Journal of Environmental Biology

Estimating gene action and combining ability analysis for yield and yield attributing traits in linseed (Linum usitatissimum L.)

E. Ahmad, A.M. Ansari* and D.N. Singh 

Zonal Research Station, Birsa Agricultural University, Palamau-822 102, India

*Corresponding Author Email : majid.gbp@gmail.com

Received: 13.06.2020                                                                   Revised: 15.11.2020                                                    Accepted: 15.12.2020

Abstract

Aim: The aim of the study was to estimate gene action, identify and select superior parents and best hybrid combinations on the basis of estimates of general and specific combining abilities for yield, its related traits in linseed.

Methodology: Twenty eight offspring were synthesized by crossing eight diverse parents in a diallel scheme excluding reciprocals during rabi 2017-18. These 28 crosses along with eight parents and one national check T-397 were sown in rabi 2018-19 in randomized block design with three replication.

Results: Difference among genotypes were highly significant for most of the characters under study. Estimates of variance due to general combining ability (gca) and specific combining ability (sca) and their ratio revealed that both additive and non-additive gene effects were important for different characters studied. Four parents viz., Neelam, Divya, Surbhi and RLC-171 showed highly significant positive general combining ability effects. Divya showed highly significant positive general combining ability effect and observed to be good general combiner for seed yield per plant. The specific combining ability (sca) effects for seed yield per plant varied between -1.11 (NL-260 X Surbhi) and 2.32 (Divya x RLC-171). Sixteen crosses showed positive sca in which ten crosses showed highly significant and positive sca effect. While the cross combination Divya x RLC-171 exhibited positive and significant sca effect for maximum characters under study.      

Interpretation: These crosses may be used in developing high yielding variety by selecting transgressive segregants.       

Key words: Gene action, Combining ability, Linseed, Yield

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