Heterosis studies in 6-rowed barley (Hordeum vulgare) under different sowing condition

Chhagan Lal; A S Shekhawat; Jogendra Singh; S S Rajput; Sheetal Raj Sharma; Pawan Kumar

doi:10.56093/ijas.v90i7.105600

Authors

Chhagan Lal Rajasthan Agricultural Research Institute, Durgapura, Rajasthan 302 018, India
A S Shekhawat Rajasthan Agricultural Research Institute, Durgapura, Rajasthan 302 018, India
Jogendra Singh Rajasthan Agricultural Research Institute, Durgapura, Rajasthan 302 018, India
S S Rajput Rajasthan Agricultural Research Institute, Durgapura, Rajasthan 302 018, India
Sheetal Raj Sharma Rajasthan Agricultural Research Institute, Durgapura, Rajasthan 302 018, India
Pawan Kumar Rajasthan Agricultural Research Institute, Durgapura, Rajasthan 302 018, India

https://doi.org/10.56093/ijas.v90i7.105600

Keywords:

Heterosis, Inbreeding depression, Six-rowed barley, Diallel crosses, Grain yield.

Abstract

A set of diallel crosses involving 10 diverse parents (excluding reciprocals) of barlay (Hordeum vulgare L.) was made and its F₂’s were evaluated under three different date of sowings during rabi 2015-16 and 2016-17 at RARI, Durgapura, Jaipur, Rajasthan, India. Heterosis for grain yield per plant ranged from -20.75 to 41.86 %; -21.95 to 39.65 %and -48.13 to 64.34 % under early (E₁), normal (E₂) and late (E₃) sowing conditions, respectively. Out of 45 crosses, nine crosses in E₁ and fifteen crosses in each E₂ and E₃ exhibited positive significant heterosis while, seven crosses in E₁ and E₃ and nine crosses in E₂ exhibited positive significant heterobeltiosis. Negative significant inbreeding depression for grain yield per plant was reported. Overall, crosses BHS 400 × PL 426, PL 426 × RD 2552 and BH 959 × RD 2552 exhibited positive significant heterosis and heterobeltiosis. Hence, these crosses considered to be most desirable for grain yield per plant. The study revealed good scope for commercial exploitation of heterosis as well as isolation of pure lines among the progenies of heterotic F₁ for improvement of yield.

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