南方农业学报2017，Vol.48Issue(9)：1560-1567,8.DOI:10.3969/j.issn.2095-1191.2017.09.04
10个糯玉米自交系育种潜力分析
Evaluation on breeding potential of 10 waxy maize inbred lines
摘要
Abstract
[Objective] In the present study,the combining ability and genetic parameters of different waxy maize inbred lines were investigated,in order to provide guidance for improving breeding efficiency of waxy maize.[Method] Ten waxy maize inbred lines were set as tested lines,and five waxy maize inbred lines were set as testers.NCII genetic design was adopted to arrange 50 hybrid combinations.The combining ability and genetic parameters of their quality,disease level of southern corn rust level and yield-related traits(fresh weight,grain weight per ear,days from sowing to shedding,days from sowing to silkinig,plant height,ear height,ear height coefficient) were analyzed.[Result]The results showed that the general combining ability (GCA) of the nine traits among the 10 tested lines was significantly different (P＜0.0 1).GCA of T2 were 7.93 (fresh weight),10.55 (grain weight per ear),10.56 (days from sowing to shedding),11.82 (days from sowing to silking),-33.37 (southern corn rust),-13.51 (ear height coefficient),24.45 (plant height),4.82 (ear height),2.92(quality) at spring sowing,and 21.75(fresh weight),24.21 (grain weight per plant),10.56(days from sowing to shedding),11.82 (days from sowing to silking),-23.36 (southern corn rust),-9.39 (ear height coefficient),14.19 (plant height),3.23 (ear height),2.17(quality) at autumn sowing.The traits ofT2 were stable at spring sowing and autumn sowing.Therefore,it was very likely to breed quality and high-yield combination with T2.While the performance of other inbred lines varied with different traits.The specific combining ability (SCA) of grain weight per ear,disease level of southern com rust,and quality for hybrid combination W 150 × T2 ranked the first,second and fourth at spring sowing,and the first,seventh and first at autumn sowing;and BN2RH×T2 ranked the sixth,third and first at spring sowing and the fourth,first and fourth at autumn sowing.[Conclusion]The tested line T2 has great potential since its sound performance in quality,disease level of southern corn rust and yield-related traits.Other tested lines need to be genetically improved based on local ecological characters and breeding targets.Wl50×T2 and BN2RH×T2 is the most valuable combination with high yield,good quality and resistance to southern corn rust.It can be applied in variety comparative test and regional test in the future.关键词
糯玉米/自交系/性状/配合力/遗传参数Key words
waxy maize/inbred line/trait/combining ability/genetic parameter分类
农业科技引用本文复制引用
张振良,石明亮,薛林,黄小兰,赵俊宇,陆虎华,陈国清,郝德荣,冒宇翔,周广飞..10个糯玉米自交系育种潜力分析[J].南方农业学报,2017,48(9):1560-1567,8.基金项目
江苏省六大人才高峰项目(2013-NY-036) （2013-NY-036）
作物遗传与种质创新国家重点实验室开放基金项目(ZW2014005) （ZW2014005）
南通市农村科技创新及产业化项目(HL2014005) （HL2014005）
南通市应用研究基础项目(MS12016042) （MS12016042）
