摘要
用 2个偏型不育系 ms(ven) - 1 49和 ms(ven) - 690 1为供试材料 ,结合在近年来利用CMS和 CHA法进行杂种小麦研究和应用中 ,有关亲本繁殖及杂交种制种技术的研究和实践 ,对杂种小麦繁制种技术进行分析研究。试验表明 ,用作杂种小麦制种的母本柱头生活力约持续 1 5d左右 ,CMS母本较 CHA母本柱头生活力持续时间长。在进行花期调节时 ,CMS母本可比父本早 2～ 6d,CHA母本可比父本早 2～ 4d。最佳父母本行比以 1∶ 2较为适宜 ,基本播幅为 1 .6m。在花期相遇不好的情况下 ,人工辅助授粉可明显提高异交结实率。为了保证繁制种质量 ,安全隔离和彻底去杂是杂交种繁制的重要措施。
Remarkable progress has been made in hybrid wheat in China.But hybrid wheat want go to farmer,the efficient seed production techniques must be developed.Hybrid wheat seed production techniques were studied.The stigma viabilities of female could last 15 days,being divided into four stages,such as the initial flowering stage,full flowering stage,late flowering stage and the end flowering stage.The optimum nick had been shown to be from +2 to +4 for CHA system and to be from +2 to +6 for CMS system.The best row ratio between male and female parents was 1∶2(1.6 m∶3.2 m).Some forms of artificial assitance for pollen had the obvious effects upon the seed set bearing percentage of poor nick.The techniques used for hybrid seed purity were reviewed in his paper.
出处
《西北植物学报》
CAS
CSCD
2001年第2期345-350,共6页
Acta Botanica Boreali-Occidentalia Sinica
基金
国家自然科学基金! ( 39970 4 54)
国家"九五"
陕西省"九五"杂种小麦攻关资助
