Relation between growth and morphological traits and genetic parameters of Robinia pseudoacacia var. monophylla D.C. in northern Greece.
Relation between growth and morphological traits and genetic parameters of Robinia pseudoacacia var. monophylla D.C. in northern Greece.
复制标题
刺槐生长与形态性状及遗传参数的关系
作者：
O. Dini;C. P. Panetsos
对14个刺槐品种自由授粉家系的生长发育与形态性状及遗传参数的关系进行了研究。单叶藻(Monophylla D.C.)1991年在希腊北部成立。连续5年测量树高和胸径，1991年测定每片复叶的小叶数和大小，1992年和1993年测定刺数，1993年测定树干形状。对数据进行方差分析，同时估计遗传力、表型和遗传相关性。结果表明，14个家系在研究期间都有较高的生长率，但从1995年开始树高差异不大，1993年开始胸径差异不显著。家系变异系数与变异系数之比为1/3.6。胸径个体遗传力高于树高，家系遗传力均高于个体遗传力。每片复叶的小叶个数为1~27个，刺的大小为0~25 mm。小叶和荆棘在科内的变异要小得多。根据叶的形态和刺，可分为两种类型：少叶乔木和多叶乔木。少叶乔木和多叶乔木。各生长性状与形态性状之间的皮尔逊相关系数大多达到统计显著水平，但只有少数几个相关系数高到足以解释各性状间相当大的变异。与之相反，树高与胸径的相关系数较高，同一因子不同年龄间的遗传相关均为正相关，对早期检测和选择具有一定的参考价值。
The relation between growth and morphological traits, and genetic parameters were studied in a progeny test of 14 open pollinated families of the black locust monophylla variety (Robinia pseudoacacia var. monophylla D. C.) established in northern Greece in 1991. Measurements included height and dbh for 5 consecutive years, number and size of leaflets per compound leaf in 1991, thorns in 1992 and 1993, and trunk form in 1993. Data were subjected to analysis of variance while heritabilities and phenotypic as well as genetic correlations were estimated. It was found that the 14 families had a high growth rate during the study period but differences began to be insignificant for height in 1995 and dbh in 1993. The ratio of family coefficient of variation to coefficient of variation was 1/3.6. Individual heritability was higher for dbh than for height while family heritability was higher than individual one in both traits. Number of leaflets per compound leaf ranged from one to 27 and the size of thorns from 0 mm to 25 mm. The variation was much smaller within families for both leaflets and thorns. On the basis of leaf morphology and thorns two types of trees were distinguished: oligophyllous, with few but large leaflets and small thorns, and polyphyllous with many but small leaflets and long thorns. Most of Pearson correlation coefficients between the various growth and morphological characters were statistically significant, but only a few of them were high enough to explain a fair amount of the variation between the various characters. On the contrary, the correlations between height and diameter were much higher while the genetic correlations between various ages of the same factor were positive and indicate their value for early testing and selection.