Abstract
Twenty accessions of Lathyrus belonging to four different species such as L. sativus, L. cicera, L. aphaca and L. odoratus were obtained from ICAR-National Bureau of Plant Genetic Resources (NBPGR) genebank, New Delhi and the International Center for Agricultural Research in the Dry Areas (ICARDA). All the accessions were grown at the experimental farm of ICAR-NBPGR, New Delhi, India, during the rabi seasons of 2018-2019 and 2019-2020. Agro-morphological delineation was carried out using 24 qualitative and 18 quantitative traits by following standard Lathyrus descriptors. The results indicated a wide range of variation for both qualitative and quantitative characteristics among the accessions. Remarkable distinguishing feature was observed at the different crop growth stages like seedling, pod and maturity stage. Among the species, L. odoratus had early maturity, whereas L. aphaca exhibited late maturity. The average value of hundred seed weight was highest in L. sativus followed by L. cicera and L. odoratus while the lowest value was recorded in L. aphaca. Based on hierarchical clustering, all accessions were grouped into four clusters. Our findings could be used as reference in species identification and understanding the diversity within and among Lathyrus species.
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