Adaptability, correlation and path coefficient analysis among selected variables of sunflower (ilelianthus animus l.) genotypes
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Date
2013
Authors
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Journal ISSN
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Publisher
Sokoine University of Agriculture
Abstract
Three genotypes of sunflower (PI 364860, K.Fedha and Record) were evaluated at three
locations (Seatondale, Inyala and Uyole) and three spacing regimes (75 cm x 45 cm, 75
cm x 30 cm and 75 cm x 15 cm) during the season 2011/12 to estimate the performance of
seed yield and its components. The objectives of this study were to evaluate genotype x
environmental interactions among the selected variables and to determine the
interrelationships and paths of influence among components of yield. Treatments were
combined in a split plot arrangement in a randomized complete block design with three
replications. Data were collected and analysed using GenStat 14th Edition. The genotype x
environment interaction (G x E) was highly significant for all studied variables, suggesting
that the performance of the genotypes were inconsistent in different environments. AU the
genotypes at Seatondale and Uyole sites yielded higher compared to Inyala site due to low
rainfall amount, temperatures and altitudes existed at Inyala may had contributed to the
lowest performance. Therefore, Seatondale and Uyole are recommended to be the best for
sunflower production. The genotype PI 364860 was identified to be adaptable and stable
on seed yield. Correlation coefficient analysis revealed that seed yield had positive and
significant association with number of seeds per head, head diameter, seed weight per
head and 100 seed weight at both genotypic and phenotypic levels. Path coefficient
analysis indicated that number of seeds per head, 100 seed weight, head diameter and seed
weight per head had maximum positive direct effect on yield and they interrelated
positively through each other. However, number of seeds per head and diameter interacted
positively with most variables in their relations with yield which themselves were the
major contributors of grain yield.
Description
Master of Science in Crop Science
Keywords
Adaptability, Correlation, Path coefficient analysis, Sunflower genotypes, Ilelianthus animus l.