VARIABILITY ANALYSIS OF THREE SYNTHETIC POPULATIONS OF NIGERIAN PEARL MILLET (Pennisetum americanum (L.) Leeke) AND IMPLICATIONS IN CROP IMPROVEMENT

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Date
2000-10
Authors
YEYE, MARY Y.
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Abstract
Three synthetic populations originally from the Nigerian germplasm collections were evaluated for variability in 9 traits using a simple 9 x 9 lattice design. Mean performance differed significantly in the two years of evaluation for some traits, while some means were not significantly different in the two years. Expression of all the characters exhibited a wide range among the the populations, though the coefficients of variation were generally low, a range of 10.52% -16.513% being the highest in the populations, observed for plant height. The phenotypic variance was consistently higher than the genotypic variance across the populations for all the traits, and by far, error was the largest variance component for all the traits. Broad sense heritability estimates were low to high (29.667% to 86.357%); but the accompanying genetic advance was very low. Expressed as a percentage of mean, the highest estimate was 4.91% obtained for grain yield. All correlation coefficients were positive in populations 1 and 2, with a few negative associations observed in population 3. For most of the associations, the genotypic correlation coefficients were slightly higher than the corresponding phenotypic correlation coefficients.
Description
A dissertation Submitted to the Postgraduate School, Ahmadu Bello University, Zaria, in Partial fulfilment of the Requirement for the degree of Doctor of Philosophy in Crop Breeding Department of Plant Science Faculty of Agriculture Ahmadu Bello University, Zaria, Nigeria October, 2000
Keywords
VARIABILITY,, ANALYSIS,, SYNTHETIC,, POPULATIONS,, NIGERIAN PEARL MILLET,, Pennisetum americanum,, IMPLICATIONS,, CROP IMPROVEMENT
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http://hdl.handle.net/123456789/2667
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AGRICULTURE