Genetic variability studies in doubled haploids of Ethiopian mustard (Brassica carinata A. Braun)

Abstract

The doubled haploids of Ethiopian mustard (Brassica carinata A. Braun) were evaluated along with mustard under two environments during rabi, 2010-11. Analysis of variance for different traits such as days to flower initiation, days to 50 per cent flowering, days to 75 per cent maturity, plant height, number of primary branches per plant, number of secondary branches per plant, siliquae per plant, length of main shoot, siliquae on main shoot, siliqua length, seeds per siliqua, 1000-seed weight, seed yield per plant, biological yield per plant, harvest index and per cent oil content revealed the presence of sufficient genetic variability for all characters except siliqua length and per cent oil content in Env. I. On the other hand in Env. II, the presence of sufficient genetic variability for most of the traits was observed. Pooled analysis over environments revealed the presence of g x e interactions for all characters except days to flower initiation and per cent oil content. The estimates of PCV were found to be higher than their corresponding GCV for all characters. In pooled over the environments, high PCV values were observed for siliquae per plant and harvest index. The estimates of GCV were found to be moderate for siliquae per plant. High heritability values were observed for days to 50 per cent flowering followed by days to 75 per cent maturity and days to flower initiation. Expected genetic advance expressed as per cent of mean were moderate for siliquae per plant followed by 1000-seed weight, days to flower initiation and plant height.