Morphological Analysis and Gene Mapping of a Rice Dwarf Mutant  

一份水稻矮杆突变体的形态特征和基因定位(英文)

作　　者：谢红军 汤国华 詹庆才 曾晓珊 余应弘[2,4] 

机构地区：[1]湖南省水稻研究所,湖南长沙410125 [2]国家水稻改良中心长沙分中心,湖南长沙410125 [3]湖南隆平高科,湖南长沙410125 [4]湖南省农业科学院,湖南长沙410125

出　　处：《Agricultural Science & Technology》2012年第1期29-31,35,共4页农业科学与技术（英文版）

基　　金：Supported by Hunan Provincial Science and Technology Support Program(2008NK2003)~~

摘　　要：[Objective] This study aimed to conduct morphological analysis and gene mapping of a rice dwarf mutant. [Method] A dwarf mutant （Xiaoxiang＇ai） was used as test material for morphological observation. Xiaoxiang＇ai was used as female parent and semi-dwarf material Xiangzao143 was used as male parent to construct populations for genetic analysis. Gene mapping was conducted by using micro- satellite markers. [Result] The average height of Xiaoxiang＇ai was 55 cm; genetic analysis results showed that plant height of F1 individuals was similar with the male parent, while semi-dwarf plants and dwarf plants were observed in F2 populations and the segregation ratio was nearly 3：1, indicating that plant height trait of Xiaoxi- ang＇ai is mainly controlled by one pair of recessive gene located on rice chromo- some 5 and in the upstream of RM249, with a genetic distance of 8.4 cM. [Conclu- sion] rRH is a new dwarf gene in rice.[目的]对一株水稻矮杆突变体的形态特征进行分析,同时进行基因定位。[方法]以一株矮秆突变体(潇湘矮)为研究对象进行形态观察,并以潇湘矮作母本,半矮杆材料湘早143为父本,构建群体进行遗传分析,同时利用微卫星标记进行基因定位。[结果]潇湘矮的平均株高为55cm;遗传分析结果显示所有F1株高偏向于父本,F2群体出现半矮杆植株和矮杆植株,比例接近于3:1性状分离,证实潇湘矮株高性状受1对主效隐性基因控制;将该基因定位于水稻第5染色体上,位于RM249上游,遗传距离为8.4cM。[结论]rRH是一个新的水稻矮杆基因。

关 键 词：RICE Small grain dwarf MUTANT Morphological characteristics GENEMAPPING 

分 类 号：S511[农业科学—作物学]