Abstract:
The present study 'G x E interaction in the FG generation of wide
crosses of rice (Oryza sativa L)' was carried out under the Department of Plant
Breeding and Genetics, College of Horticulture, Kerala Agricultural University,
Vellanikkara. The study was carried out for 20 characters in nine rice cultures at
three locations viz., Mannuthy, Pattikkad and Adatt. The experiment estimated the
variability, heritability, correlation, path coefficients and stability for the
characters.
High variability and heritability was noticed for most of the yield
characters. The estimates of variability and heritability vaired widely between
locations indicating the preponderance of the environment Correlation and direct
and indirect effects of the characters on yield also differed between the
environments indicating the profound influence oflocation on the character.
Stability analysis revealed that among the rune nee cultures studied,
culture C 26T(b) was found to be stable over locations for most of the yield traits.
Culture C 26T(b) had maximum grain yield and was stable for most of the yield
contributing characters like height of plant at harvest, number of productive tillers,
number of spikelets per panicle, number of grains per panicle, number of days for
physiological maturity, 1000 grain weigh! and grain yield. C 26T(b) showed
superior and stable performance in the hill tracts of Pattikkad, Kole land of Adatt
and at Mannuthy Stability parameters indicated C 80 as the next stable culture. C
80 was stable for the characters total number of tillers, days to 50 per cent
flowering, hulling percentage, milling percentage and amylose content.
