摘要
为了选育适应我国种植的薄壳山核桃优良品种,研究薄壳山核桃实生后代的遗传变异规律,对南京中山植物园周边地区树龄在55～60a的249株薄壳山核桃实生后代果实的9个性状方面的遗传变异情况进行了调查与分析。结果表明:果实质量变异度最大,变异系数为26.67%,其它性状变异度都较小,变异系数在7.12%～12.91%之间;果实性状的变异表现为连续变异,属于数量性状遗传;果实性状的分布表现为正态分布规律,偏倚系数较小;果实性状多数指标的相关性显著,其中果实质量与果壳厚度、果实含油率分别与出仁率和种仁含油率呈极显著正相关性,果实质量和果壳厚度分别与出仁率、果实含油率呈极显著负相关性;根据果实性状间的相关性,建立起相关回归模型,决定系数在0.99以上,回归测验的F值达到了6880,均远高于极显著临界值,模型准确可靠。
In order to breed the fine varieties of pecan with high adaptability in China and study the law of inheritance and variation of seedling progeny,nine nut characters of 249pecan seedling progenies at the ages of 55-60years were investigated and analyzed at near Nanjing Botanical Garden Mem.Sun Yat-Sen.The results showed that variation coefficient of nut weight was 26.67%,and the value was the highest,while that of other characters ranged from 7.12% to 12.91%.The characters showed continuous variation,quantitative inheritance,normal distribution,and small bias coefficient.Most characters showed significant relationship.Nut mass was very significantly positive correlated with shell thickness,as oil content in kernel with kernel rate and oil content in nut,while nut mass and shell thickness were very significantly negative correlated with oil contents in kernel and nut,respectively.The correlated regression model was established based on correlation among nut characters,which was precise and reliable for the determination coefficient was over 0.99and Fvalue was 6880.
出处
《经济林研究》
2010年第3期25-30,共6页
Non-wood Forest Research
基金
南京市现代农业项目"薄壳山核桃新品种选育及快繁技术研究"(200901002)
江苏省林业三项工程项目"薄壳山核桃优良品种选育与示范推广"(JSX(2009)01)
关键词
薄壳山核桃
实生后代
遗传变异
正态分布
相关性
回归模型
pecan
seedling progeny
genetic variation
normal distribution
correlation
regression model
