International Journal of Pure & Applied Bioscience (IJPAB)
Year : 2018, Volume : 6, Issue : 1
First page : (67) Last page : (70)
Article doi: http://dx.doi.org/10.18782/2320-7051.5893
Study of High Heterotic Crosses in Relation to Combining Ability and Genetic Divergent Parents in Herbaceum Cotton
T. T. Patel1 and Dharmendra Patidar2*
1Associate Research Scientist, 2Asssistant Research Scientist,
Regional cotton Research Station, AAU, Viramgam Dist. Ahmedabad, Gujarat, India
*Corresponding Author E-mail: tikendrap@gmail.com
Received: 12.10.2017 | Revised: 18.11.2017 | Accepted: 26.11.2017
ABSTRACT
Study was conducted on genetic divergence among sixty genotypes of G. herbaceum along with their combining ability and heterosis using 10 diverse parents in diallel analysis. Observations on five representative randomly chosen plants were recorded for days to squaring, average boll weight, number of bolls per plant, number of seeds per boll, seed cotton yield per plant, lint yield per plant, ginning percentage, mean fibre length, fibre finness, fibre bundle strength, seed fibre index and mean values were used to compute D2 statistics, heterosis and combining ability following Model I method 2 of Griffings (1956). The comprehensive analysis of breeding value of different genotypes was done based upon heterosis, combining ability effects of parents and crosses among them, and genetic divergence between parents involved in the cross. Highest heterosis for seed cotton yield per plant was observed in cross Gvhv 235 x Gvhv 473 followed by Gvhv 133 x Gvhv 235 and Gvhv 235 x Gvhv 404. These crosses involved parents with good general combining ability and maximum divergence among parents. Gvhv 404 and Gvhv 235 formed separate cluster with high cluster distance from rest of the clusters with high heterosis for seed cotton yield and many yield contributing characters. Gvhv 404 and Gvhv 235 figured potential parents worth exploiting for genetic gains for seed cotton yield and its contributing traits. Crosses Gvhv 235 x Gvhv 473 and Gvhv 235 x Gvhv 404 were identified to be exploited for genetic enhancement for yield improvement in G. herbaceum.
Key words: Heterosis, Cotton, Genetic, Genotypes
Full Text : PDF; Journal doi : http://dx.doi.org/10.18782
Cite this article: Patel, T.T. and Patidar, D., Study of High Heterotic Crosses in Relation to Combining Ability and Genetic Divergent Parents in Herbaceum Cotton, Int. J. Pure App. Biosci.6(1): 67-70 (2018). doi: http://dx.doi.org/10.18782/2320-7051.5893
