ARVINTH S., R. N. PATEL, R. A. GAMI* AND A. H. JOSHI
Department of Genetics and Plant Breeding, CPCA, S. D. Agricultural University, Sardarkrushinagar (Gujarat)
Potato Research Station, S.D. Agricultural University, Deesa-385 535 (Gujarat)
Sorghum Research Station, S.D. Agricultural University, Deesa-385 535 (Gujarat)
*(e-mail : ramangami@gmail.com)
(Received : 01 September 2021; Accepted : 27 September 2021)
SUMMARY
The present investigation was carried out to assess the genetic variability, character association and path analysis in twenty-two sorghum genotypes during kharif-2020 at Sorghum Research Station, Deesa. The magnitude of the phenotypic coefficient of variations was higher than the genotypic coefficient of variations denoting favourable environment influence to some extent for all the characters. GCV and PCV were higher for HCN content, green fodder yield per plant, dry fodder yield per plant, leaf: stem ratio, and stem girth. High heritability coupled with high genetic advance as per cent of mean was manifested by HCN content, green fodder yield per plant, dry fodder yield per plant, leaf: stem ratio, stem girth, crude protein content, leaf width of blade and Brix content indicated the additive gene action and selection would be effective for these characters. The association study implies that the magnitude of genotypic correlation coefficients was higher than phenotypic correlation coefficients for all the characters studied. Green fodder yield per plant showed highly significant and favourable association with a number of leaves per plant, stem girth, leaf length of blade, leaf width of blade, dry fodder yield per plant at genotypic and phenotypic levels and Brix content was highly significantly correlated at the phenotypic level and significantly correlated at the genotypic level. Hence improvement in forage yield of sorghum can be done by simultaneous selection for these traits. Genotypic path analysis showed that the dry fodder yield per plant had a high positive direct effect on green fodder yield per plant, followed by days to 50 per cent flowering, leaf length of blade, number of leaves per plant and leaf width of blade.
Key words:GCV, PCV, heritability, correlation and path analysis