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PLANT GENETIC RESOURCES

Genetic Diversity and Population Structure of Wild Lentil Tare

H.W. Huh, Department of Biology Education, Pusan National University, Pusan, 609-735, The Republic of Korea

* Corresponding author: Man Kyu Huh (e-mail: mkhuh200{at}yahoo.co.kr)

Genetic diversity has been studied extensively in the cultivated faba bean (Vicia faba L.). Compared with other ecologically and economically significant herbaceous species, population structure of lentil tare, Vicia tetrasperma (L.) Schreber (Leguminosae), has not been studied. The objectives of this study were to estimate the level of genetic diversity in the species and to describe how its genetic variation is distributed within and among its populations. The percentage of polymorphic loci was 50.0%. Genetic diversity was high at both the species and population levels , whereas the extent of the population divergence was relatively low . In the hierarchical analysis, a great amount of variance was exhibited among populations with respect to regions and a large component of the value was explained by variance among regions with respect to the total . The results were consistent with the strong geographic effect indicated by unweighted pairwise groups method using arithmetic average (UPGMA) and Mantel's test. The correlation between genetic distance and geographic distance by Mantel's test was high and significant . F_is, a measure of the deviation from random mating within populations, was 0.503, indicating that V. tetrasperma is an inbreeding species. An indirect estimate of the number of migrants per generation indicated that gene flow was high among populations. Nearly 88.4% of the total genetic diversity in V. tetrasperma was apportioned within populations. The wide geographic ranges, wild condition of the species, and high fecundity are proposed as possible factors contributing to high genetic diversity.

Abbreviations: UPGMA, unweighted pairwise groups method using arithmetic average

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