Heritability and Genetic Advance in Ethiopian Mustard (Brassica carinata A. Brun)

摘要

Evaluation of locally adapted genotypes is helpful in endeavor of improvement of oilseed of Ethiopian mustard (Brassica carinata A. Brun). The present investigation was undertaken to evaluate the performance of different genotypes of Ethiopian mustard, and to estimate the heritability and genetic advance of agronomic traits of these genotypes. The experiment was laid out in simple lattice design at Holetta Research Center, Ethiopia. Wide ranges of mean values were observed for traits such as days toflowering (61-101), days to maturity (155-182), plant height (177-235 m), number of secondary branches per plant (5-25), number of pods per plant (123-279), number of seeds per pod (6-14), number of seeds per plant (3-11), seed yield per plot (334-1300 g), oil yield per plot (141-584 g) and 1000-seed weight (2.4-4.6 g). High genotypic and phenotypic coefficients of variation were shown in traits such as seed yield per plot and oil yield per plot. Low to high heritability values were recorded for the traits studied. High heritability values were recorded for traits such as days to flowering (79.3%), plant height (62.8%), 1000-seed weight (57.9%) and days to maturity (57.5%). Number of seeds per pod, seed yield per plot and oil yield per plot were foundto have high genetic advance along with moderate heritability. Thirteen genotypes had days to maturity less than the grand mean as well as the standard checks which may be used for developing early maturing varieties. Traits which showed wide range of variations may serve for further breeding and selection. Employing breeding procedure such as pedigree method may be helpful for improvement of those traits which showed high genetic advance along with moderate heritability.