Genetic Analysis of Two Weak Dormancy Mutants Derived from Strong Seed Dormancy Wild Type Rice N22 (Oryza sativa)

文献类型： 外文期刊

第一作者： Lu, Bingyue

作者： Lu, Bingyue;Xie, Kun;Yang, Chunyan;Zhang, Long;Wu, Tao;Liu, Xi;Jiang, Ling;Wan, Jianmin;Wan, Jianmin

作者机构：

期刊名称：JOURNAL OF INTEGRATIVE PLANT BIOLOGY （ 影响因子：7.061； 五年影响因子：6.002 ）

ISSN： 1672-9072

年卷期： 2011 年 53 卷 5 期

页码：

收录情况： SCI

摘要： Two weak dormancy mutants, designated Q4359 and Q4646, were obtained from the rice cultivar N22 after treatment with 400 Gy 60Co gamma-radiation. Compared to the N22 cultivar, the dormancy of the mutant seeds was more readily broken when exposed to a period of room temperature storage. The mutants also showed a reduced level of sensitivity to abscisic acid compared to the N22 cultivar, although Q4359 was more insensitive than Q4646. A genetic analysis indicated that in both mutants, the reduced dormancy trait was caused by a single recessive allele of a nuclear gene, but that the mutated locus was different in each case. The results of quantitative trait locus (QTL) mapping, based on the F(2) population from Q4359 x Nanjing35, suggested that Q4359 lacks the QTL qSdn-1 and carries a novel allele at QTL qSdn-9, while a similar analysis of the Q4646 x Nanjing35 F(2) population suggested that Q4646 lacks QTL qSdn-5, both qSdn-1 and qSdn-5 are major effect seed dormancy QTL in N22. Therefore, these two mutants were helpful to understand the mechanism of seed dormancy in N22.

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