Indian Society of Genetics & Plant Breeding

Linkage of genes for anthocyanin and chlorophyll pigmentation in cowpea [Vigna unguiculata (L.) Walp.]

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The inheritance of anthocyanin and chlorophyll
pigmentation of various vegetative and pod characters
were studied in cowpea
[Vigna unguiculata (L.) Walp]
cross P-737-2
x V-23. One to three pairs of genes were
responsible for inheritance of these characters. Monogenic
ratio of 3 : 1 was observed for both pigmentation of pod
tip and surface and pod streak. Duplicate ratio of 15 : 1
and trigenic duplicate ratio of 63 : 1 were obtained for
pigmentation on peduncle tip and unripe pod colour
respectively, while pigmentation on stipules and peduncle
surface were controlled by any two of the three
complementary genes and two threshold dominant genes
giving F2 ratios of 54 : 10 and 11 : 5 respectively.
Pleiotropy and differential gene action were established
among pigmentation on peduncle surface, stipules and
unripe pod colour. Pigmentation on peduncle surface
(Pgpls) was linked with peduncle tip (Pgpit), surface
(Pgplts) and pod streak (Pst) with recombination value of
33.10, 43.71 and 38.41 per cent respectively. Pgplti was
proved to be linked to four gene linkage group and Pgplt2
was linked to Gnp which belonged to separate two genes
linkage group

Keywords: Cowpea, linkage, anthocyanin and chlorophyll pigmentation, Vigna unguiculata


Year: 2005
Volume: 65
Issue: 3
Article DOI: NA
Print ISSN: 0019-5200
Online ISSN: 0975-6906



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