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The six varieties namely, BSH-2, IBON/97, BB-1, BB-2, KARAN-19 and
KARAN-163 were treated with single stress at crown root initiation
stage, single stress at heading stage, double stresses, one at
crown root initiation and the other at heading stage with a control
(without stress). Yield and yield components and the growth factors
were affected by all soil moisture treatments. Correlation analysis
of grain yield and yield contributing characters indicates a high
positive correlation coefficient with 1000-grain weight, harvest
index, tiller number/plant, fertile tiller number/plant and the
total dry organic matter. Water stress both at crown root
initiation and at heading stage was the most critical than at other
stages. However, in between these two, stress at the heading stage
was the highest. The variety BSH-2 was the most susceptible
whereas; KARAN-163 was the least susceptible one. Out of the six
cultivars of, KARAN-163 gave very good grain yield under all soil
moisture stresses. KARAN-19 might be suitable for cultivation in
unfavorable environments like non-irrigated condition for its
higher grain yield.
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