1991), and cryptic species are present when heterogamic crosses are < 75% homogamic ones (Stouthamer et al.
Two intra-population crosses were done (PA m x PA f) and (ES m x ES f) as homogamic controls, as well as one heterogamic inter-population cross (PA mf x ES mf).
It is estimated as 2 percentages that compare levels of female progeny arising from heterogamic mating versus the homogamic control (Pinto et al.
Canela-Ferreira and Sazima (2003) reported self-incompatibility for Aechmea pectinata Baker, a hermaphroditic homogamic
species, inhabitant of the rainforests in southeastern Brazil.
Deviations in favor of homogamic matings are usually taken as evidence of mating discrimination and, therefore, of incipient isolation between the examined strains.
Homogamic matings were in excess in 19 out of the 31 tests, and heterogamic in the remaining 12 tests.
His finding, and the thesis of the book, is that a "high homogamic
tendency" was indeed "at the foundation of the social world" of the Florentine ruling class in the fifteenth and sixteenth centuries (pp.
The ruling class was extraordinarily endogamic (or homogamic
, if you vial).
DI = 0 (W/V = 1) means there is no difference in mating preference between these two types of females and a positive value means that homogamic
matings are more frequent than expected.
When only two types (homogamic versus heterogamic pairs) were taken into account, the factor was significant only in the three crosses involving population M3 (Table 2) and always in the direction of higher offspring fertility in heterogamic pairs (see Table 1).
So, there are three cases where interaction is mainly due to homogamic versus heterogamic matings behaving differently in each generation, whereas in others differences arise between either homogamic (crosses M3 x M25 and BC7 x M25) or heterogamic pairs (BC7 x M3 and M25 x BCA).
where A and D are the numbers of homogamic
matings and B and C the numbers of heterogamic matings.