Abstract
During the spring of 2014, a wide survey was conducted in one of the most important mango (Mangifera indica) cultivating areas located in Minas Gerais State (Brazil) to ascertain the causal agent of severe anthracnose infections and to evaluate disease susceptibility within a world collection of mango germplasm. Overall, 86 cultivars were monitored and 152 fungal isolates recovered from infected samples were identified by morphological characterization, DNA sequencing and phylogenetic analyses. All isolates were identified as Colletotrichum asianum. Under natural disease pressure, it has been possible to ascertain a variable tolerance degree within the germplasm collection. By applying a categorized classification, cultivars were classified as follows: 10 highly sensitive (11.6%), 13 sensitive (15.1%), 18 moderately sensitive (20.9%), 23 moderately tolerant (26.7%), 11 tolerant (12.8%), and 11 highly tolerant (10.4%). The most susceptible cultivars to anthracnose were Ubà, Quinzenga, Amarelinha da Sementeira followed by Aroeira and Correjo, whereas Mallika followed by Ourinho and Lita resulted in the least susceptible cultivars. To the authors’ knowledge, this is the first large-scale evaluation of mango susceptibility to C. asianum infections within a wide number of cultivars. Anthracnose is a serious threat to mango production and assessment of cultivar response to disease could be useful in breeding programs.
Highlights
Mango (Mangifera indica L.) is the predominant tropical fruit in the world being cultivated in more than one hundred countries and accounting for more than half of global major tropical fruit production [1]
All these characteristics are in accordance to those reported for C. asianum [33]
We present the first data on the evaluation of susceptibility to anthracnose leaf infections an important mango germplasm collection of southeastern
Summary
Mango (Mangifera indica L.) is the predominant tropical fruit in the world being cultivated in more than one hundred countries and accounting for more than half of global major tropical fruit production [1]. About 80% of global production is concentrated in nine nations. 7th largest producer in the world [2]. Mango is sometimes referred to as the king of the fruits, due to its eye-catching color, pleasant taste, the existence of higher concentrations of carotenoids, ascorbic acid and phytochemicals [3]. About 80% of the commodity is consumed as such; while 20% is processed into value-added products, such as mango puree, nectar, pickles, chutneys and canned products [4]. Infections caused by several pathogen species belonging to the Colletotrichum genus
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