Furthermore, divergent genomic regions display signatures of both selection and adaptive introgression, demonstrating the link between microevolutionary processes acting within species and the origin of species across macroevolutionary timescales.
Therefore, diversity at this marker showed patterns of both natural selection and introgression.
Mapping studies using the hybrid system should allow understanding of superior traits in both species to facilitate genome-based selection and introgression strategies.
At the simplest level, it allows for association of genetic markers for selection and introgression of traits across germplasm to enable hypothesis-driven crop improvement by understanding the pathways and development of novel products for consumers.
While the relationships between the earliest domesticates and indigenous landraces surviving in rice-growing regions today are still unclear, signatures of shared ancestry, selection, and introgression are written in the genomes of traditional varieties.
Thus, tests of the relationship between genetic divergence, selection, and introgression are required.
While incompatibility selection may derive from disruption of deme-specific ensembles of interacting loci formed during past episodes of selective sweeps, the present genomic state is nontransient, maintained by a balance between negative selection and introgression.
Traditional plant breeding relies on the discovery, phenotypic selection, and introgression of desirable traits to develop superior cultivars (e.g., with improved agronomic traits, pest and disease resistance, abiotic stress tolerance).
These new varieties can then be used for further selection and introgression of desirable genes from diverse germplasm into the available genetic base (Smith, 1984; Cox et al., 1986; Mohammadi and Prasanna, 2003).
Furthermore, we detect a longstanding increased plasticity of immune gene splicing, and show that positive selection and Neanderthal introgression have both contributed to diversify the splicing landscape of human populations.
