籼型新质源三系不育系CA的选育与应用

Breeding and Utilization of Indica CMS Line CA of a New Cytoplasmic Type

ＣＡ为新育成的籼型新质源不育系，具有ＩＲ２８ 的胞质，花粉不育度和不育株率均为１００％ ，农艺性状优良，遗传性状稳定，开花习性好，配合力强，杂种Ｆ１ 代米质优、产量优势强。所配组合ＣＡ／ＣＤＲ２２、ＣＡ／１３０、ＣＡ／多系１ 号、ＣＡ／绵恢２０４０ 等在省、市区试中比对照汕优６３ 增产５％ 以上，其中Ｃ优２２ 已于１９９９ 年５ 月通过四川省品种审定。

CA is a new indica CMS line with the cytoplasm of IR28 which is developed by the Mianyang College of Economy & Technology, Sichuan. Its pollen sterility and percentage of sterile plants are both 100%. It has the characteristics of good plant type, fine agronomic and genetically stable characters, good combining ability and flowering habits. Its F 1 hybrids showed strong yield heterosis and good grain quality. The grain yield of its hybrids was 5% higher than that of check Shanyou 63 in the regional trials. C You 22 (CA/CDR22) was certified by the Crop Appraisal Committee of Sichuan Province in 1999.