Cytoplasmic Systems in Different Male‐Sterile Lines of Rice

摘要

AbstractIn order to characterize the cytoplasmic system in seven cytoplasmic‐genic male‐sterile lines (CMS; A lines) of rice, viz., V 20A, ‘Zhenshan 97A’, IR 46831A, ‘Madhu A’ (cms‐WA), ‘Yar‐Ai‐Zhao A’ (cms‐Gam), ‘Pankhari 203A’ (cms‐TN) and Wu 10A (cms‐bo) and their isonuclear maintainers (B lines), all possible crosses were made between CMS lines and maintainers (A × B) as well as between the maintainers themselves (B × B). Based on F1pollen and spikelet fertility the CMS lines V 20A, ‘Zhenshan 97A’, IR 46831 A, ‘Madhu’ A possessingcms‐WAcytoplasm were found to be genetically different from ‘Pankhari 203A’ (cms‐TN), Wu 10A (cms‐ bo) and ‘Yar‐Ai‐Zhao A’ (cms‐Gam) cytoplasms.Cms‐boandcms‐TNcytoplasms appeared to be identical. Since thecytoplasmsof the A lines are different from those of the B lines, the nuclear genes operating to cause the