GENOTYPIC VARIANCES AND INTERACTIONS WITH ENVIRONMENTS IN BARLEY GENOTYPES USING HALF DIALLELE ANALYSIS FOR GRAIN YIELD AND ITS ASSOCIATE CHARACTERS
MOTI RAM* AND A. S. SHEKHAWAT
Department of Plant Breeding & Genetics
Rajasthan Agricultural Research Institute,
(SKNAU, Jobner) Durgapura (Rajasthan), India
*(e-mail : motiram758@gmail.com)
(Received : 15 April 2017; Accepted : 27 May 2017)
SUMMARY
The present investigation was carried out to study components of genetic variance, for yield and yield contributing traits in barley (Hordeum vulgare L.) using half diallele analysis. Ten genotypes along with their 45 F1’s and 45 F2’s were evaluated in three environments created by three different dates of sowing i. e. timely sown, late sown and very late sown, with three replications in a randomized block design during rabi 2015-16 at Agricultural Research Farm of RARI, Durgapura, Jaipur. Each replication contained two parts. First part consisted 10 parents and 45 F1’s sown in two rows plot, while the plots of second part consisted six rows of 45 F2’s. The pooled analysis of variance depicted significant differences for all the studied traits and indicated the influence of environment on the expression of these characters. Further, the mean sum of squares due to parents’ vs F1 and F2 displayed significant difference for all the characters studied except plant height and tillers per plant. .The G × E interaction was also found significant for most of the characters except tillers per plant, flag leaf area, spike length, taking into consideration, significant G × E interaction for most of the characters, the analysis of variance was done for the individual environment separately.
Key words: Genotypic variance, half diallele anaalysis, barley