GENETIC ANALYSIS OF YIELD, YIELD COMPONENTS AND WATER USE EFFICIENCY TRAITS UNDER ORGANIC AND INORGANIC FERTILIZER MANAGEMENTS IN GROUNDNUT (Arachis hypogaea L.)
Loading...
Date
2018
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Acharya N.G. Ranga Agricultural University
Abstract
The present investigation was conducted at dryland farm of S.V.
Agricultural college, Tirupati, during kharif 2017 to study the variability and
genetic parameters, character association and path analysis in thirty
groundnut genotypes under organic and inorganic fertilizer managements.
Analysis of variance revealed significant differences for all the
characters studied under both fertilizer managements indicating the presence
of ample amount of variability among the genotypes. Mean performance of
genotypes revealed that TCGS-1157, ICG-10384, ICG-11322, ICG-7153,
TCGS-1330, Dharani under organic fertilizer management and ICG-7153,
K-9, ICG-11322, TCGS-1330, K-7 bold and Dharani under inorganic
fertilizer management were found promising for yield, water use efficiency
and quality traits.
Higher estimates for GCV and PCV were observed for number of
immature pods per plant, kernel yield per plant, pod yield per plant and total
free amino acids under both fertilizer managements whereas number of pegs
per plant, number of mature pods per plant and number of pods per plant
showed high GCV and PCV in only inorganic fertilizer management.
The characters total free amino acids and carbohydrate content
exhibited high heritability coupled with high genetic advance as percent of
mean under both fertilizer managements whereas SLA at 60 DAS and
xvii
hundred kernel weight showed high heritability coupled with high genetic
advance as percent of mean in organic fertilizer management and plant
height, number of pegs per plant, number of mature pods per plant, number
of pods per plant and kernel yield per plant in inorganic fertilizer
management indicating the preponderance of additive gene action and the
selection for these traits will be effective.
Using D2 analysis thirty genotypes of groundnut were grouped into
seven and five clusters under organic and inorganic fertilizer managements.
The characters oil content in organic and plant height in inorganic fertilizer
management contributed more towards genetic divergence. The crosses
TCGS-1157 X K-7 bold, TCGS-1157 X K-1789, TCGS-1330 X K-7 bold
and Dharani X K-7 bold under organic fertilizer management and K-9 X
ICG-11651, Dharani X ICG-11651, K-9 X K-7 bold, Dharani X K-7 bold
and TCGS-1330 X ICG-11651 under inorganic fertilizer management can
be utilized for development of transgressive segregants for yield, water use
efficiency and quality traits.
Character association analysis revealed that the characters viz.,
number of primary branches, number of pegs per plant, number of mature
pods per plant, number of pods per plant, harvest index, kernel yield per
plant, SCMR at 40 DAS and SCMR at 60 DAS showed significant positive
correlation with pod yield per plant under both fertilizer managements. Path
analysis revealed that kernel yield per plant under organic fertilizer
management and kernel yield per plant and number of pods per plant in
inorganic fertilizer managements exhibited high positive direct effect on pod
yield per plant. Other traits also showed high indirect effects through these
traits indicating the importance of these traits during selection process in
groundnut.
Description
D5716
Keywords
null