The mean introgression rates and numbers of hybrids are presented in Fig. 1, Tables S1 and S2.
For example, in three hybrid zones of wild sunflowers (Helianthus), the average frequencies of introgression across chromosomes with rearrangements were about 50% lower than those across syntenic chromosomes [9].
It carried a homozygous introgression across the entire qBRR-10 region, but without any introgression across qBRR-1, qBRR-8 and qBRR-9 regions on chromosomes 1, 8, and 9, respectively (Fig. 4a and b).
The ultimate outcome of hybridization could therefore be a complex mosaic of genetic introgression across the landscape, depending on the distribution of hemlock and pine.
It contained a small amount of TN1 DNA in its genetic background, and carried a homozygous introgression across the entire qBRR-10 region and without any introgression across qBRR-1, qBRR-8 and qBRR-9 regions on chromosomes 1, 8, and 9 respectively.
Genomic studies allow us to characterise the landscape of introgression across the genome, shedding light on both its adaptive benefits and the incompatibilities that help to maintain species barriers.
Alternatively, selectively neutral mechanisms may also drive mitochondrial introgression across species boundaries.
We have explored the implications of sex-specific interspecific incompatibility for neutral introgression across the genome.
The extent of organelle transfer and nuclear introgression across contact zones of long-separated subsect.
A third possibility is that a stable hybrid zone will form, with limited introgression across the zone.
