摘要
探讨高密度条件下不同生态环境对玉米选择世代F2、F3的选择效果的影响。选择了4个大的生态区作为异地选择鉴定试验点,在高密度条件下(9万株/hm2),对近年外来X系新种质X335的F2、F3等两个世代的变换地选择。结果表明,在东华北、西北春玉米区优良果穗入选率较高,单穗平均粒重较高;在黄淮海玉米区优良果穗入选率较低,单穗平均粒重较低。认为在东华北、西北生态环境下,有利于对玉米杂交分离后代的产量潜力选择;在黄淮海地区则有利于对多种抗性和病虫害的选择。不同生态环境间的变换地穿梭育种选择,有利于对玉米杂交分离后代的单株的产量潜力和耐多种抗性和病虫害的有效选择。
The F2 and F3 progenies of one single crosse introduced recent year were selected for high yielding breeding in different ecological conditions under high density（90 thousand/hm2）,respectively,to which the selection response was investigated.The results showed that the selected ratio and the mean grain weight per ear of superior ears from Northeast and Northwest part of Chinese maize areas was greater than that from Huanghuhai.Ecological conditions in Northeast and Northwest part of China were thought to be beneficial on the selection for high yield potential of progenies of maize crosses,while ecological conditions in Huanghuaihai China for resistances of many diseases,insects and other abiologic stresses,In maize breeding strategies,selection in different ecological conditions alternately was helpful for the both yielding potential per plant and resistances for diseases and insects selection.
出处
《中国农学通报》
CSCD
2008年第12期136-138,共3页
Chinese Agricultural Science Bulletin
基金
北京市科技新星项目"新种质与新方法相结合选育优良玉米自交系研究"(2005B36)
北京农业育种平台"超级玉米"项目(YZPT02)
国家科技支撑计划"超级玉米新品种选育与产业化开发"(2007BAD31B02)
关键词
玉米
不同生态环境
选择效果
maize,different ecological conditions,effect of selection
