Population Structure of the Blueberry Pathogen Monilinia vaccinii-corymbosi in the United States

被引:10
作者
Burchhardt, Kathleen M. [1 ]
Cubeta, Marc A. [1 ]
机构
[1] N Carolina State Univ, Dept Plant Pathol, Raleigh, NC 27695 USA
关键词
MUMMY BERRY BLIGHT; LOWBUSH BLUEBERRY; FRUIT ROT; INFECTION; RESISTANCE; EPIDEMIOLOGY; SOFTWARE; MIMICRY; FUNGUS; DIFFERENTIATION;
D O I
10.1094/PHYTO-03-14-0074-R
中图分类号
Q94 [植物学];
学科分类号
071001 ;
摘要
The fungus Monilinia vaccinii-corymbosi causes disease of blueberry (Vaccinium section Cyanococcus) shoots, flowers, and fruit. The objective of our research was to examine the population biology and genetics of M. vaccinii-corymbosi in the United States. A total of 480 samples of M. vaccinii-corymbosi were collected from 18 blueberry fields in 10 states; one field in Georgia, Massachusetts, Maine, Michigan, Mississippi, New Jersey, New York, Oregon, and Washington and nine fields in North Carolina. Analysis with 10 microsatellite markers revealed 247 unique multilocus haplotypes (MLHs), with 244 MLHs detected within 11 fields in the Northeast, Northwest, Midwest, and Southeast and three MLHs detected within seven fields in the Southeast United States. Genetic similarity and low genetic diversity of M. vaccinii-corymbosi isolates from the seven fields in the Southeast United States suggested the presence of an expansive, self-fertile population. Tests for linkage disequilibrium within 10 fields that contained >= 12 MLHs supported random mating in six fields and possible inbreeding and/or selffertilization in four fields. Analysis of molecular variance, discriminate analysis of principal components, and Bayesian cluster analysis provided evidence for population structure and restricted gene flow among fields. This research represents the first comprehensive investigation of the genetic diversity and structure of field populations of M. vaccinii-cormbosi.
引用
收藏
页码:533 / 541
页数:9
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