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水稻东野型不育系异交不亲和性的鉴定和遗传分析
引用本文:熊涛,聂元元,毛方明,雷建国,毛凌华,朱珊,黄仁良,沈显华,严松. 水稻东野型不育系异交不亲和性的鉴定和遗传分析[J]. 中国水稻科学, 2020, 34(6): 520-524. DOI: 10.16819/j.1001-7216.2020.0610
作者姓名:熊涛  聂元元  毛方明  雷建国  毛凌华  朱珊  黄仁良  沈显华  严松
作者单位:1. 江西省农业科学院江西省超级水稻研究发展中心南昌 330200;2. 江西省农业科学院科技管理处南昌 330200;3. 江西省农业科学院水稻研究所南昌 330200
基金项目:江西省重点研发计划资助项目(20181ACF60001);江西省自然科学基金资助项目(20202BABL205015)
摘    要:目的 在东野型新三系杂交水稻研究过程中,发现不育系与部分品种杂交或回交存在异交不亲和性。对该性状开展研究,为东野型不育系异交不亲和性的改良提供理论依据,促进东野型三系体系的应用。方法 采用东野型同质异核不育系和野败型异质同核不育系分别与保持系品种进行杂交,研究东野型不育系异交不亲和性的产生原因,进而利用一套染色体单片段代换系分别与东野型不育系DY1A杂交,开展遗传分析,并进行基因初步定位。结果 异交不亲和性由核质互作产生,且有两种类型,分别发生在杂交当代和回交世代。针对第一种类型,初步遗传分析显示异交不亲和性在细胞核内受单隐性基因控制,暂命名为CI1(t),将该基因初步定位在第8染色体RM6838和RM5767两个标记之间,与RM3395连锁。结论 东野型不育系的异交不亲和性可以通过分子手段进行遗传改良。

关 键 词:东野型不育系  异交不亲和性  染色体单片段代换系  遗传分析  基因定位  
收稿时间:2020-06-30
修稿时间:2020-09-29

Identification and Genetic Analysis of Cross-incompatibility ina RiceDW-type Sterile Line
Tao XIONG,Yuanyuan NIE,Fangming MAO,Jianguo LEI,Linghua MAO,Shan ZHU,Renliang HUANG,Xianhua SHEN,Song YAN. Identification and Genetic Analysis of Cross-incompatibility ina RiceDW-type Sterile Line[J]. Chinese Journal of Rice Science, 2020, 34(6): 520-524. DOI: 10.16819/j.1001-7216.2020.0610
Authors:Tao XIONG  Yuanyuan NIE  Fangming MAO  Jianguo LEI  Linghua MAO  Shan ZHU  Renliang HUANG  Xianhua SHEN  Song YAN
Affiliation:1. Jiangxi Super-rice Research and Development Center, Jiangxi Academy of Agricultural Sciences, Nanchang 330200, China;2. Department of Science and Technology Management, Jiangxi Academy of Agricultural Sciences, Nanchang 330200, China;3. Rice Research Institute, Jiangxi Academy of Agricultural Sciences, Nanchang 330200, China
Abstract:【Objective】In the process of breeding DW-type three-line hybrid rice, cross incompatibility (CI) was found when the cytoplasmic male sterile (CMS) lines were crossed/backcrossed with some varieties. We focused on the traittolayatheoretical basis for improving CI of DW-type CMS lines, so as to promote the application ofDW-type three-line. 【Method】With isocytoplasmallonuclear materials of DW-type and isonuclear alloplasmic male sterile lines of WA-type as female parents, maintainer lines as male parents, cross experimentswere carried out to investigate the cause of CI. Genetic analysis and gene rough mapping were conducted using a set of chromosome single segment substitution lines, which were crossed to a DW-type CMS line DY1A, respectively.【Result】The CI was caused by nuclear-cytoplasmic interactions. Two types of CI were observed that the first type occurred in F0 crosses and another after backcrossing. For the first type, primarily genetic analysis showed that the CI was controlled by a recessive gene in the nucleus, temporarily named CI1(t), which was then mapped between the two markers RM6838 and RM5767, linked toRM3395,on chromosome 8.【Conclusion】The CI of DW-type CMS linescould beimprovedby molecular methods.
Keywords:DW-type sterile line  cross incompatibility  chromosome single segment substitution lines  genetic analysis  gene mapping  
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