Genetic Improvement and Biological Characteristic Analysis of Dwarf Abortive Type Japonica Cytoplasmic Male Sterile Line with Wide Compatibility

doi:10.3969/j.issn.1001-7216.2010.06.006

Abstract

Abstract:

From the view of methodology for genetic improvement of japonica cytoplasmic male sterile (CMS) lines, the breeding of the dwarfabortive type(DA type) japonica CMS line Chunjiang 95A with wide compatibility was described. The biological characteristics of the DA type Chunjiang 95A and its isonuclear alloplasmic CMS line DianI type Chunjiang 95A were investigated. The results showed that the DA type Chunjiang 95A was a japonicalinous CMS line and mainly typical abortive, and had a better fertility stability than stained abortion type japonica CMS lines. The DA type Chunjiang 95A was featured by high stigma exsertion, good flowering habit, high outcrossing rate and wide compatibility. Its recoverability was different from stained abortion type japonica CMS lines. In addition, genetic improvement of the typical abortion type japonica CMS lines and the application prospects of heterosis were discussed.

Key words: wide compatibility, japonica rice, cytoplasmic male sterile line, stigma exsertion, breeding

摘要： 从粳稻不育系遗传改良方法研究的角度，介绍了广亲和粳稻不育系矮败型春江95A的选育经过，并以矮败型春江95A及其同核异质不育系滇Ⅰ型春江95A等为试验材料，开展相关生物学特性研究。结果表明，矮败型春江95A属偏粳型不育系，花粉败育类型以典败为主，育性稳定性明显好于染败型粳稻不育系，矮败型春江95A具有柱头外露率高、开花习性良好、异交结实率高和广亲和性好等特点，其可恢复性不同于染败型粳稻不育系。另外，还对典败型粳稻不育系的遗传改良及其杂种优势的应用前景进行了讨论。

关键词: 广亲和性, 粳稻, 不育系, 柱头外露率, 育种

SONG Xin-wei,LIN Jian-rong,WU Ming-guo*. Genetic Improvement and Biological Characteristic Analysis of Dwarf Abortive Type Japonica Cytoplasmic Male Sterile Line with Wide Compatibility
[J]. Chinese Journal of Rice Science, DOI: 10.3969/j.issn.1001-7216.2010.06.006 .

宋昕蔚,林建荣,吴明国. 矮败型广亲和粳稻不育系的遗传改良及生物学特性研究[J]. 中国水稻科学, DOI: 10.3969/j.issn.1001-7216.2010.06.006 .

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