Nutrient use efficiency of various genotypes of bread wheat under low and optimum input conditions
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Date
2015
Authors
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Publisher
CCSHAU
Abstract
The objectives of present two years investigation were to evaluate the various genotypes of bread
wheat for various characters under low and optimum input conditions, to determine the genotypic and
phenotypic variability for the grain yield, its components and morpho- physiological traits under low and
optimum input conditions and to determine the various indices of yield, its components and other morphophysiological
traits for the traits for nutrient use efficiency, to determine the promising genotypes for
nutrient uptake and use efficiency. Results revealed Mean squares due to genotypes were significant for all
the characters. Significant differences due to genotypes for various traits indicated that there was
considerable variation among the genotypes. Genotype × fertilizer (G × F) interaction was significant for
majority of the characters except in Plant height, Chlorophyll content and Number of tillers per plant. This
indicated that genotypes differed in their response from low to optimum input conditions for the characters
under study. Correlation coefficients revealed that the biomass per plant and harvest index was significant
component of grain yield under low and optimum input conditions. Trend deflected the path for grains per
spike, plant height, spikelets per spike, root traits and days to heading and maturity Trend remained same
for the increase in mean performance of genotypes for N, P and Zn use efficiency from low to optimum
input conditions as PBW 533 and WH 1105 under both low and optimum input conditions were better in
mean performance over the years for nitrogen, phosphorous as well as zinc use efficiency. For most of the
characters genotypic and phenotypic coefficient of variability fell out in low range category like plant
height in both years under optimum input conditions and low input conditions in 2013-14, biomass per
plant in 2012-13 and 2013-14 under optimum input conditions, harvest index in 2012-13 under both
optimum as well as under low input conditions. Similarly, under both optimum as well as low input
conditions in both the seasons gcv and pcv for chlorophyll fluorescence, chlorophyll content, 1000- grain
weight , spikelets per spike, grains per spike, days to heading and days to maturity, N content in grains,
root biomass and root length were on lower side indicating less variability per character
Description
Keywords
Nutrient use efficiency, Bread wheat, low input wheat, Root studies, Physiological traits, Low and Optimum input conditions