Significant morphometric and genetic differentiation found in coexisting taxa is consistent with reproductive barriers but inconsistent with geographic isolation.
In young female mice, serum levels of estradiol varied considerably in a manner consistent with reproductive cycling (62 ± 123 pg/ml, n = 23).
Therefore, purebred individuals should exhibit stronger patterns of assortative mating in sympatry than in allopatry, a pattern consistent with reproductive character displacement due to reinforcement [ 12, 24, 25].
Behavioral preference was scored if the focal fish entered a preference zone with its full head length and showed behavior consistent with reproductive interest (Table 1).
Moreover, each network, though highly variable in terms of gene membership, is enriched for biological processes related to reproduction, including oogenesis and other functional terms that are consistent with reproduction and reproductive regulation (Table 2).
Data from both crossing trials and behavioural observations indicate a consistent pattern of reproductive isolation among the putative species.
Using single nucleotide polymorphism DNA markers we show that mycorrhizas in both forest age classes in both villages showed high levels of genotypic diversity, consistent with a reproductive life history predominated by outcrossing via basidiospore dispersal.
And if you look at the animal feeding studies with genetically modified Roundup ready crops, there's a consistent theme of reproductive disorders, which we don't know the cause for because follow-up studies have not been done".
(Things are different in the U.S., where the lack of any consistent regulations concerning reproductive technologies permitted the production of three-parent children using a more primitive technique than the two outlined above, which, problematically, resulted in both a high frequency of heteroplasmy and chromosomal anomalies).
Significant genetic and morphological differentiation among co-existing morphotypes is consistent with a reproductive barrier (and difficult to explain by another process).
