Population structure of Monosporascus cannonballus isolated from melons produced in Northeastern Brazil based on mycelial compatibility groups - doi: 10.4025/actasciagron.v35i2.15182

Acta Scientiarum: Agronomy

Josep Armengol¹  Marcos Paz Saraiva Câmara²  Kamila Câmara Correia²  Cíntia Souza Bezerra²  Sami Jorge Michereff²  Rui Sales Junior³ 

[1] Universidad Politécnica de Valencia;Universidade Federal Rural de Pernambuco;Universidade Federal Rural do Semi-Árido;

关键词: Cucumis melo;    melon;    vine decline;    soilborne pathogen;    genetic diversity;   

DOI  :  10.4025/actasciagron.v35i2.15182

来源: DOAJ

【 摘 要 】

The population structure of Monosporascus cannonballus, which causes vine decline in melons, was assessed based on the determination of mycelial compatibility groups (MCGs) in a collection of 58 isolates obtained from seven melon fields in three municipalities of NortheasternBrazil. For comparison, an additional 11 isolates of M. cannonballus from Spain were included in the analysis. MCGs were determined through comparisons of paired isolates growing on PDA culture media in the dark at 30ºC in various combinations. The Brazilian isolates were assigned into four MCGs: MCG-1 (n = 35 isolates), MCG-2 (n = 20), MCG-3 (n = 2), and MGC-4 (n = 1). MCG-1 and MCG-2 included isolates from all surveyed areas. The Spanish isolates were assigned into six different MCGs, and none of them were compatible with the Brazilian isolates. The genetic structure was determined using the frequencies of MCGs and genotypic diversity indices. The maximum genotypic diversity was 6.9 and 54.5% for the Brazilian and Spanish populations, respectively. The low level of genetic diversity in the M. cannonballus population from Northeastern Brazil suggests that breeding melons for disease resistance may be a promising strategy for the region.

【 授权许可】

Unknown