Indian Society of Genetics & Plant Breeding

Deciphering yield formation process in wheat under contrasting tillage conditions

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Non-availability of the genotypes bred under conservation
agriculture practices and presence of large interaction for
genotype x management, points to the fact that the gain
can be further consolidated through cultivation of
specifically adapted genotypes under conservation
agriculture (CA) in India. Differentially adapted 42
genotypes were grown for two consecutive years under
three tillage conditions. During favorable year (2011-12) for
crop growth, conservation agriculture (CA) provided the
opportunity for benefits of traits like seed width, seed length,
embryo width, initial vigour indicated by normalized
difference vegetation index (NDVI), shoot biomass and
days to maturity to be accumulated into higher biomass at
harvest and higher grain yield realization due to improved
harvest index (HI). Simultaneously, under conventional
tillage raised bed condition probably due to poor water
retention, traits relevant for moisture stress condition like
NDVI 1 representing initial vigour and more ground coverage
in vegetative stage, peduncle length, last node length,
biomass, HI showed positive correlation with yield.
Changing association between traits under different
management condition warrants for caution in the selection
criterion Path analysis shows that selection for higher
biomass with better HI and higher yield under CA can lay
foundation for realization of better gain for yield in future.

Keywords: Conservation agriculture, correlation coefficient, path coefficient, wheat, yield


Year: 2014
Volume: 74
Issue: 4
Article DOI: 10.5958/0975-6906.2014.00878.5
Print ISSN: 0019-5200
Online ISSN: 0975-6906



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