TABLE 1

Collections of Microbotryum and segregation of size-dimorphic autosomes

Diploid
genotypes
No. of
tetrads
First division
segregating
autosomes
Microbotryum var. latifolia
Virginia
    Giles County141
    Giles County220
    Rockingham County1-880
    Shenandoah County1,220
    Albemarle County110
United Kingdom
    Aldeburgh111
    Aldeburgh210
    Hungerford121
    Hungerford210
    Ipswich110
Italy
    Lamole111
    Lamole2,320
    San Gimignano1,220
    Antrodoco110
France
    Orsay110
Germany
    Darmstadt112
Switzerland
    Oetweil110
Czech Republic
    Olomouc111
Microbotryum var. caroliniana
Virginia
    Amherst County1,225
    Princess Anne County112
Kentucky
    Anderson County185
    Jessamine County115
North Carolina
    Franklin County144
  • Diploid genotypes from a locality are combined in a single row where they show identical patterns. Second-division segregation was observed for one autosome of Microbotryum var. latifolia from Darmstadt and from Orsay. Analysis of such variation in Microbotryum var. caroliniana is presented in Table 2. The range of samples from Microbotryum var. caroliniana includes two subspecies of this host: Virginia and North Carolina, ssp. Pensylvanica; Kentucky, ssp. wherryi.