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本研究表明,玉米不同基因型杂交,F_1代籽粒淀粉值表现为从无优势到强优势的数量遗传变化。认为:①双亲淀粉含量都高时,F_1代淀粉含量亦高,而且具有特殊配合力效应——超显性遗传;②若双亲之一淀粉含量比较低时,难以获得高淀粉的 F_1代,而只能是接近于较高亲本;③淀粉含量不是增加 F_1代籽粒产量的唯一因素。 相似文献
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塘四平头种群自交系在吉林省玉米育种和生产中的利用 总被引:3,自引:1,他引:2
塘四平头种群自交系(塘四平头及其衍生系)是我国玉米育种的五大骨干杂种优势类群之一,建立在黄早四及其改良的衍生系(黄改系)基础之上,具有配合力高、株型好、耐旱耐瘠、适应性广等特点.统计分析吉林省1980~2008年审(认)定的466个品种亲本的遗传组成,有124个品种利用了塘四平头群种质,占26.6%.其中吉单180、四单19、吉单209、通吉100、郑单958、银河101等品种在吉林省种植面积较大,为吉林省的粮食生产、畜牧业及加工业的发展做出了巨大贡献.本文针对塘四平头种群自交系及其组配的杂交种耐旱、质优、耐密高产等特性,浅议了在吉林省玉米育种和生产上进一步应用的发展前景,提出了吉林省利用塘四平头群种质应注意的几个问题. 相似文献
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玉米基础种质杂种优势模式分析 总被引:2,自引:1,他引:1
In present paper total combining ability,over mid-parent and over high-parent about ear weight were analyzed with 45 crosses made from 10 maize inbred lines of basic germplasm in domestic by Griffing Ⅳ design.The results showed that the heterosis reflected by ear weight,general combining ability,over mid-parent and over high-parent were almost consistent.Heterosis patterns of ear weight were dynamic and changed with different germplasm resources,the different times and the different regions.Qi 319 and Shen137 maize inbred lines came from P group were high in general combining ability with other germplasm group.Main heterosis pattern at local place in this study: Lvdahonggu group×P group,Reid group×Lvdahonggu group,Tangsipingtou group×P group,Lancaster group×P group. 相似文献