Abstract
Segregating breeding generations may fluctuate in performance from year to year. The
purpose of our study was to evaluate the performance of these generations in each year
and to make selection according to the existing environmental conditions. The research
was conducted in two consecutive years (2016 and 2017) and the performance of F3
and F4 generations was analyzed. It was found that mean values of all the studied
parameters in F4 population, in this study, were lower than the mean values of F3
generation, however maximum range in F4 exceeded F3 for some parameters. The
selection differential values were also found as negative. Va(Additive variance) values
for all the parameters in F3 and F4 generations were found to be almost same
PCV(Phenotypic coefficient of variation) for most of the parameters in F4, like
yield/plant, fruits/plant, fruit/cluster and fruit length exceeded the PCV values in
F3.Highest value of heritability was noted for yield/plant in F4 while in F3 highest value
was observed for fruit weight. Heritability percentage and genetic advance for all the
parameters in F3 was higher than F4.Mean difference values indicated that some of the
F4 lines were higher than the grand mean of F4 population (in all the studied
parameters). Additionally, means of few F4 lines were also found to be greater than the
means of F3 population for most of the parameters. These results may indicate that these
lines could be selected for better performance if advanced to next generation.
Mehboob Ahmad, Bilal Ahmed Khan, Mazhar Iqbal, Maria Saleem, Farhad Ahmad, Adil Rehman, Akhtar Nawaz. (2018) Comparison of response of F4 and F3 generations of tomato from year to year selection, Asian Journal of Agriculture and Biology, Volume 6, Issue 2.
-
Views
842 -
Downloads
183
Article Details
Volume
Issue
Type
Language
