Akademik Veri Yönetim Sistemi
CROP SCIENCE, cilt.52, sa.5, ss.2206-2214, 2012 (SCI-Expanded)
The exploitation of exotic germplasm resources in breeding programs is necessary to enhance the diversity of cultivars. The diversity and relationships in a worldwide collection of sesame (Sesamum indicum L.) germplasm were determined in this study. A total of 345 accessions were assessed in relation to 12 qualitative and nine quantitative traits during two growing seasons. The accessions were grouped on the basis of their geographical patterns and morphological and agronomic characteristics. Specific accessions having high seed yield and number of branches and capsules, early maturity, yellow and brown seed color, purple stem and capsule color, hairiness, nonshattering capsules, and determinate growth habit were identified. Multivariate analysis revealed that genetic variation in the entire collection was mainly evident in days to maturity, stem length to the first capsule, plant height, and number of branches. Cluster analysis showed that the germplasm collection was representative of the geographical distribution of sesame. A core collection was developed, providing an indispensable resource for DNA and fatty acid composition studies based on analyses of fewer accessions than the entire collection. Comparison of the core and entire collections based on the qualitative and quantitative descriptors indicated that the core collection was optimal and appropriately represented the entire collection.