02128naa a2200241 a 450000100080000000500110000800800410001902400430006010000160010324501040011926000090022352013970023265000240162965000200165365000210167365300210169465300230171570000230173870000190176170000230178070000170180377300660182021251832020-10-07       2013    bl uuuu     u00u1 u    #d7 ahttps://10.1007/s13313-013-0213-32DOI1 aMAIA, T. A.  aThe population structure of Hemileia vastatrix in Brazil inferred from AFLP.h[electronic resource]  c2013  aEfforts to obtain durable resistant cultivars to coffee leaf rust have a long history of disappointment because of the lack of information on the Hemileia vastatrix evolutionary potential. In this study, the AFLP marker was used to analyze the genetic structure of a field population of H. vastatrix from different coffee genotypes cultivated in a wide geographic region of Brazil?s main production areas. A total of 91 isolates were sampled from genotypes of Coffea arabica, C. canephora and Híbrido de Timor/Icatu derivatives. Each isolate exhibited unique multilocus AFLP genotypes with no identical isolates obtained from the same geographical and host origins. This finding was corroborated by a small correlation between genetic similarity and geographic distance (Rxy=0.31, P=0.23). The analyses showed a low genetic differentiation (GST=0.026) between the populations defined by a host and AMOVA analysis, most of the genetic variance (99.56 %) was attributed to differences within populations. In addition, based on the index of association (IA), the random mating possibility was not rejected (IA=0.225, P=0.123) for the population of H. vastatrix derived from C. canephora. This result suggested that H. vastatrix in Brazil behaves as a large undifferentiated population with a high level of genotypic diversity that is unstructured with regard to its geographic and host origins.  aPopulation genetics  aCoffea Arábica  aCoffea Canephora  aCoffee leaf rust  aDurable resistance1 aMACEL-ZAMBOLIM, E.1 aCAIXETA, E. T.1 aMIZUBUTI, E. S. G.1 aZAMBOLIM, L.  tAustralasian Plant Pathologygv. 42, n. 5 , p. 533-542, 2013.