Frequent shifts in Aspergillus flavus populations associated with maize production in Sonora, Mexico
Ortega-Beltran, A; Cotty, P
| HERO ID | 4121704 |
|---|---|
| In Press | No |
| Year | 2017 |
| Title | Frequent shifts in Aspergillus flavus populations associated with maize production in Sonora, Mexico |
| Authors | Ortega-Beltran, A; Cotty, P |
| Journal | Phytopathology |
| Abstract | Aspergillus flavus frequently contaminates maize, a critical staple of billions, with aflatoxins. Diversity among A. flavus L morphotype populations associated with maize in Sonora, Mexico was assessed and a total of 869 isolates from 83 fields were placed into 136 vegetative compatibility groups (VCGs) using nitrate-nonutilizing mutants. VCG diversity indices did not differ in four agroecosystems (AES) but diversity significantly differed among years. Frequencies of certain VCGs changed manyfold over single years in both multiple fields and multiple AES. Certain VCGs were highly frequenct (>1%) in 2006, but frequencies declined repeatedly in each of the two subsequent years. Other VCGs that had low frequencies in 2006 increased in 2007 and subsequently declined. None of the VCGs were consistently associated with any AES. Fourteen VCGs were considered dominant in at least a single year. However, frequencies often varied significantly among years. Only 9% of VCGs were detected all three years while 66% were detected in only one year. Results suggest that the most realistic measurements of both genetic diversity and the frequency of A. flavus VCGs are obtained by sampling multiple locations in multiple years. Single season sampling in many locations should not be substituted for sampling over multiple years. |
| Doi | 10.1094/PHYTO-08-17-0281-R |
| Pmid | 29027887 |
| Wosid | WOS:000427393900011 |
| Is Certified Translation | No |
| Dupe Override | No |
| Is Public | Yes |
| Language Text | English |