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Fine-Scale Genetic Structure of Monilinia fructicola During Brown Rot Epidemics Within Individual Peach Tree Canopies

, : Fine-Scale Genetic Structure of Monilinia fructicola During Brown Rot Epidemics Within Individual Peach Tree Canopies. Phytopathology 105(4): 542-549

The purpose of this study was to determine the fine-scale genetic structure of populations of the brown rot pathogen Monilinia fructicola within individual peach tree canopies to better understand within-tree plant pathogen diversity and to complement previous work on spatiotemporal development of brown rot disease at the canopy level. Across 3 years in a total of six trees, we monitored disease development, collected isolates from every M. fructicola symptom during the course of the season, and created high-resolution three-dimensional maps of all symptom and isolate locations within individual canopies using an electromagnetic digitizer. Each canopy population (65 to 173 isolates per tree) was characterized using a set of 13 microsatellite markers and analyzed for evidence of spatial genetic autocorrelation among isolates during the epidemic phase of the disease. Results showed high genetic diversity (average uh=0.529) and high genotypic diversity (average D=0.928) within canopies. The percentage of unique multilocus genotypes within trees was greater for blossom blight isolates (78.2%) than for fruit rot isolates (51.3%), indicating a greater contribution of clonal reproduction during the preharvest epidemic. For fruit rot isolates, between 54.2 and 81.7% of isolates were contained in one to four dominant clonal genotypes per tree having at least 10 members. All six fruit rot populations showed positive and significant spatial genetic autocorrelation for distance classes between 0.37 and 1.48 m. Despite high levels of within-tree pathogen diversity, the contribution of locally available inoculum combined with short-distance dispersal is likely the main factor generating clonal population foci and associated spatial genetic clustering within trees.


PMID: 25317843

DOI: 10.1094/PHYTO-03-14-0088-R

Other references

Wallis, Ol, 1971: Establishing underwater parks worldwide. Transactions Nildl. nat. Resour. Conf: 97-117.

Willuhn, G.K.esken, J1; Wendisch, D., 1983: Sesquiterpene lactones from Arnica chamissonis. III. 4-O-acetyl-6-desoxychemassonolide and 6-O-propionyl-11,13-dihydrohelenalin Arnica chamissonis subsp. foliosa, Arnica chamissonis subsp. foliosa var. incana.1. Planta medica = journal of medicinal plant research 47(3): 157-160

Bruinenberg, P.G.; de Vos, W.M.; Siezen, R.J., 1994: Prevention of C-terminal autoprocessing of Lactococcus lactis SK11 cell-envelope proteinase by engineering of an essential surface loop. The catalytic domain of the cell-envelope proteinase from Lactococcus lactis SK11 has various inserts, situated in external loops of the catalytic domain, compared with the related subtilisins. Protein engineering was employed to analyse the neces...

Smith, P.F.; Henrikson, C.V., 1966: Growth inhibition of Mycoplasma by inhibitors of polyterpene biosynthesis and its reversal by cholesterol. Smith, Paul F. (University of South Dakota, Vermillion), and Carl V. Henrikson. Growth inhibition of Mycoplasma by inhibitors of polyterpene biosynthesis and its reversal by cholesterol. J. Bacteriol. 91:1854-1858. 1966.-Compounds which inhibit en...

Engelmann, C., 1951: Beitrage zum Gedachtnis des Huhns, pp 110-121 Uber die Beliebthcit einiger Grunfutter-pflanzen beim Huhn, pp 121-132. Zeitschrift fuer Tierpsychologie, 8

Rasmussen, P., 1968: The role of bone tissue in calcium homeostasis. Den Norske Tannlaegeforenings Tidende 78(10): 713-725

Vaĭnberg, M.Sh., 1991: Studies on the terminology of radiation therapy. Meditsinskaia Radiologiia 36(11): 52-53

Ding, L.; Wang, Y.; Kreuzer, M.; Guo, X.; Mi, J.; Gou, Y.; Shang, Z.; Zhang, Y.; Zhou, J.; Wang, H.; Long, R., 2014: Seasonal variations in the fatty acid profile of milk from yaks grazing on the Qinghai-Tibetan plateau. An experiment was conducted to study the seasonal changes in the fatty acid profile of milk from yaks (Bos grunniens) when kept at altitudes of 3000 m above sea level (a.s.l.) and higher. Data and samples were collected in summer (July), autumn (...

Sidor-Smaga, M.N., 1978: Tuberculin reactions in guinea pigs injected with virulent and avirulent tubercle bacilli. Pneumonologia Polska 46(4): 265-276

Mbap S.T.; Ngere L.O., 1991: Breed and environmental factors affecting the performance of some imported and crossbred cattle in ibadan nigeria. The productivities of German Brown (GB) and German Holstein (GH) cattle and crosses with N'Dama in the Ibadan area of Nigeria were assessed, along with studies of environmental factors affecting productivity, between 1969 and 1982. Average la...