Indian Society of Genetics & Plant Breeding

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EFFECTIVENESS OF DIFFERENT SELECTION METHODS IN SEGREGATING POPULATION OF RICE (0. SATIVA L.) IN ARC 10372 X IR 36 IN DIFFERENT ENVIRONMENTS

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Effectiveness of different selection methods (pedigree, bulk and SSD) in segregating
population of rice cross ARC 10372 X IR 36 were worked out under different environments,
viz. selected and tested in irrigated conditions, selected in upland and tested in irrigated
conditions, selected in irrigated and tested in upland conditions and selected and tested in
upland conditions. Substantial variability for yield and its components in F2 gradually
declined with the i~creaseof mean values in subsequent generations of selection from F2
base population and varied from method to method and selection in different
environments. Heritabilityvalues graduallyincreased with the advancementofgeneration.
Whenever heritability was high in the early generations, it continues to remain high even
after subsequent cycles ofselection. Bulk and SSD methods were superior in retaining and
maintaining the high yielding lines in comparison to pedigree method of breeding.
However, genotype X environment X method interaction had much bearing in changing the
expression of yield and its components.
 

Keywords: Breeding methods, pedigree, bulk, SSD, selection response, heritability, upland rice.

Info

Year: 1994
Volume: 54
Issue: 4
Article DOI: NA
Print ISSN: 0019-5200
Online ISSN: 0975-6906

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