Phenotypic diversity and clustering of germplasm accessions of cashew for utilization and conservation

  • A.C. Asna, Jalaja S Menon and M.S. Smitha

Abstract

To promote the better utilization of genetic resources of cashew, 91 accessions maintained at Cashew Research Station, Madakkathara were assessed for 38 phenotypic traits. Frequencies of the phenotypic classes of each character were calculated. The Shannon diversity index (H ') was used to estimate the magnitude of diversity. Polymorphism was high for tree habit (0.96), tree height (0.89), branching pattern (0.89), colour (0.80), ridges (0.93), apex (0.95), cavity (0.90) and weight (0.84) of cashew apple, attachment of nut to apple (0.85), flanks of nut (0.95) and cotyledonary grooves (0.99). The cluster analysis using the squared Euclidean distance method classified the accessions into 13 clusters at a 55 per cent similarity level. More than 50 per cent of the accessions were high yielding with moderate quality kernels. Grouping of the genotypes into agronomic groups revealed the existence of highly prolific accessions with high quality kernels that can be exploited for crop improvement programmes.

Key words: Cashew, Phenotypic diversity, Cluster analysis, Euclidean distance

Published
29-12-2021
How to Cite
Jalaja S Menon and M.S. Smitha, A. A. (2021). Phenotypic diversity and clustering of germplasm accessions of cashew for utilization and conservation. Electronic Journal of Plant Breeding, 12(4), 1218-1226. Retrieved from https://ejplantbreeding.org/index.php/EJPB/article/view/3735
Section
Research Article