Iodent玉米种质改良旅大红骨选系配合力及杂种优势利用研究
采用NCⅡ遗传交配设计,利用Iodent种质改良旅大红骨资源,以优良选系PB-2、PB-3、PB-7、 PB-8、PB-10为母本,以与旅系具有强杂种优势的丹988、铁0322、M54、Mo17、铁7922为测验种,组配获得25份杂交组合,分析5份改良系的主要农艺性状的配合力及杂种优势。结果表明,Iodent种质改良旅系群体具有较大的利用价值,能有效降低杂交种株高、穗位高、果穗行数,增加杂交种的产量、抗倒伏能力、籽粒品质和果穗长度,丹598和丹99长改良群体一般配合力和特殊配合力均较高,容易组配高产杂交组合,在育种中具有较大的应用价值。
英文摘要:
Using iodent germplasm to improve the resource of Luda Red Bone, analyzed the Combining ability and heterosis of the main agronomic traits of five improved lines by using NC II genetic mating design。25 cross combinations were obtained by using PB-2, PB-3, PB-7, PB-8, PB-10 as female parent and Dan988, Tie0322, M54, Mo17 and Tie7922 as test varieties with strong superiority to the inbred lines. The results showed that the improved lodging line population of iodent germplasm had great utilization value. It could effectively reduce the plant height, ear height, row number of ears, increase the yield, lodging resistance, grain quality and ear length of hybrid. The parents of the improved population of Dan598 and Dan99 had high general combining ability and high yield specific combining ability, which were easy to use. Combination of high-yielding hybrid combinations has great application value in breeding.
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