Generation mean analysis for yield and its component traits in barley (Hordeum vulgare L.)

Abstract

The inheritance of genetic parameters were studied from six generations of three crosses of barley (Hordeum vulgare L.) namely, RD 2503 x BL 2, Raj Kiran x IBVT 12 and RD 2508 x RD 2052 by using generation mean analysis. Six generations of these crosses viz. Pl' P2' F1, F2, BC1 and BC2 were grown separately in randomized block design with three replications during rabi 2003. Observations were recorded for eleven characters namely, days to heading, days to maturity, flag leaf area, plant height, spike length, number of effective tillers per plant, number of grains per spike, test weight, biological yield per plant, harvest index and grain yield per plant, on randomly selected 5 plants in Pl' P2' and Fl' 10 plants in back crosses (BC1 and BC2) and 20 plants in F2 generation. The scaling tests 'A', ' B', 'C' and 'D [1, 2] was used to test the adequacy of the additive - dominance model. Six parameter model for estimation of various genetic component in presence of digenic interaction [3, 4] was used. Three-parameter model was also used when scales were significant.