Indirect selection for resistance to Alectra vogelii (benth) infestation in cowpea (Vignaunguiculata (L) walp)

Indirect selection for resistance to Alectra vogelii (benth) infestation in cowpea (Vignaunguiculata (L) walp)



Mbwando. A., Tembo. L., Lungu D. M, Tryphone G. M



Alectra vogelii (benth) is a parasitic weed which
causes significant yield reductions in cowpeas (VignaunguiculataWalp) in
most of the sub-Saharan African countries. The objective of this study
was to establish the effect of Alectra vogelii infestation on yield
components of cowpea and the prospects of utilizing these components for
indirect select to A. vogelii in resistance breeding. Seven genotypes
of cowpea were crossed in all possible combinations without reciprocals
and their 21 F2 progeny including parents were evaluated for reaction to
Alectra vogelii infection at two locations, Ilonga and Hombolo. The
experiments were laid using a Randomized Complete Block Design with
three replications. Significant (P < 0.001) genotypic responses to
Alectra emergency and infestation were found. A significance negative
correlation was found between the Alectra emergency and infestation to
yield and yield components (P< 0.01 and P< 0.001). However, both
yield components (Number of pods per plant and 100 seed weight) tested
exhibited a weak r2 value (< 0.25) implying that these components can
only be used to supplement and not as a substitute to direct selection
in breeding for resistance to A. vogelii. 



10.22161/ijeab/2.3.15



http://ijeab.com/upload_document/issue_files/15%20IJEAB-FEB-2017-45-Indirect%20selection%20for%20resistance%20to%20Alectra%20vogelii%20(benth).pdf



http://ijeab.com/submit-paper/

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