Abstract
Black cumin (Nigella sativa L.) is spice which are used as herbal medicine. To study correlation and path coefficient analysis for seed yield and oil content by using 5x5 simple lattice design for 25 black cumin genotypes at Debre-Zeit Agricultural Research Center during 2018/19 cropping season. For this evolution to used 12 characters seed yield and yield related traits. Number of primary branches per plant, secondary branches per plant, number of capsules per plant thousand seed weight, plant height, and number of seeds per capsule are positive and significant correlation with seed yield at both genotypic and phenotypic levels. Seed yield had also significant phenotypic correlation with oleoresin content of seeds. In path coefficient analysis number of primary and secondary branches per plant, number of capsules per plant and number of seeds per capsule plant height, had showed positive direct effects on seed yields at genotypic level. Then again thousand seed weight, plant height, number of seeds per capsule, number of capsule and number of seed per capsulehad positive direct effect on seed yield at phenotypic level.This study showed that Correlation studies provide a better understanding of yield components with seed yield helps the plant breeder during selection in black cumin genotypes. Keywords : Black cumin ,Correlation , path coefficient, Genotypes, phenotypes DOI: 10.7176/JBAH/12-2-02 Publication date: January 31 st 2022
Highlights
Black cumin (Nigella sativa L.) is plants which are used as aspice and medicinal plants, which belongs to a family of Rananculacea
3.1.Genotypic and Phenotypic Correlation Coefficients of Seed Yield with Other Characters The results of genotypic and phenotypic coefficients of correlations are presented in Table 1. plant height, number of capsules per plant, number of primary branches per plant and number of seeds per capsule had positive and significant correlation coefficients with Seed yield at both genotypic and phenotypic levels and number of the secondary branch and thousand seed weight had positive and significant correlation coefficient with seed yield at the phenotype level
The observed positive and significant correlations of seed yield with that above trait except another trait that is a negative and nonsignificant correlation with seed yield suggested that the selection of genotypes for one trait does not affect the seed yield
Summary
Black cumin (Nigella sativa L.) is plants which are used as aspice and medicinal plants, which belongs to a family of Rananculacea. It is originated in Egypt and East Mediterranean. A correlation analysis is giving information about the degree of the relation between the important characters and predicts the good character that used for change of particular trait. It helps in determine the direction and the characters to be consider in improving the yield .Correlated characters are of main importance because of genetic causes of correlations through pleiotropic action or progressive interactions of genes and changes carried about by a natural or artificial selection (Falconer et al, 1996; Sharma, 1998).). In path coefficient analysis the yield effected by the character directed or in directed effects and components provide information for future breeding program. the study of correlation and Path Coefficient Analysis of the trait important to determine the trait that have greater association with seed yield and for various yield and yield contributing traits in black cumin genotypes
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