Variability for Seedling Vigour in Two Maize (Zea mays L.) Populations
I: Means, Variance Components and Heritabilities
Abstract:
The objective of this study was to evaluate genetic variability and
heritability for various seedling traits among S1 families of both
maize populations. Three hundred S1 families of two maize populations,
viz., UAF Population-1 and UAF Population-2 were evaluated for various seedling
vigour traits in two replicates. Highly significant mean squares for almost
all the seedling traits indicated the presence of sufficient amount of variability
for these traits. Genotypic coefficients of variation were comparatively higher
for shoot dry weight, shoot fresh weight and root dry weight in both populations.
The estimates of genetic variance were found significant for almost all the
seedling traits except for emergence rate index which indicated the presence
of exploitable genetic variability. The estimates of broad sense heritability
were significant for all the seedling traits except for emergence rate index
in UAF Population-1. The most heritable traits were shoot fresh length (h2
= 0.63 and 0.68) and shoot fresh weight (h2 = 0.59 and 0.63) in both
populations which suggested that improvement in seedling vigour is possible
by using S1 family selection.
How to cite this article
Muhammad Jawad Asghar and Iftikhar Ahmad Khan, 2005. Variability for Seedling Vigour in Two Maize (Zea mays L.) Populations
I: Means, Variance Components and Heritabilities. Pakistan Journal of Biological Sciences, 8: 839-843.
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