Indian Society of Genetics & Plant Breeding

Simultaneous selection of cultivars for yield and stability in crop improvement trials

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Assessment of cultivar performance in trials conducted
across a range of locations and over years is often
difficult because of the presence of significant location
x year interaction. Methods for separation of environmental
(location x year) variation into predictable and
unpredictable components are available in literature. In
the present paper an index, based on cultivar yield and
the predictable component of environmental variance,
MS(Y/L), is proposed for selecting cultivars simUltaneously
for high yield and stability. Two sets of rice data from
All India Coordinated Rice Improvement Program,
Directorate of Rice Research, Hyderabad, are used to
illustrate the superior performance of the index method
vis-a-vis the procedure advocated by Lin and Binns [2].
A user-friendly computer programme written in 'C' for
judging promising cultivars is developed and available on


Year: 2007
Volume: 67
Issue: 2
Article DOI: NA
Print ISSN: 0019-5200
Online ISSN: 0975-6906



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