Indian Society of Genetics & Plant Breeding
Joint regression analysis over eight environments in 8
genetically diverse amaranth genotypes during kharif
seasons of 2001-2004 at Sangla (Distt. Kinnaur) and Salooni
(Distt. Chamba) indicated the presence of genotype x
environment interaction for all the traits studied. Significant
pooled deviations for all the traits indicated predominance
of the nonlinear component. Estimates of stability
parameters revealed that no genotype was stable for the
traits studied. Based on the mean performance (x),
genotypes Annapurna, Suvarna and PRA-1 showed
significantly higher seed yield than the Local check.
Suvarna was significantly early in flowering (54 days) and
maturity (107 days) than the other genotypes, whereas
PRA-1 showed maximum mean plant height and
inflorescence length. Significant linear regression
coefficient value for seed yield indicated above average
(b>1) stability for the genotype Annapurna i.e. suitability
for the input responsive environment, whereas for plant
height the genotype was significantly least responsive i.e.
exhibited below average (b<1) stability showing fitness
for the low yielding environment. PRA-1 was also found
to be significantly responsive for plant height in
comparison to the Local check. Genotypes PRA-2 and
the Local check exhibited least responsiveness for days
to 50% flowering. Considering the stability parameters in
general, genotype Suvarna is by far the best genotype
followed by Annapurna and PRA-1 for cultivation in the
higher regions of Himachal Pradesh.
Keywords: Amaranthus, G x E interaction, stability parameters
Year: 2007
Volume: 67
Issue: 2
Article DOI: NA
Print ISSN: 0019-5200
Online ISSN: 0975-6906
N. Kishore, R. K. Dogra, S. R. Thakur and R. K. Chahota info_circle
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