Measuring Immigration and Sexual Reproduction in Field Populations of Mycosphaerella graminicola
نویسندگان
چکیده
منابع مشابه
Measuring Immigration and Sexual Reproduction in Field Populations of Mycosphaerella graminicola.
ABSTRACT A field experiment was conducted to determine the relative contributions of immigration and sexual reproduction to the genetic structure of Mycosphaerella graminicola populations during the course of an epidemic. The genetic structure of M. graminicola populations sampled from wheat plots inoculated artificially with 10 isolates was compared with control plots infected naturally by air...
متن کاملSexual reproduction plays a major role in the genetic structure of populations of the fungus Mycosphaerella graminicola.
The relative contributions of sexual and asexual reproduction to the genetic structure of populations can be difficult to determine for fungi that use a mixture of both types of propagation. Nuclear RFLPs and DNA fingerprints were used to make indirect and direct measures of departures from random mating in a population of the plant pathogenic fungus Mycosphaerella graminicola during the course...
متن کاملFrequency of Sexual Reproduction by Mycosphaerella graminicola on Partially Resistant Wheat Cultivars.
ABSTRACT The frequency of sexual reproduction has a profound effect on the population structure and the adaptive potential of a facultatively sexual parasite. Little is known about the relationship of quantitative host resistance to the frequency of sex in pathogens. We sampled over 5,000 fungal fruiting bodies from eight different wheat cultivars over a 3-year period. The cultivars possessed v...
متن کاملFrequency of sexual recombination by Mycosphaerella graminicola in mild and severe epidemics.
The importance of sexual recombination in determining fungal population structure cannot be inferred solely from the relative abundance of sexual and asexual spores and reproductive structures. To complement a previously reported study of proportions of Mycosphaerella graminicola ascocarps and pycnidia, we investigated the share of sexual recombinants among isolates randomly derived from the sa...
متن کاملQoI resistance emerged independently at least 4 times in European populations of Mycosphaerella graminicola.
BACKGROUND QoI fungicides or quinone outside inhibitors (also called strobilurins) have been widely used to control agriculturally important fungal pathogens since their introduction in 1996. Strobilurins block the respiration pathway by inhibiting the cytochrome bc1 complex in mitochondria. Several plant pathogenic fungi have developed field resistance. The first QoI resistance in Mycosphaerel...
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ژورنال
عنوان ژورنال: Phytopathology®
سال: 1998
ISSN: 0031-949X,1943-7684
DOI: 10.1094/phyto.1998.88.12.1330