麻风树无性系种实性状变异与选择

Fruit traits variation and clone selection of Jatropha curcas

【目的】分析麻风树单果均质量、百粒质量、出仁率、出籽率、种子体积、种仁含油量和单株果实产量等性状的遗传变异,在此基础上,对无性系进行评选.【方法】对海口市新海林场3年生麻风树无性系试验林33个无性系的种实特征进行调查;通过聚类分析,对参试无性系进行分类,并作综合评定.【结果和结论】麻风树无性系间在种实性状上存在显著差异.18号无性系百粒质量最大,26号和20号种仁含油量最高;百粒质量与单果均质量、种子体积和种仁含油量相关性达到极显著水平,种仁含油量除与出籽率和种子体积相关性不显著外,与其他性状相关性均达到显著水平;经综合评价,初步确定1、30、18、15和25号为优良无性系.

Objective] In order to study the genetic variability and select superior clone of Jatropha cur-cas, fruit mass, 100-seed mass, kernel rate, seed rate, seed volume, and oil content were analyzed .[Method] The fruit characteristics of 3 years old J.curcas of 33 clones were investigated in Xinhai For-estry Farm Hainan Province .Using cluster analysis , the further selections of these clones were evaluated .[Result and conclusion] The results showed that there were significant differences in clones of J.curcas. No.18 was the best for the 100-seed mass;the oil content of No.26 and No.20 was better than those of others.100-seed mass had a significant positive correlation with fruit mass , seed volume, and oil con-tent.However, oil content had no significant correlation with seed rate and seed volume , but it had a sig-nificant positive correlation with other character indexes .No.1, No.30, No.18, No.15 and No.25 were selected as the superior clones .