Stability analysis of quantitative and qualitative traits in heritage rice landrace Zag (red rice) of Kashmir Himalayas

Abstract

Eighteen red rice collections from different sites of the Kashmir
Himalayas valley were evaluated during kharif - 2017, 2018 and 2019 for
stability performance for yield along with its related traits and cooking
quality traits. The genotype effect had a significant mean square for
all traits except panicle length based on analysis of variance. The
genotype×environment interaction showed a significant difference
for some of the studied traits, which included kernel elongation ratio,
grain yield, number of panicles, 1000 seed weight, kernel length before
cooking and kernel length after cooking. When the environment + (G
× E) interaction is divided into environment (linear), G x E (linear) and
congruent deviation, the mean square by environment (linear) shows
that all attributes are taken into consideration. These results showed a
significant difference between the environments that can have a great
impact on the expression of the studied traits. Similarly, G x E (linear)
was observed to be significant for all traits except 50% flowering
days, plant height and maturity days, which means that the genotype
behaviour of these traits is environmentally predictable and indicates
that this is the function of the components of the linear environment.
Mean squares due to pooled deviation (nonlinearity) were significant
for all traits except 1000 grain weight and kernel breadth before
cooking, suggesting that nonlinear composition is important for
characteristics that contribute to the total G×E interaction. Thus, the
genotypes differ significantly in terms of stability to the environment
for such traits. C-5 has a low average for flowering days up to 50%
and ripening days relative to the population mean, the row also has
a uniform regression coefficient and the least deviation from the
regression of yield showing consistent behaviour of the stream over
the years. Likewise, C14 has a uniform regression coefficient and the
least deviation from the regression for yield as well as a low mean for
days up to 50% flowering and days until ripening, showed suitability
of the line for consistent yield and early maturity.