Genetic Divergence 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 significant genetic variability for all characters except siliqua length and per cent oil content in Environment I (Env. I). On the other hand in Environment II (Env. II), the presence of significant genetic variability for most of the traits was observed. Pooled analysis over environments revealed the presence of g × e interactions for all characters except days to fl ower initiation and per cent oil content. All the 33 genotypes could be grouped into three clusters. Maximum genotypes were placed in cluster I. The cluster I exhibited maximum intra-cluster distance (1.12), while maximum inter-cluster distance was observed between cluster II and III (2.34). Maximum contribution towards genetic divergence was due to days to 75 per cent maturity.