为使棉花杂种优势能大面积用于生产,经多年努力,我们已育成在子叶及最初几片真叶期就具有明确标记性状,且农艺性状良好,杂种优势明显的一个“芽黄A”雄性不育系。该不育系是1982年在引入的以出苗稍晚、前期发育较迟为标记的由一对隐性基因控制的棉花雄性核不育81A中,发现其中216可育自交系在3-5片真叶时,叶色有黄绿之别,其中黄色与雄性不育完全连锁。当年用它与中棉所10号杂交,并经多年选育而成。该不育系的突出特点是标记性状明显。不育株子叶展4-5天应该转绿时,不能正常转绿,而表现子叶较黄,其第1-3片真叶也较正常植株明显色黄,直至4-5片真叶后才逐渐转为绿色,这种 For many years, we have developed a “bud yellow A” male with well-defined traits in the cotyledons and the first few true leaf stages with good agronomic traits and obvious hybrid vigor. CMS. This male sterile line was introduced into a male sterile line 81A controlled by a pair of recessive genes introduced later in 1982 with later emergence and later development as markers. Among them, 216 male sterile inbred lines were found in 3-5 When the film is really leaves, leaf color has a yellow-green difference, of which yellow and male sterile completely chain. In the past it was crossed with the No.10 CIMC, and after years of breeding. The outstanding feature of this CMS is marked trait. 4-5 days of sterile plant cotyledons should turn green, can not turn green normally, and the performance of cotyledons more yellow, the first 1-3 of the true leaves are also significantly more yellow than normal plants until 4-5 true leaves after Gradually turn green, this