鹅掌楸不同交配组合种子活力变异  

The Variation of Seed Vigor Among Different Mating Combinations of Tulip

作　　者：李火根[1] 朱双风[1] 胥猛[1] 

机构地区：[1]南京林业大学资源与环境学院,江苏南京210037

出　　处：《吉首大学学报（自然科学版）》2005年第4期50-54,78,共6页Journal of Jishou University(Natural Sciences Edition)

基　　金：国家林业局"长江中下游防护林工程良种繁育中心"项目资助;江苏省高技术研究项目资助(BG2003306)

摘　　要：研究了27个鹅掌楸交配组合种子饱满度、生活力、发芽力等性状的变异.结果表明:中国鹅掌楸、北美鹅掌楸、杂种鹅掌楸平均种子饱满度、平均种子生活力分别为9.00%、5.11%,17.57%、10.76%和29.44%、16.95%.鹅掌楸种子活力种间差异明显,变异趋势为:杂种鹅掌楸>北美鹅掌楸>中国鹅掌楸;同时,同一种源不同个体间种子活力差异明显;不同交配类型种子活力差异显著,控制授粉明显优于自由授粉.A mating design, including full - sib and half- sib from Liriodendron chinense, L. tulipifera and their hybrid, was conducted. The seed plumpness, seed viability and germination ability of 27 mating combinations were studied. The results showed that the seed plumpness of L. chinense, L. tulipifera and their hybrid were 9.00%, 17.57% and 29.44% respectively. The average seed viability of L. chinense, L. tulipifera and hybrid were 5.11%, 10.76% and 16.95% respectively. L. chinense and hybrid had almost the same germination ratio and germination energy （0. 17% ）, while L. tulipifera was a litde better with 1.29% germination ratio and 1.02% germination energy. Combing all the three seed vigor traits, it can be concluded that hybrid was the best, L. chinense was the worst. Meanwhile, a visible variation was found among individuals within provenance for those seed vigor traits studied. A clear rule was found that the seed vigor of combinations derived from control - pollination was better than that from open - pollination.

关 键 词：鹅掌楸 交配组合 种子饱满度 种子生活力 种子发芽力 

分 类 号：S792.21[农业科学—林木遗传育种]