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Heritability and gene action of cowpea (Vigna unguiculata) resistant to pod stucking bug Clavigmlln tomentosicollis

Indian Agricultural Research Journals

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Title Heritability and gene action of cowpea (Vigna unguiculata) resistant to pod stucking bug Clavigmlln tomentosicollis
 
Creator OGBAJI, M I
OBASI, M 0
 
Subject Cowpea; Clavigralla tomentosicollis; Pod evaluation index; Heritability
 
Description An experiment was conducted during 2003 and 2004 to estimate the gene action and heritability in cowpea (Vigna unguiculata (L.) Walp) resistance to Clavigralla ton~erztosicollis( Stal.). Five cultivars ('TVu745', 'TVu2562', 'IT87D- 979-1 ', 'TVu10224') 'TVu9.525' and 2 susceptible varieties ('13843-2246', 'IT84E-124') were used. Crosses were made between the resistant and susceptible cultivarsto obtain F,, F,, F,,BCP,,and BCP, generations. Generation mean analysis was done on pod evaluation index which measures the level of resistance o;susceptibility of the plants using their podload and pod damage. Majority of the crosses exhibited significant additive and dominance gene effects in the joint scaling test on pod evaluation index. Broad sense heritability estimates for pod evaluation index were generally higher than the narrow sense estimates. There was no correlation between pod evaluation index and yield components like the number of seedsfpod, 100-seed weight and pod wall thickness suggesting that these yield parameters may not have contributed significantly to the resistance of cowpea to this pest. 
 
Publisher The Indian Journal of Agricultural Sciences
 
Contributor —
 
Date 2011-01-10
 
Type info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
 
Format application/pdf
 
Identifier http://epubs.icar.org.in/ejournal/index.php/IJAgS/article/view/3202
 
Source The Indian Journal of Agricultural Sciences; Vol 76, No 10 (2006)
0019-5022
 
Language eng
 
Relation http://epubs.icar.org.in/ejournal/index.php/IJAgS/article/view/3202/1256
 
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