Genetic Analysis of Heading Date of Japonica Rice Cultivars in Southwest China

作     者：Zhen-ling ZHOU Xiang-jin WEI Ling JIANG Kai LIU Da-yong XU Hu-qu ZHAI Jian-min WAN ZHOU Zhen-ling1,#,WEI Xiang-jin1,#,JIANG Ling1,LIU Kai1,XU Da-yong2,ZHAI Hu-qu3,WAN Jian-min1,3(1State Key Laboratory of Crop Genetics and Germplasm Enhancement,Nanjing Agricultural University,Nanjing 210095,China;2Lianyungang Academy of Agricultural Sciences,Lianyungang 222006,China;3Institute of Crop Sciences,Chinese Academy of Agricultural Sciences,Beijing 100081,China;# These authors contributed equally to this paper)

作者机构：State Key Laboratory of Crop Genetics and Germplasm Enhancement Nanjing Agricultural University Nanjing 210095 China Lianyungang Academy of Agricultural Sciences Lianyungang 222006 China Institute of Crop Sciences Chinese Academy of Agricultural Sciences Beijing 100081 China 

出 版 物：《Rice science》 (水稻科学(英文版))

年 卷 期：2011年第18卷第4期

页      面：287-296页

学科分类：0710[理学-生物学] 0831[工学-生物医学工程（可授工学、理学、医学学位）] 09[农学] 0901[农学-作物学] 0836[工学-生物工程] 0902[农学-园艺学] 

基　　金：supported by the National Natural Science Foundation of China(Grant No.30871497) the National High Technology Research and Development Program of China(Grant No.2009AA101101) the Program of Introducing Talents of Discipline to University(Grant No.B08025) 

主　　题：rice heading date genetic analysis photoperiod sensitivity temperature sensitivity basic vegetative growth southwest China 

摘      要：Heading date of 26 native japonica rice cultivars in southwest China was investigated, and their basic vegetative growth (BVG), photoperiod-sensitivity (PS) and temperature-sensitivity (TS) were analyzed under artificial short-day and natural long-day conditions in Nanjing, as well as artificial high-temperature and natural low-temperature conditions in winter in Hainan. The results showed that the PS and TS varied among different cultivars. The BVG of all the japonica cultivars was well situated, but differed within cultivars. Regression analysis showed a significant correlation between heading date and PS, indicating that PS was the main factor affecting heading date of japonica cultivars in southwest China. Genetic analysis was conducted on these 26 cultivars using a set of heading date near isogenic lines as test lines. All the japonica cultivars carried the dominant early-heading gene Ef-1 or Ef-1 t , and most of these cultivars carried the dominant photoperiod sensitivity allele E 1 or E 1 t , the PS of which was slightly weaker than E 1 . For the Se-1 locus, these cultivars mainly carried recessive photoperiod insensitivity gene Se-1 e . In addition, the PS of 22 japonica cultivars could be repressed or weakened by the recessive allele hd2, inhibiting the expression of E 1 and Se-1 . These results indicated that the genotypes of heading date determined different PS and well situated BVG in japonica rice cultivars in southwest China.