论文部分内容阅读
本文观察比较了玉米孤雌生殖诱导系的单倍体诱导频率、开花习性和农艺性状表现 ,以及几个标记性状的主要特点。结果表明 :WS14和Stock 6两个诱导系均能诱导产生玉米孤雌生殖单倍体 ,诱导频率分别为 3 0 6 %和 1 6 1% ,分别比对照系提高 35倍和 18倍。但两个诱导系均存在植株矮小、生育期较短、生产能力较低 ,尤其是难以散粉等缺点 ,作为诱导系直接应用于玉米育种尚有较大困难。在观察的几个标记性状中 ,以显性基因Rnj和Pu联合应用效果最好 ,可有效地识别玉米孤雌生殖单倍体 ,单独应用则存在一定限制。隐性基因gl1识别可靠性较好 ,但需转育到育种材料中才能利用 ,而隐性基因lg1则由于可给育成自交系带来明显缺点性状而难以利用
In this paper, the haploid induction frequency, flowering habits and agronomic traits of maize parthenogenesis inbred lines were observed and compared, as well as the main characteristics of several marker traits. The results showed that both the induction lines of WS14 and Stock 6 could induce parthenogenesis haploid of maize. The induction frequencies were 36.0% and 161.1%, respectively, which were 35 times and 18 times higher than those of the control lines respectively. However, both of the two inducible lines had the shortcomings of short plants, shorter growth period, lower productivity, especially difficult to disperse powder. As a direct induction system, maize breeding still had great difficulties. Among several observed traits, the combination of dominant genes Rnj and Pu was the best, which could effectively identify parthenogenetic haploid maize. There were some limitations when applied alone. The recessive gene gl1 is more reliable, but needs to be transferred to breeding materials. The recessive gene lg1 is difficult to utilize due to the obvious shortcomings of the inbred lines