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当前位置: 首页 > 文章 > 鹅掌楸属种间杂交可配性与杂种优势的早期表现 南京林业大学学报(自然科学版) 2001,25 (2) 34-38
Position: Home > Articles > Crossability and Heterosis for Seed-traits in Liriodendron Journal of Nanjing Forestry University(Natural Sciences Edition) 2001,25 (2) 34-38

鹅掌楸属种间杂交可配性与杂种优势的早期表现

作  者：
李周岐;王章荣
单  位：
南京林业大学森林资源与环境学院
关键词：
鹅掌楸属;可配性;种实性状;杂种优势
摘  要：
研究了鹅掌楸属树科杂交可配性及杂科优势在种实性状上的表现，结果表明：（ｌ）千粒 重和种子饱满率在父本间和母本间差异均达极显著水平，两个性状在不同母本间不相关（ｒ= ０． ００７１），而在不同父本间呈中度正相关（ｒ=０． ６６４ ７）， 因此，不宜以千粒重作为比较母树间种 子品质的指标，而在研究不同父本时种子品质影响时，千粒重指标具有一定的参考价值；（２）不 同交配系统间及同一交配系统内不同交配组合间杂交可配性不同，授粉结实率应作为亲本选 择的重要依据。其中，以中国马褂木为轮回亲本的正、反交回交系统和以中国马褂木为母本的 杂交系统具有较高的杂交可配性，在杂交制科时可加以利用；（３）与中国马褂木种内交配系统 （ＣＸＣ）相比，种间杂交系统（ＣＸＴ）发芽效率提高 ７０．７８％、平均发芽时间缩短1ｄ、发芽高峰 期提早３ｄ，这些都可以看作杂种优势的早期表现形式。而 ＦＩ杂种马褂木自（近）交系统（Ｈ× H发芽效率最低、平均发芽时间最长、发芽高峰期出现最晚，则可能与近交衰退有关。
译  名：
Crossability and Heterosis for Seed-traits in Liriodendron
作  者：
LI Zhou-qi,WANG Zhang-rong (College of Forest Resource and Environment Nanjing Forestry University, Nanjing 210037, China)
关键词：
Liriodendron;Crossability; Seeds trait; Heterosis
摘  要：
A complete diallel cross, including selfs and reciprocals, of ten parents from Liriodendron chinense, L. tulipifera and their interhybrids were conducted. The crossability and heterosis for seedtraits were studied. Analysis of variance for 1 000 samaras weight and full seeds rate revealed that the two traits are all different significantly among male parents and female parents. The correlation coefficient (r) of the two traits are 0. 0071 for female parents and 0. 664 7 for male parents. So, the trait of 1 000 samaras weight is useless in comparing the seed quality of different female parents. The crossability is different obviously among species, individuals in species, mating systems and cross in mating systems. Therefor, the crossability should be considered in parent selection of cross breeding. Three mating systems, C×Ｈ, H× C and C×Ｔ, have higher crossability. It can be used in hybrid production. Compared with the mating system of C×Ｃ, the mating system of C × T can produce the seeds with 70. 78% more higher germination efficiency, one day lesser time of average germination period and three days earlier of germination fastigium. These can be considered as heterosis in seed traits. The mating system of H× H has lowest germination efficiency, longest average germination period and latest germination fastigium. These phenomena are probably caused by selfing depressing

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