Characterization of ridge gourd germplasm accessions for qualitative and seed quality traits

Dr. Manjusha Verma

doi:10.56093/ijas.v95i9.167042

Authors

Dr. Manjusha Verma ( Principal Scientist) ICAR-National Bureau of Plant Genetic Resources, New Delhi

https://doi.org/10.56093/ijas.v95i9.167042

Keywords:

Ridge gourd, plant vigor, germination %, vigor index, Shannon diversity index

Abstract

Two hundred ridge gourd germplasm accessions from India’s national genebank were evaluated for 14 qualitative traits and three seed quality parameters in two consecutive spring summer seasons of 2021 and 2022 at ICAR-NBPGR, New Delhi. A significant level of diversity was observed in seed quality parameters (germination percentage and vigor index I) as well as qualitative traits (hundred seed weight, early plant vigor, plant growth habit, fruit shape, ridge number and ridge pattern). The germplasm had all the three fruit shapes i.e., elongate, elliptical, and oblong, and 155 accessions displayed continuous ridges with ten ridges. Elongate shaped fruits at the marketable stage (83.5% of the accessions) with excellent ridge character make them visually appealing and well-suited to Indian conditions. Pearson’s correlation analysis revealed that germination percentage showed a significant positive correlation with vigor index and early plant vigor. Shannon diversity index pointed to the existence of phenotypic variation across traits, ranging from 0.31 (ridge number) to 2.06 (vigor index I). Traits such as vigor index I, germination percentage, hundred seed weight, early plant vigor, and plant growth habit demonstrated high diversity indices (>0.5). Accessions IC 352782, IC 353319, IC 338527 and IC 344351 were identified as superior for seed quality traits, exhibiting high germination percentage (>95%) and vigor index I (>1800) in comparison to checks. These four accessions are expected to be good starting points in the ridge gourd breeding programs.

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