Castor (Ricinus communis L.) is an oilseed crop that offers
a wide range of industrial applications. Assessing genetic variation is crucial
for identifying genetically distinct individuals and plays a vital role in
plant breeding programs for developing improved cultivars adapted to varying
environmental conditions. The aim of this study is to evaluate the genetic
diversity among different inbred lines of castor. The investigation was carried
out during kharif, 2024, at the Agricultural Research Station, Ananthapuramu,
Andhra Pradesh, India. Using the Mahalanobis D2 Statistics, 40 castor inbred
lines were examined to determine the extent of genetic diversity for 12 traits.
According to Tocher's technique, the total genetic resource set was divided
into six unique, non-overlapping clusters, indicating the presence of an ample
amount of genetic diversity. Cluster I was the largest one, comprising 32
genotypes, followed by cluster II with three genotypes, and cluster V with two
genotypes. Whereas clusters III, IV, and VI were monotypic, indicating a high
degree of heterogeneity among the lines. Clusters IV and VI had the greatest inter-cluster
distance between them, showing that these genetic resources could be used in
inter-varietal hybridisation. The trait with the highest contribution to
overall divergence was effective primary spike length followed by number of
capsules per primary spike, total seed yield, final plant stand, and 100 seed
weight, demonstrating the potential of the material for further improvement
through those traits.
Author(s) Details
I. K. CHANDANA
Department of Genetics and Plant Breeding, S.V. Agricultural College,
Tirupati-517 502, A.P, India.
A.V.S DURGA PRASAD
Department of Genetics and Plant Breeding, SMGR Agricultural College,
Udayagiri-524 226, A.P, India.
M. REDDI SEKHAR
Department of Genetics and Plant Breeding, SMGR Agricultural College,
Udayagiri-524 226, A.P, India.
Please see the book here :- https://doi.org/10.9734/bpi/asti/v4/6300
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