棉花双隐性核雄性不育杂种优势利用研究

Researchen on the heterosis of double recessive male sterile of vpland Cotton

连续两年对ｍｓ５ｍｓ６ 双隐性核不育系７０４１６Ａ作母本组配的１９个Ｆ１杂种主要经济性状进行了研究，其中双隐性核不育Ｆ１杂种籽、皮棉产量竞争优势达显著水准以上的组合分别占７３．６８％和４７．３７％。皮棉竞争优势达显著水准以上的组合９个，竞争优势为７．０４～１８．１６％。产量性状以单件重的竞争优势最为突出，单株结铃数、衣分和衣指的竞争优势则不明显。纤维品质以麦克隆值的竞争优势在现最佳，２．５％跨长、比强度次之。研究结果表明，双隐性核雄性不育是组配丰产、优质、抗病优良杂交强优势组合的理想不育亲本。

This test have studied the major economic character of 'nineteen F1 generations whose female parents is ms5ms6 dou- ble allogene nuclear inherited male sterile line 70416A in two continuous years.The study result indicated that double allogene nuclear male sterile line is ideal sterile parents.