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1989 - 198911990 - 19911

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Author: search.filters.author.Pushkaran, KSubject: search.filters.subject.groundnut varieties

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    Path analysis in groundnut
    (Kerala Agricultural University, 1989) Pushkaran, K; Gopinathan Nair, V
    Eighty groundnut varieties were raised in a randomised block design with three replications in upland during kharif. Pod yield and 17 characters were studied. Correlation coefficients at the genotypic and phenotypic levels were computed between pod yield and other characters and among themselves. Path analysis for dry pod yield was done considering eight important component characters. Dry pod yield was highly correlated positively with fresh weight of pods, haulms yield, number of mature pods, number of immature pods, duration upto maturity and 100 pod weight at the genotypic level. Negative significant correlation was seen for pod yield with plant height at the 50th day, height of main shoot and length of top. Fresh weight of pods had the highest positive direct effect followed by 100 pod weight, haulms yield and number of mature pods whereas length of top, number of flowers, number of basal primary branches and number of leaves exerted negative direct effect to dry pod yield in that order.
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    Genetic parameters for groundnut in summer rice fallows
    (Kerala Agricultural University, 1991) Pushkaran, K; Gopinathan Nair, V
    Genetic parameters for 15 metric characters in 80 divergent varieties of groundnut grown in the summer rice fallows were estimated. The varieties differed significantly in respect of all the characters. The pcv was higher than gcv for all the characters. High estimates of gcv, heritability and genetic advance were obtained for number of branches, flowers and leaves, spread of flowering and 100 pod weight whereas the values were low for fresh weight of pods and dry pod yield. So also the high pcv for dry pod yield suggests that the genetic improvement for the economic trait through selection for summer rice fallows is meagre. Oil content, shelling percentage and duration up to flowering and maturity registered high heritability, but low genetic advance.