文献类型: 外文期刊
第一作者: Wei, Xiangjin
作者: Wei, Xiangjin;Jiang, Ling;Xu, Junfeng;Zhang, Wenwei;Lu, Guangwen;Zhang, Yongsheng;Wan, Jianmin;Wan, Jianmin
作者机构:
关键词: genetic analyses;heading date;Japonica rice (Oryza sativa L.);Northeast China;photoperiod-sensitivity;temperature-sensitivity
期刊名称:FIELD CROPS RESEARCH ( 影响因子:5.224; 五年影响因子:6.19 )
ISSN: 0378-4290
年卷期: 2008 年 107 卷 2 期
页码:
收录情况: SCI
摘要: Northeast regions of China (38-55 N latitude) play an important role in Japonica rice planting. Heading dates of 10 Japonica rice cultivars native to the Northeast of China were investigated and their sensitivities to photoperiod and temperature were analyzed. The results showed that these Japonica rice cultivars were insensitive to photoperiod but strongly sensitive to temperature, i.e. a high temperature can markedly shorten the heading date. Genetic analyses were conducted on these 10 cultivars using a set of heading date tester lines. All these Japonica cultivars carried a dominant early heading gene Ef-1, and most of these cultivars carried the photoperiod insensitivity allele et, and two types of alleles were presented at the Se-1 locus, including recessive photoperiod insensitivity gene Se-1 a and dominant strong photoperiod-sensitivity (PS) gene Se-1(n). The PS of these cultivars carrying El or Se-1(n) can be repressed or weakened by Ef-1 and the recessive allele hd2 they carried. These results provided a reasonable explanation to the adaptability of Japonica rice to the high latitude environment of the Northeast China, and could be useful for breeding new cultivars well adapted to the high latitude regions and expanding the rice cultivation range. (C) 2008 Elsevier B.V. All rights reserved.
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