Abstract
Abstract: The objective of this work was to evaluate the inheritance of resistance to Cowpea aphid-borne mosaic virus (CABMV) in cowpea (Vigna unguiculata). The study was performed between parental genotypes IT85F-2687 (resistant) and 'BR-14 Mulato' (susceptible), generating F1, F2, and F7 populations and backcrosses with both parental genotypes. CABMV was inoculated on plants from all generations, which were then evaluated through visual inspection and description of characteristic symptoms. A chi-square test was performed after the phenotypic classification of all plants. A segregation proportion of 1:3 (resistant:susceptible) in population F2 and of 1:1 in population F7 was accepted, showing a recessive monogenic inheritance.
Highlights
Cowpea [Vigna unguiculata (L.) Walp.] belongs to the Fabaceae family and is an herbaceous annual crop, grown mainly in dry regions
Cowpea mosaic caused by the Cowpea aphid-borne mosaic virus (CABMV) is a major disease that considerably reduces crop yield, standing out for its worldwide distribution (Barros et al, 2013; Boukar et al, 2019)
The use of resistant varieties is a useful method to manage CABMV, and some genotypes have already been identified in previous studies: IT85F-2687, Patativa, TE97-309G-22, TE97-309G-9, Tvu 379, Tvu 382, Tvu 410, and Tvu 966 (Oliveira et al, 2012; Barros et al, 2013)
Summary
Cowpea [Vigna unguiculata (L.) Walp.] belongs to the Fabaceae family and is an herbaceous annual crop, grown mainly in dry regions. Resumo – O objetivo deste trabalho foi avaliar a herança de resistência ao Cowpea aphid-borne mosaic virus (CABMV) em feijão-caupi (Vigna unguiculata). The experiment was carried out by crossing the IT85F-2687 and 'BR-14 Mulato' parental genotypes (resistant and susceptible to CABMV, respectively), both from Embrapa Meio-Norte and stored in the cowpea germplasm bank of Instituto Agronômico de Pernambuco (IPA) from July 2017 to April 2020.
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