VARIABILITY ANALYSIS, PHENOTYPIC AND GENOTYPIC CORRELATIONS IN SELECTED GENOTYPES OF SUNFLOWER (Helianthus animus L.)
VARIABILITY ANALYSIS, PHENOTYPIC AND GENOTYPIC CORRELATIONS IN SELECTED GENOTYPES OF SUNFLOWER (Helianthus animus L.)
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Date
1997-07
Authors
ABDULLAHI, YAHAYA
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Abstract
Investigations to determine the phenotypic and genotypic correlations among
12 traits of sunflower (Helianthus annuus L.) were carried out for 2 years, 1992 and
1993 in Samaru, Northern Nigeria. Nine open pollinating sunflower genotypes
collected from different parts of the world were grown in a randomized complete
block design with four replications. Each plot consisted of four rows and the two
inner rows formed the net plot from which various traits were measured and
analysed.
Variations observed within the traits and between the traits were highly
significant. Number of leaves per plant, capitulum diameter, plant height and grain
yield exhibited a high level of variability, indicating the possibility of their
improvement through appropriate breeding procedures.
The correlation studies indicated that there is an ample opportunity for
improving grain yield through its components viz: emergence count, capitulum
diameter, number of leaves per plant, 1000 grain weight, protein content and dry
matter content. Continuous selection for these traits will therefore lead to an
increase in grain yield.
Several of the methods of recurrent selection used for hybrid development eg
S1 selection, full sib and half sib could be applied as breeding strategies to improve
yield and combining ability of populations. A relatively good output of oil and
protein content of the grains was obtained which could be exploited to make up the
prevailing nutritional deficiencies of the society.
A relatively good output of oil and protein content of the grains was obtained
which could be exploited to make up the prevailing nutritional deficiencies of the
society.
Description
A thesis submitted to the Post-Graduate School, Ahmadu Bello University,
Zaria, Nigeria in partial fulfillment of the requirements for the
degree of MASTER OF SCIENCE (CROP BREEDING)
Department of Plant Science,
Faculty of Agriculture,
Ahmadu Bello University, Zaria.
JULY, 1997
Keywords
VARIABILITY,, ANALYSIS,, PHENOTYPIC,, GENOTYPIC,, CORRELATIONS,, SELECTED,, GENOTYPES,, SUNFLOWER,, (Helianthus animus L.)