Genetic variability and interrelationships among earliness characters, yield-related traits and fiber quality parameters in certain cotton genotypes | [electronic resource]
Salem, Tarek S. G.
Genetic variability and interrelationships among earliness characters, yield-related traits and fiber quality parameters in certain cotton genotypes [electronic resource] التباين الوراثي والعلاقات المتبادلة بين صفات التبكير، صفات المحصول ومقاييس جودة الألياف في بعض التراكيب الوراثية في القطن - p. 967-974.
Includes bibliographic reference
This study aimed at assessing genotypic variability among six cotton genotypes and their 15 F1 crosses,
clarifying the relationship between cotton yield and important agronomic traits, and determining the amount of
direct and indirect impacts of attributed traits on cotton yield. Six long-staple and high-yielding cotton
genotypes and their 15 F1 crosses were evaluated in the summer season of 2017 at the Experimental Farm of
Sids Research Station, Beni-Suef, Egypt. The obtained results revealed highly significant differences among
parental genotypes and their F1 crosses for all evaluated traits. The phenotypic coefficient of variation
(PCV) was greater than the genotypic coefficient of variation (GCV) for all studied traits. The difference
between PCV and GCV was very low for days to first flower unfolding, days to first opened boll, and uniformity
ratio, while was relatively higher for number of nodes to first sympodial branch, lint index, micronaire reading,
fiber strength, 100-seed weight, seed yield/plant, and lint yield/plant. The heritability in broad sense (h2b)
values were high for days to first flower unfolding, days to first opened boll. Moreover, number of opened bolls/plant
and boll weight/plant had positive and significant genotypic and phenotypic correlation with seed yield/plant
and lint yield/plant. Furthermore, number of opened bolls/plant, boll weight/plant, and 100-seed weight exhibited
positive direct effect on seed cotton yield. The highest indirect effects on seed cotton yield were assigned for
number of opened bolls/plant, boll weight/plant, 100-seed weight, lint percentage, and lint index through lint yield/plant.
The obtained results provide valuable information for cotton breeding programs to develop new high-yielding genotypes with
acceptable fiber quality parameters.
Key words: Cotton, genetic variability, genotypic and phenotypic coefficients of variation,
genotypic and phenotypic correlation coefficients and path analysis.
Summary in Arabic
Cotton--Genetics .
Cotton--Morphology
Genetic variability and interrelationships among earliness characters, yield-related traits and fiber quality parameters in certain cotton genotypes [electronic resource] التباين الوراثي والعلاقات المتبادلة بين صفات التبكير، صفات المحصول ومقاييس جودة الألياف في بعض التراكيب الوراثية في القطن - p. 967-974.
Includes bibliographic reference
This study aimed at assessing genotypic variability among six cotton genotypes and their 15 F1 crosses,
clarifying the relationship between cotton yield and important agronomic traits, and determining the amount of
direct and indirect impacts of attributed traits on cotton yield. Six long-staple and high-yielding cotton
genotypes and their 15 F1 crosses were evaluated in the summer season of 2017 at the Experimental Farm of
Sids Research Station, Beni-Suef, Egypt. The obtained results revealed highly significant differences among
parental genotypes and their F1 crosses for all evaluated traits. The phenotypic coefficient of variation
(PCV) was greater than the genotypic coefficient of variation (GCV) for all studied traits. The difference
between PCV and GCV was very low for days to first flower unfolding, days to first opened boll, and uniformity
ratio, while was relatively higher for number of nodes to first sympodial branch, lint index, micronaire reading,
fiber strength, 100-seed weight, seed yield/plant, and lint yield/plant. The heritability in broad sense (h2b)
values were high for days to first flower unfolding, days to first opened boll. Moreover, number of opened bolls/plant
and boll weight/plant had positive and significant genotypic and phenotypic correlation with seed yield/plant
and lint yield/plant. Furthermore, number of opened bolls/plant, boll weight/plant, and 100-seed weight exhibited
positive direct effect on seed cotton yield. The highest indirect effects on seed cotton yield were assigned for
number of opened bolls/plant, boll weight/plant, 100-seed weight, lint percentage, and lint index through lint yield/plant.
The obtained results provide valuable information for cotton breeding programs to develop new high-yielding genotypes with
acceptable fiber quality parameters.
Key words: Cotton, genetic variability, genotypic and phenotypic coefficients of variation,
genotypic and phenotypic correlation coefficients and path analysis.
Summary in Arabic
Cotton--Genetics .
Cotton--Morphology