تنوع ژنتيكي جمعيت هاي عدس ايران و ارتباط آن با پراكنش جغرافيايي

Genetic diversity and geographical distribution in Iranian lentil accessions

Lentil Collection of National Plant Gene bank of Iran was investigated for trend and pattern of genetic diversity in relationship with geographical distribution in the country in 2000. A total of 990 accessions were evaluated in Karaj at Seed and Plant Improvement Institute Field station. Fifteen morphological and phenological characteristic were evaluated according to the IPGRI descriptors during 200 x growing seasons. Statistical parameters such as mean, mode and variance and Shannon-Weaver Index were calculated for diversity within accessions. Data were analyzed for correlation, factor and cluster analysis studies. The highest value for Shannon-Weaver Index was determined in plant height, 100 seed weight and date of maturity, however, lowest value was determined for pod pigmentation, flower color and tendril length. The observed diversity in this study was about 58% of potential diversity. Accessions from different provinces were significantly different for most of the traits. According to their origin, accessions were grouped in four clusters. The first cluster mostly contained accessions of cold provinces, whereas, accessions of warm provinces grouped in the second cluster. The lentils of Khorasan province clustered in a separate group. Distribution of accessions based on tow first factors in Factor analysis confirmed the results of cluster analysis.