GENETIC STUDIES IN F2 PROGENY OF SIXTEEN KENAF CROSSES (Hibiscus Cannabinus L.)

Loading...
Thumbnail Image
Date
1991
Journal Title
Journal ISSN
Volume Title
Publisher
ACHARYA N.G. RANGA AGRICULTURAL UNIVERSITY, RAJENDRANAGAR, HYDERABAD
Abstract
F2 population of sixteen intervarietal crosses of Kenaf (Hibiscus Cannabinus L.) were subjected to genetic analysis for variability, heritability, genetic advance, character association and path analysis on nine quantitative characters viz., plant height, basal stern diameter, number of nodes, days to 50% flowering, fresh plant weight, fibre length, fibre-wood ratio, bark thickness and fibre weight per plant. Analysis of variance revealed that the material used in the present investigation possessed moderate to high genetic variation for all the characters under study except for basal stern diameter. High estimates of genotypic and phenotypic coefficient of variation were observed for fresh plant weight, and moderate for bark thickness, while low coefficients of variation were found for remaining characters under study. Among the crosses studied, the crosses viz., AMC-8/AMC-15 for plant height, AMC-108/AMC-14 for basal stem diameter and fresh plant weight, AMC-8/Ar.1C-7 for number of nodes, AMC- . 53/AMC-7 for days to 50% flowering, AMC-53/AMC-15 for fibre length, bark thickness and fibre weight per plant and MT- 867/HC-683 for fibre-wood ratio, exhibited high variability. THe above crosses could be advanced further, for the improvement in Kenaf. Additive gene action was found to be predominant for the characters plant height and fresh plant weight. Selection can be exercised for obtaining improvement of these traits more effectively. Both additive and nonadditive gene affects were observed for the remaining characters. Careful and restricted selection can be exercised in these populations ·to exploit the non-additive gene action. The character association studies revealed that, the characters viz., plant height, fibre length, bark thickness, fibre-wood ratio and basal stem diameter are positively correlated with fibre yield per plant. The path coefficient• studies revealed that fibre weight per pl~nt can be improved by exercising selection on plant height, basal stem diameter, fresh plant weight, fibre length, fibre-wood ratio and bark thickness as these traits manifested positive, direct effect along with positive correlation with fibre yield.
Description
Keywords
Genetic, studies, F2, progeny, sixteen, Kenaf, crosses
Citation
Collections