Sources of resistance to Pseudocercospora fijiensis, the cause of black Sigatoka in banana

Abstract

Bananas are perennial monocot herbs belonging to the genus Musa, family Musaceae and order Zingiberales (Simmonds & Shepherd, 1955). The genus Musa comprises five sections that are divided into 40 species. Eumusa is the largest and best characterized section and includes two seeded species, Musa acuminata and M. balbisiana, which are the ancestors to most edible banana cultivars (Simmonds & Shepherd, 1955). Some varieties are also believed to have arisen from the hybridization of M. schizocarpa (S genome) with either M. acuminata or M. balbisiana. Recent studies revealed evidence of diversification within wild M. acuminata subspecies and intraspecific hybridization within the M. acuminata subspecies malaccensis and burmannica (Rouard et al., 2018). Southeast Asia and Indochina are the centres of diversity for banana and the region where bananas originated.Banana is an important crop in the tropics and subtropics, and is a major staple and source of income to millions of people (FAOSTAT, 2016). Despite their importance, yields in small-scale production systems are often low due to abiotic and biotic stresses. One of the most destructive biotic stresses of banana is black Sigatoka, a fungal leaf disease caused by Pseudocercospora fijiensis (Churchill, 2011).

Continuous Mapping Identifies Loci Associated With Weevil Resistance [Cosmopolites sordidus (Germar)] in a Triploid Banana Population

“…The resistant genotypes in this study should be further investigated for their male and female fertility, agronomic characteristics, and their response to other pests and diseases common in bananas, such as nematodes, black Sigatoka, fusarium wilt, and banana bacterial wilt. In separate studies, “Monyet” and “Kokopo” have been found contrasting in terms of their response to black Sigatoka (caused by Pseudocercospora fijiensis ) ( Kimunye et al, 2021 ), banana bacterial wilt (caused by Xanthomonas vesicola pv. musacearum ) ( Nakato et al, 2019 ), and to banana fusarium wilt (caused by Fusarium oxysporum f. sp.…”

Genetic Characteristics and Metabolic Interactions between Pseudocercospora fijiensis and Banana: Progress toward Controlling Black Sigatoka

“…The use of resistant banana cultivars would provide an environmentally friendly means of black Sigatoka control. Active breeding efforts are ongoing at research institutes in Africa, Asia, and South and Central America [ 2 , 34 ]. Resistant varieties of diverse cultivars and types of bananas have been developed that are used in breeding programs and, to a limited extent, grown commercially [ 2 , 35 ].…”

“…Although conventional breeding for resistance is difficult and labor intensive due to the sterility of edible banana cultivars, successful crosses have been achieved by international research institutes, and black-Sigatoka-resistant dessert bananas, cooking bananas, and plantain varieties have all been developed [ 2 , 34 , 39 ]. One of the difficulties faced has been the breakdown of resistance, due to the limited sources of resistance used in breeding efforts [ 34 , 40 ]. The problem of resistance loss led Kimunye et al to screen banana accessions to identify additional sources of resistance [ 34 ].…”

“…One of the difficulties faced has been the breakdown of resistance, due to the limited sources of resistance used in breeding efforts [ 34 , 40 ]. The problem of resistance loss led Kimunye et al to screen banana accessions to identify additional sources of resistance [ 34 ]. Development of resistant cultivars based on diverse sources of resistance genes is needed to help manage black Sigatoka disease.…”

Analysis of agro-morphological diversity among plantains (Musa species AAB) in Benin Republic, West Africa

“…are native to Southeast Asia (Blomme et al, 2013;Lescot 2010). Apart from the high diversity of local cultivars, attempts to solve pest problems related to plantain production have led to developing new hybrid varieties through breeding programs (Dochez et al, 2013;Kimunye et al, 2021;Tenkouano et al, 2019), while increasing the diversity of plantain varieties (Ortiz and Swennen, 2014). In this regard, data recorded on some cultivars cannot automatically be generalized to all available plantains, due to the lack of the right taxonomic and agro-morphological description of the wide diversity of plantains (Adheka et al, 2018).…”