| Abstrakt: |
Eighty two accessions of indigenous grass pea germplasm belonging to seven Indian states viz., Maharashtra (69), Bihar (4), West Bengal (4), Himachal Pradesh (2), Gujarat (1), Odisha (1) and Madhya Pradesh (1) were used for diversity analysis using DIVA-GIS. Morphological variability was observed in qualitative traits such as leaf size (small/medium), plant colour (light green/dark green), pod pigmentation (green/ pigmented) and seed coat colour (greyish white/yellow white /grey/ grey mottle). Variation was observed in number of primary branches per plant (3.4- 7.6), number of seeds per pod (2.25-5.00) and 100 seed weight (3.68-8.53g) with moderate coefficient of variation. Pearson correlation coefficient indicated that the trait plant height negatively correlated with days to flowering (p-value = 0.0001) and seed weight demonstrated positive and significant correlation with days to maturity (p value < 0.0001). High Shannon diversity index value of 2.5-4.0, 1.12-2.0, 2.16- 3.00 and 2.4-4.0 recorded for the traits plant height, maturity, pod length and test seed weight respectively for the grass pea accessions sourced from Maharashtra state followed by West Bengal. The Ward's minimum variance dendogram generated for the quantitative traits indicated that the presence of two major groups at 0.55 Euclidean distances (Semi-partial R-squared value). Potential areas for germplasm collection for specific traits viz., plant height, test seed weight, number of primary branches and number of seeds per pod were identified using DIVA-GIS analysis. Based on GIS analyses, suitable conservation strategies for grass pea genetic resources have also been explained. [ABSTRACT FROM AUTHOR] |
