耐光氧化水稻体细胞无性系变异体的筛选与初步鉴定  

Screening and Preliminary identification of Somaclonal Variants Tolerant to Photooxidation in Oryza sativa L.

作　　者：陈以峰[1] 孙立华[1] 朱永兰[2] 

机构地区：[1]江苏省农业科学院农业生物遗传和生理研究所,南京210014 [2]江苏省练湖农场农业科学研究所,丹阳212334

出　　处：《中国水稻科学》1997年第2期121-123,共3页Chinese Journal of Rice Science

基　　金："八五"国家攻关生物技术资助!"细胞突变体育种"专题

摘　　要：A series of rice somaclonal variants with photooxidation tolerance have been screened and preliminarily identified. It is indicated that somaclonal variants (regenerating plants) from calli of mature caryopsis of 02428 and Chugoku 91 which are tolerable to photooxidation are also tolerant and that those from 842, Meixuan Minghui 63-38, Meixuan Minghui 63-53, and Guichao 2 which are sensitive to photooxidation display a wide spectrum from sensitivity to tolerance under photooxidative condition, among them (168 variants) from 4 sensitive parents 2 variants (numbered as 93012, 93236) have strong ability and 17 variants have medium ability against photooxidation. Decline of net photosynthetic rates of these tolerant variants is remarkably less than that of sensitive variants under photooxidative condition. Moreover it is initially proved in posterities of some variants that this type of variation is of genetic stability. We suggest that rice somaclonal variants with photooxidation tolerance provide a new source of variation which could be used in breeding rice cultivars with higher photosynthetic efficiency in the near future.A series of rice somaclonal variants with photooxidation tolerance have been screened and preliminarily identified. It is indicated that somaclonal variants (regenerating plants) from calli of mature caryopsis of 02428 and Chugoku 91 which are tolerable to photooxidation are also tolerant and that those from 842, Meixuan Minghui 63-38, Meixuan Minghui 63-53, and Guichao 2 which are sensitive to photooxidation display a wide spectrum from sensitivity to tolerance under photooxidative condition, among them (168 variants) from 4 sensitive parents 2 variants (numbered as 93012, 93236) have strong ability and 17 variants have medium ability against photooxidation. Decline of net photosynthetic rates of these tolerant variants is remarkably less than that of sensitive variants under photooxidative condition. Moreover it is initially proved in posterities of some variants that this type of variation is of genetic stability. We suggest that rice somaclonal variants with photooxidation tolerance provide a new source of variation which could be used in breeding rice cultivars with higher photosynthetic efficiency in the near future.

关 键 词：体细胞无性系 变异 耐光氧化 水稻 

分 类 号：S511.035.3[农业科学—作物学]