GERMPLASM EVALUATION, CHARACTER ASSOCIATION AND GENETIC DIVERGENCE IN WHEAT[Triticum aestivum L. em. Thell.]
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Date
2016-06-28
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ANDUAT,KUMARGANJ,AYODHYA
Abstract
The present investigation entitled “Germplasm evaluation, character association and genetic
divergencein wheat [TriticumaestivumL. em. Thell.]”wasconducted at Main Experiment Station
(MES) of N.D. University of Agriculture and Technology, Kumarganj, Faizabad(U.P.) during Rabi
2015-2016.Thirty three varieties of bread wheat along with three checks. The experiment was laid out in
Augmented Block Design. The entire experimental field was divided into 5 blocks of equal size and each
block had 6 plots of test entries along with three checks in each block. The characters studiedwere days
to 50% flowering, days to maturity, plant height, spike length, tillers per plant, peduncle length, 1000-
grain weight, biological yield per plant, harvest index and grain yield per plant. The assessment of
existing variability in the indigenous collections was done by computing means, range, correlations,
path-coefficients andgenetic divergence.
The wide range of variation for different characters and comparison of means of germplasm line
indicating existence of very high degree of variability for all the characters in the lines of wheat, The
variety produced highest grain yield per plant followed by ESWYT-108 (9.34g), EBWYT-529 (9.29g),
ESWYT-146 (8.96g), EBWYT-510 (8.83g) and EBWYT-503 (8.78g) while these lines also possessed
average to high mean performance for most of the yield components. Therefore, these entries are
identified as most promising varieties/lines for use in hybridization program me as a donor parents. The
other promising genotypes for other character than grain yield per plant is HRWYT-222 (44.96g)for
1000-grain weight, EBWYT-503 (23.47g) for biological yield per plant, DBW-88 (110.00days)for days
to maturity, ESWYT-131 (20.22cm) for highest peduncle length and ESWYT-131(16.08cm) for
minimum peduncle length, EBWYT-529 (7.00) for tillers per plant, EBWYT-507 (88.95cm) for plant
height, ESWYT-134(10.77cm) for spike length, ESWYT-145 (80.00days) for days to 50% flowering,
ESWYT-146 (44.28%) for harvest index. A very strong positive association of grain yield per plant was
observed with harvest index (0.7790cm) followed by biological yield/ plant (0.7674g), spike length
(0.6077cm) and 1000-grain weight (0.5151g). The characters showing highly significant positive
correlation among yield and its components suggested that during selection these characters may be
given due to importance for developing high yielding varieties. The days to maturity & test weight
showed non-significant negative correlation with grain yield per plant.
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