INHERITANCE OF SEEDCOTTON YIELD AND LINT TRAITS IN COTTON (Gossypium hirsutum L.)
INHERITANCE OF SEEDCOTTON YIELD AND LINT TRAITS IN COTTON (Gossypium hirsutum L.)
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Date
1983-12
Authors
ECHEKWU, CANDIDUS ALEICHENU
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Abstract
Studies were carried out to investigate the mode
of gene action governing the inheritance of geedcotton
yield, lint yield, lint percent, mean fiber length
and fiber fineness within six intervarietal crosses
of Upland cotton. Polygenic inheritance for these
characters was indicated by unimodality in the F2
distribution in most of the crosses for the traits
studied. There were also apparent indications of the
presence of complementary effects of genes for all these
traits except lint yield as shown by skewness of some
of the F2 distribution.
The fit method of comparing the average of
different generations with a predicted average calculated
from parental and F1 means was used to determine gene
action in the inheritance. Results showed that this
method was not sufficiently discriminatory as a means
of studying the mode of gene action with respect to the
traits evaluated using the available data. However
from visual observation of the F2 distribution, heterosis
pattern and heritability estimates, additive gene effects
appear to be relatively more important than non-additive
effects in the inheritance of seedcotton yield, lint
yield, lint percent and mean fiber length while
dominance gene effects seem to be more important than
additive effects in the inheritance of fiber fineness
There is also an indication of over-dominance at the
coarse level for this character in three out of the
six crosses evaluated.
Description
A thesis submitted to the Postgraduate School,
Ahmadu Bello University
in partial fulfilment of the requirements for
the Degree of Master of Science in Crop Breeding
DEPARTMENT -OF PLANT SCIENCE
FACULTY OF AGRICULTURE
AHMADU BELLO UNIVERSITY
ZARIA, NIGERIA.
Keywords
INHERITANCE,, SEEDCOTTON YIELD,, LINT TRAITS,, COTTON,, (Gossypium hirsutum L.),