EVALUATION OF MINICORE COLLECTION OF GROUNDNUT UNDER ORGANIC AND INORGANIC FERTILIZER MANAGEMENTS
Loading...
Date
2017
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Acharya N.G. Ranga Agricultural University
Abstract
The present investigation was undertaken to generate information on
variability and genetic parameters, character association and path analysis in
168 genotypes and five checks of groundnut under organic and inorganic
fertilizer managements separately. The experiment was conducted at dryland
farm of S.V. Agricultural college, Tirupati, during kharif 2016.
Analysis of variance in respect of 14 characters revealed the existence of
significant differences among the entries for all the characters under both
organic and conventional fertilizer managements except for number of primary
branches per plant, shelling percentage and harvest index which were nonsignificant
under organic fertilizer management and significant under inorganic
fertilizer management indicating the presence of considerable amounts of
genetic variation for different traits in the present material. Based on mean
performance the genotypes viz., ICG-13099, ICG-13942, ICG-13723, ICG10384
and ICG-11687 under organic management whereas under inorganic
fertilizer management the genotypes viz., ICG-434, ICG-13942, ICG-11651,
ICG-12879 and ICG-332 were found promising for yield and its contributing
characters.
The high estimates of GCV and PCV were recorded for number of
immature pods per plant, kernel yield per plant, pod yield per plant, number of
mature pods per plant, number of pegs per plant, total number of pods per plant
under both the managements; for 100 seed weight and plant height under
organic management and for number of primary branches per plant under
inorganic fertilizer management indicated the presence of genetic variability for
these traits and less influence of environment.
High heritability coupled with high genetic advance as per cent of mean
was observed for the characters days to 50% flowering, 100 kernel weight,
plant height, number of mature pods per plant, number of immature pods per
plant and total number of pods per plant under both the fertilizer managements.
Similarly high heritability coupled with high genetic advance as per cent of
mean was observed for pod yield per plant under organic management and for
number of primary branches per plant and shelling percentage under inorganic
fertilizer management. This indicated the preponderance of additive gene
action and selection may be rewarding for improvement of these traits. Further,
moderate heritability coupled with high genetic advance as per cent of mean
was observed for number of pegs per plant, kernel yield per plant and sound
mature kernel percentage under both the fertilizer managements, while the
traits viz., harvest index and pod yield per plant also recorded moderate
heritability coupled with high genetic advance as per cent of mean under
inorganic fertilizer management. Improvement can be brought about in these
traits through simple pedigree method of breeding and phenotypic selection
would be effective.
The character association analysis revealed that significant positive
association of harvest index, 100 seed weight, number of mature pods per
plant, total number of pods per plant, shelling percentage, number of pegs per
plant and kernel yield per plant with pod yield per plant under both the
fertilizer managements, indicating the possibility for simultaneous selection of
these characters would result in improvement of pod yield in the genotypes
under both organic and inorganic fertilizer managements.
Path analysis revealed that kernel yield per plant under organic
management and kernel yield per plant and total number of pods per plant
under inorganic fertilizer management recorded high positive direct effects on
pod yield per plant. Thus, emphasis could be given for these characters during
selection in order to improve pod yield under both organic and inorganic
fertilizer managements
Description
D5515
Keywords
null