, 3, 3 and 6 haplotypes, respectively. The frequency of haplotype distribution was different in TROP and TEMP panels for the same gene. OsGSK2-Hap1, GY1-Hap2, OsPAO5-Hap3, OsSMAx1-Hap2 and OsSMAx-Hap3 were identified as superior genes in TROP panel; whereas superior haplotypes OsGSK2-Hap1, OsPAO5-Hap2 and OsSMAX1-Hap2 were identified in TEMP panel. In addition, the seedling height for superior haplotype accessions was higher than that of un-superior haplotype accessions in the TROP and TEMP panels, which was easy to form a growth advantage in growth. The superior haplotypes identified showed significant additive effects in TROP and TEMP panels, which could be used in MAS breeding. This study provides reference for the breeding of direct seeding Japonica rice in different regions, and promotes the rapid popularization of dry direct seeding technology.

Key words: haplotypes, mesocotyl length, rice, superior haplotypes