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EVALUATION OF GREENGRAM GENOTYPES UNDER IMPOSED MOISTURE STRESS CONDITIONS

KrishiKosh

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Field Value
 
Title EVALUATION OF GREENGRAM GENOTYPES UNDER IMPOSED MOISTURE STRESS CONDITIONS
 
Creator DEEPA, M
 
Contributor RAMA RAO, G
 
Subject genotypes, developmental stages, yields, planting, irrigation, diseases, sowing, vegetables, area, seasons
 
Description The field experiment was conducted during late Rabi, 2010-11 at wet
land farm, college of Agriculture, Tirupati. Field experiment was laid out in
factorial randomized block design, replicated thrice. There are three main
treatments i.e. adequately irrigated, imposed mid stress from 30-45 DAS
(flowering stage), imposed end stress from 45-60 DAS (pod filling and
maturity stage) and seven sub treatments (genotypes).
The results revealed that significant differences between irrigation
treatments and genotypes were observed for plant height, leaf area and dry
matter production only after imposition of moisture stress at 30 DAS to
harvest. The effect of end stress on leaf area and dry matter production and
its partitioning was more acute compared to mid stress i.e. imposed stress at
flowering. Among the genotypes, WGG-37 and MGG-357 maintained high
leaf area and dry matter accumulation under irrigated and moisture stress
conditions.
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Similar results were also observed with growth and physiological
traits viz., leaf area index, crop growth rate, net assimilation rate, leaf area
duration, photosynthetic rate, transpiration rate and stomatal conductance.
Among the genotypes tested, WGG-37 and MGG-357 recorded superior
growth and physiological traits.
Among the drought tolerant traits used to evaluate green gram
genotypes, WUE traits specific leaf area(SLA), SPAD chlorophyll meter
readings (SCMR) and high temperature tolerance trait i.e. Fv/Fm were
significantly reduced under moisture stress conditions compared to irrigated
control. However stress at both phenophases showed more or less similar
reduction in values of SLA, SCMR, Fv/Fm values. A significant positive
correlation between SCMR and WUE and a negative correlation between
SCMR and SLA were observed and were already established as good
drought tolerant traits. An inverse relation was observed between SLA and
seed yield and SCMR and seed yield. Among the two superior genotypes,
MGG-357 recorded lowest SLA and high SCMR. Whereas, WGG-37
recorded lowest a SLA with lowest SCMR values.
Yield components viz., number of pods/cluster, number of pods/plant,
number of seeds/pod, pod length, pod yield as well as yields were
significantly varied between irrigation treatments and genotypes. The effect
was more pronounced in end season stress. MGG-357 and WGG-37
recorded higher harvest index, yield and its components, whereas the
genotype TM 96-2 recorded lowest seed yields both under irrigated and
imposed moisture stress conditions.
These results revealed that both MGG-357 and WGG-37 are highly
suitable to the southern zone under both irrigated as well as rain fed
conditions. However, for drought prone areas MGG-357 is recommended
due to its drought tolerance characters. The other genotypes, MGG-348,
MGG-360 ,MGG-347 and LGG-460 recorded moderate growth and yield
attributes, whereas TM 96-2 showed poor performance in all respects.
 
Date 2016-06-02T11:12:04Z
2016-06-02T11:12:04Z
2011
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/66620
 
Language en
 
Relation D8953;
 
Format application/pdf
 
Publisher ACHARYA N.G. RANGA AGRICULTURAL UNIVERSITY