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Abstract
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Article Information:
Generation Means Analysis of Seed Sucrose Content in Cowpea (Vigna unguiculata L. Walp.)
J.B. Noubissie Tchiagam, E. Youmbi, N.Y. Njintang, J.M. Bell and A. Nassourou Maina
Corresponding Author: NOUBISSIE TCHIAGAM Jean Baptiste
Submitted: 2011 August, 11
Accepted: 2011 October, 07
Published: 2011 November, 15 |
Abstract:
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The sucrose concentration of seeds is an important component of the taste in cowpea (Vigna
unguiculata L. Walp.). The objective of this research was to estimate the heritability, to investigate the mode
of genetic control and to evaluate the potential for genetic improvement of sucrose content in cowpea using
generation’s means analysis. F1 and F2 generations as well as backcross populations (BCP1 and BCP2) were
produced in three hybrid combinations by crosses of four selected cultivars. The sucrose level was measured
via a High Performance Liquid Chromatography (HPLC) system. The range of variation in sucrose content
among tested varieties was from 1.88 mg/g (Lori) to 5.32 mg/g (C93W-24-125). Broad-sense heritability (h2)
was of a moderate 58.50% to high 68.12% value and no transgressive segregation was observed. Narrow-sense
heritability (39.47 to 47.83%) and heterosis (-20.00 to - 5.94%) values and gene effects analysis suggested that
the sucrose content is controlled by additive and non-additive genes. At 10% level of selection, an increase of
19.60 to 33.64% was predicted after one cycle. Epistasis was significant in most of crosses and at least five
genes affected the sucrose accumulation in cowpea seeds. These results suggested that breeding for increased
sucrose content in the seeds of cowpea can be quite successful through recurrent selection in later generations.
Key words: Genetic improvement, heritability, sweet flavour, Vigna unguiculata, , ,
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Cite this Reference:
J.B. Noubissie Tchiagam, E. Youmbi, N.Y. Njintang, J.M. Bell and A. Nassourou Maina, . Generation Means Analysis of Seed Sucrose Content in Cowpea (Vigna unguiculata L. Walp.). Asian Journal of Agricultural Sciences, (6): 475-480.
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ISSN (Online): 2041-3890
ISSN (Print): 2041-3882 |
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