学术
三系杂交水稻亲本遗传差异及其与杂种优势的关系研究
邹小云[1,2] 傅军如[1] 彭小松[1] 朱昌兰[1] 贺晓鹏[1] 陈小荣[1] 熊松根[3] 贺浩华[1] 刘宜柏[1]
[1]江西农业大学农学院／江西省作物生理生态与遗传育种重点实验室,江西南昌330045 [2]江西省农业科学院旱作物研究所,江西南昌330200 [3]江西省安义县农业局,江西安义330500
摘 要:
以华中地区大面积应用的4个三系不育系的同型保持系和来自不同生态类型的16个恢复系为材料,根据9个产量及其相关性状进行主成分分析和聚类分析,以欧氏距离为指标,研究了杂交水稻亲本间遗传差异状况及其与杂种优势的关系。结果表明保持系间遗传差异较小,恢复系间及保持系与恢复系间遗传差异较大。对亲本间遗传距离与杂种优势的相关分析表明,三系杂交稻亲本间遗传差异与杂种优势关系不密切,而杂交稻产量的高低与双亲产量尤其是双亲产量平均值的高低密切相关,说明亲本改良在提高杂交稻产量中极为重要。[著者文摘]
文章出处:
《江西农业大学学报》-2007年29卷5期 -707-711页
栏目信息:
分 类 号:
文献标识码:
A
文章编号:
1000-2286（2007）05-0707-05
A Study on the Genetic Difference of Parents and Its Relation to Heterosis in Three-line Hybrid Rice
ZOU Xiao-yun, FU Jun-ru, PENG Xiao-song, ZHU Chang-lan, HE Xiao-peng, CHEN Xiao-rong, XIONG Song-gen, HE Hao-hua, LIU Yi-bai （1.Key laboratory of Crop Physiology, Ecology, Genetics and Breeding,Jiangxi Province ;College of Agronomy,JAU, Nanchang 330045,China; 2.Institute of Upland Crops, Jiangxi Academy of Agricultural Sciences, Nanchang 330200, China 3. Anyi Agricultural Bureau, Jiangxi Province, Anyi 330500, China）
Abstract:
Using 4 maintainer lines and 16 restorer lines as the materials, the genetic difference of the cluster parents and its relation to F1 heterosis were studied through principal component analysis and analysis of 9 yield characters and related characters. The results showed that the genetic difference was comparatively small among maintainer lines, and comparatively larger in restorer lines, and comparatively larger between maintainer lines and restorer lines. The analysis of correlation between the genetic distance of both parents and heterosis of their F1 hybrids showed that there was not a correlation between them among the parents. However, it was found that the grain yield of F1 hybrids was closely related to that of both the parents, especially to the mean value of grain yield of the both parents, which indicated that parental improvement was of great importance to increase hybrid rice yield.[著者文摘]
Key words:
three-line hybrid rice; parent; genetic difference; heterosis; correlation
基金资助:
国家自然科学基金（305600731）、江西省自然科学基金（0430062）、江西省科技攻关项目（200210100201）、江西省重大科技创新项目和江西农业大学青年自然科学基金资助
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