Abstract: Genetics and Germplasm Enhancement， Nanjing Agricultural University， Nanjing 210095， China)
Abstract: In order to explore the combining ability and quality of the newly developed cytoplasmic male sterile (CMS) lines from Zhenshan 97B in indica rice (Oryza sativa L.)， 49 crosses were made according to NC Ⅱ genetic design by using the six newly developed CMS lines (with Zhenshan 97A as reference) as female parents and seven earlymaturity restorer lines as male parents. The results showed that the combining ability of yield and quality of the newly developed CMS lines was improved significantly compared with Zhenshan 97A. Among the CMS lines， Zhenpin A had the highest general combining ability (GCA) of yield， spikelets per panicle and filled grains per panicle， possessed pretty good quality， and showed high rice breeding value．

Key words: indica rice, Zhenshan 97B, CMS lines, combining ability