PJB-1998-55
COMPARISON BETWEEN F1 ' S AND THEIR PARENTAL GENOTYPES FOR THE PATTERNS OF CHARACTER CORRELATION AND PATH COEFFICIENTSIN CHICKPEA (CICER ARIETINUM)
A. BAKHSH, T. GULL*, B. A. MALIK AND AFSARI SHARIF*
Abstract
A study was undertaken to estimate the level and pattern of correlation between various plant characters including grain yield, separately in 28 Fls and 18 homozygous parental genotypes of chickpea grown under similar conditions. The correlation coefficients were partitioned into direct and indirect effects through path analysis. Highly significant genetic differences were recorded for all the characters studied both in F1 and parental lines. A comparison between F1 populations and parental lines revealed that the ranges of genotypic variations in F1 were greater than their corresponding ranges in parental lines. Study of correlation coefficients revealed that genetic correlation's in F1's as well as in parental lines were higher than phenotypic correlations. Positive and highly significant genetic correlation of grain yield in parental genotypes was observed with number of primary and secondary branches per plant, pods per plant, l00-seed weight and biologkal yield per plant, whereas in F1 highly significant and positive correlation of grain yield was noted only with number of secondary branches, pods per plant and biological yield per plant. However, F1 and parental genotypes appeared to be similar with respect to the pattern of correlation of grain yield with other plant characters except 100 seed weight. The correlation of l00-seed weight with grain yield in F1 was negative and highly significant, whereas it was positive and highly significant in the case of parents. The study of correlation coefficients between yield components showed that the pattern of correlations between plant height and secondary branches, primary branches and l00-seed weight, biological yield and l00-seed weight and between harvest index and l00-seed weight were dissimilar in F1 and parental genotypes. The results of path analysis showed harvest index and biological yield to have maximum direct effect on grain yield respectively in parental lines and F1 genotypes. These results showed that the pattern and level of association between various plant characters in F1 and parental genotypes were not similar for all the cases. However, the level and pattern of correlation of grain yield with number of secondary branches, number of pods and biological yield per plant were similar in both the sets of genotypes.
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