Combining Ability Analysis for Yield and Yield Components of Yinshui-type Japonica Hybrid Rice

• Published in: Hunan agricultural science & technology newsletter : HASTN Vol. 16; no. 3; p. 474
• Main Authors: Zhang, Cheng, Chen, Yajun, Wang, Xianju, Pang, Xiu, Jiang, Wei, Shao, Guojun
• Format: Journal Article
• Language: English
• Published: Changsha Wu Chu (USA-China) Science and Culture Media Corporation 01.03.2015
• Subjects: Cytoplasm; Seeds; Variance analysis
• ISSN: 1009-4229

This study aimed to analyze the yield potential of newly developed Yinshui-type japonica hybrid rice parents and provide the theoretical basis for breeding of Yinshui-type japonica hybrid rice. An incomplete diallel cross of four cytoplasmic male sterile (CMS) lines and four restorer lines was designed to investigate the combining ability for yield and yield components of Yinshui-type japonica hybrid rice. The variances of general combining ability (OCA) for yield traits were extremely significantly different. GCA variances of male parents were higher than that of female parents except for seed-setting rate. The variances of specific combining ability (SCA) for grain yield per plant, number of effective spikes and seed-setting rate were significantly or extremely significantly different. 139A and Wanlun 422 exhibited higher GCA effects. Most yield traits of these two parents belonged to type II Combinations 139AxWanlun 422 and Liaojing10AxWanlun 422 had relatively high grain yield per plant and SCA effects.