DINESH DIWAN 1AND S. K. JAIN
SKN College of Agriculture (SKNAU) Jobner, Jaipur (Rajasthan) India
Plant Breeding and Genetics, Rajasthan Agricultural Research Institute (SKN Agriculture University)
Durgapura-302 018, Jaipur (Rajasthan), India
*(e-mail : skjain.pbg.coalalsot@sknau.ac.in)
(Received : 28 February 2021; Accepted : 22 March 2021)
SUMMARY
The 40 accessions of pearl millet were evaluated in randomized block design with three replications at experimental farm, SKN College of Agriculture, Jobner (Rajasthan) during Kharif 2019. The wide range of genetic distinction for yield and yield component traits was recorded in the germplasm considered under study. The first four principal components having eigen value greater than one were extracted from the mean of 10 traits in 40 accessions with 67.61% variances. A variance of 25.71, 16.87, 13.32 and 11.69 % were extracted from first, second, third and fourth principal components, respectively. Hierarchical clustering technique based on ten quantitative trait data using Ward’s method grouped 40 genotypes into five clusters with clear differentiation for different quantitative traits. Mostly accessions were not assembled into the same cluster based on their geographical origins. Based on PCA analysis, the first principal component (PC1) was the most important which accounted 25.71 % of variation with the major contributors traits biological yield per
plant, plant height, panicle length, grain yield per plant and 1000-grain weight. Based on cluster analysis, genotypes of different origin like RIB-12141, Jhukarana, H-77/833-2, G-73-107, RIB-9215, RIB-16332, Desi panchu, AICRP(PM)-21, RIB-10011, AICRP(PM)-292 were grouped in cluster I therefore, breeders can use these genotypes directly as inbred lines and also for further hybridization with low yielding clusters like cluster II and V for yield improvement in pearl millet.
Key words:Pearl millet, PCA, Diversity, germplasm, genotypes