陆地棉不同铃期和不同铃位单铃重杂种优势遗传研究  

Study on Boll Size at Different Blooming Stages and Boll-setting Sites in Upland Cotton(Gossypium hirsutum L.)

作　　者：陈柏清[1] 陈青[1] 吴吉祥[1] 

机构地区：[1]浙江省农业厅农作物管理局

出　　处：《棉花学报》1998年第4期199-204,共6页Cotton Science

基　　金：浙江省自然科学基金

摘　　要：采用基因型与环境互作的加性－显性遗传模型分析了陆地棉（ＧｏｓｙｐｉｕｍｈｉｒｓｕｔｕｍＬ．）１２个亲本及其１７个Ｆ１组合两年不同花铃期及不同铃位单铃子棉重的杂种优势。结果表明，８月１３日前各花铃期单铃重的平均优势在５．９％～１０．６％之间，其中８月７日单铃重平均优势达极显著水平，８月１３日后各花铃期单铃重正向优势很小，８月３１日甚至出现一定的负向优势。各果枝的第１果节位及下部果枝的各铃位单铃重平均优势不显著，其余各铃位单铃重平均优势均达显著水平。Twelve parents and their 17 F1 hybrids of Upland cotton (Gossypium hirsutum L.) were analyzed by an additivedominance genetic model with genotype by environment interaction and corresponding statistical approaches for boll size at different blooming stages and fruiting sites in two years. Heterosis for boll size was between 5.6%～10.6% before August 13, respectively. Significant heterosis for boll size was detected during blooming stage from August 2 to August 7. Positive heterosis or boll size reduced sharply since August 13, moreover, small negative heterosis was found on those bolls fruiting after August 26. Heterosis for boll size at first position and all positions of low branches was not significant, and heterosis was significant for boll size at other sites.

关 键 词：陆地棉 单铃重 杂种优势 遗传 铃位 铃期 

分 类 号：S562.032[农业科学—作物学]