Korshikov I I, Mudrik E A
Genetika. 2006 May;42(5):659-66.
Based on analysis of variation at ten allozyme loci in three age groups (25-35, 40-80, and more than 100 years of age) of plants and in seed embryos, demographic dynamics of the gene pools was studied in a small (60.5 ha) isolated relict population of chalk pine Pinus sylvestris var. cretacea Kalenicz. ex Kom. from the steppe zone of Ukraine. The observed grenotype proportions in these tree groups were shown to fit Hardy-Weinberg expectations, while in the embryos of their seeds, an excess of homozygotes was observed at five to nine loci. The mean observed heterozygosity in the sample of old (> 100 years of age) trees (H(O) = 0.225) was substantially lower than in trees of the two other age groups (H(O) = 0.307; 0.311), but significantly higher than in the corresponding embryo samples (H(O) = 0.183-0.207). No allele and genotype heterogeneity of the maternal trees and embryos of their seeds was found. However, heterogeneity was high when the progeny of trees of different ages, particularly in pairs with old trees, were compared.
基于对三个年龄组（25 - 35岁、40 - 80岁和100岁以上）的植物以及种子胚中十个等位酶位点变异的分析，在乌克兰草原地带一个面积为60.5公顷的孤立残遗种群——白垩松（Pinus sylvestris var. cretacea Kalenicz. ex Kom.）中研究了基因库的种群动态。结果表明，这些树组中观察到的基因型比例符合哈迪 - 温伯格预期，而在它们种子的胚中，在5至9个位点观察到纯合子过量。老龄（>100岁）树木样本中的平均观察杂合度（H(O) = 0.225）显著低于其他两个年龄组的树木（H(O) = 0.307；0.311），但显著高于相应的胚样本（H(O) = 0.183 - 0.207）。未发现母树及其种子胚的等位基因和基因型异质性。然而，当比较不同年龄树木的后代时，尤其是与老龄树木配对时，异质性较高。
