Cultural Variation WithinTyphula idahoensisandT. ishikariensisand the Species Concept

Genetic Relationships among Typhula ishikariensis Varieties from Wisconsin

“…ishikariensis is incompatible with both varieties, which is a sign that a reproductive barrier might be present. Similar results have been found in interactions among isolates of T. ishikariensis varieties with different origins (Arsvoll and Smith, 1978;Bruehl et al, 1978;Bruehl and Machtmes, 1980;Matsumoto, 1997). Interestingly, however, our result was very different with that of Jung et al (2000), which found that the genetic relationship between T. ishikariensis var.…”

“…canadensis and var. idahoensis favored the more unstable environment (Matsumoto et al, 1982;Chang et al, 2006b), have low growth ability (Bruehl and Machtmes, 1980), and have a limited host range (Matsumoto and Tajimi, 1993) compared with var. ishikariensis.…”

Genetic relationships of pathogenic Typhula species assessed by RAPD, ITS-RFLP and ITS sequencing

“…The most interesting finding involved the relationships among T. ishikariensis varieties. The varieties canadensis and ishikariensis showed high genetic similarity, which supports the contention of Bruehl & Machtmes (1980) that these two taxa are not distinct. Furthermore, based on RAPD data, var.…”

“…canadensis to accommodate a varient widely distributed in Canada. Bruehl & Machtmes (1980) conducted more extensive mating experiments between Typhula isolates, and maintained that T. ishikariensis and T. idahoensis were distinct species. They also rejected T. ishikariensis var.…”

Genetic and biological characteristics ofTyphula ishikariensis isolates from Norway

“…Christen and Bruehl (1979) later found putative hybrids in nature, which mated with both of these two species, and included var. canadensis within the range of variation of T. idahoensis isolates (Bruehl and Machtmes, 1980). Matsumoto et al (1982) identified three groups within Japanese isolates of T. ishikariensis and referred to them as biotypes.…”