K. L. Ostevik

High homozygosity of inversions in sunflower species largely averts accumulation of deleterious mutations

This study examines recombination, transposable elements, and deleterious mutations in sunflower species, finding that inversion homozygosity reduces mutation accumulation.

Contrasting selection at multiple life stages maintains divergent adaptation between sunflower ecotypes

The paper examines how selection at different life stages maintains divergent adaptation between two sunflower ecotypes using demographic models and genome-wide data.

Morning glory species co-occurrence is associated with asymmetrically decreased and cascading reproductive isolation

The paper investigates how asymmetric gene flow between morning glory species affects reproductive barrier strength, finding that introgression decreases barriers in the recipient species and impacts within-species compatibility.

Ancestral reconstruction of sunflower karyotypes reveals non-random chromosomal evolution

The paper reconstructs ancestral sunflower karyotypes and finds a high rate of chromosomal rearrangement with non-random translocations contributing to hybrid sterility.

Multiple chromosomal inversions contribute to adaptive divergence of a dune sunflower ecotype

The paper identifies seven chromosomal inversions in a dune sunflower ecotype that contribute to adaptive divergence and incipient speciation by associating with environmental variables and islands of differentiation.

Massive haplotypes underlie ecotypic differentiation in sunflowers

The paper identifies large haplotype blocks associated with ecotypic differentiation in sunflowers, showing how structural variation maintains adaptive alleles despite hybridization.