HYBRID INCOMPATIBILITY IS ACQUIRED FASTER IN ANNUAL THAN IN PERENNIAL SPECIES OF SUNFLOWER AND TARWEED. (1st March 2014)

• Record Type: Journal Article
• Authors: Owens, Gregory L.; Rieseberg, Loren H.
• Is Part Of: Evolution. Volume 68:Number 3(2014:Mar.)
• Page Start: 893
• Page End: 900
• Publication Date: 2014-03-01
• Subjects: Evolutionary rate -- karyotypic changes -- life history -- plants -- speciation; Evolution -- Periodicals; Heredity -- Periodicals; Évolution (Biologie) -- Périodiques; Hérédité -- Périodiques; 338.47004094
• DOI: 10.1111/evo.12297
• Languages: English
• ISSNs: 0014-3820

Abstract

Abstract: Hybrid sterility is an important species barrier, especially in plants where hybrids can often form between divergent taxa. Here we explore how life history affects the acquisition of hybrid sterility in two groups in the sunflower family. We analyzed genetic distance and F1 pollen sterility for interspecific crosses in annual and perennial groups. We find that reproductive isolation is acquired in a steady manner and that annual species acquire hybrid sterility barriers faster than perennial species. Potential causes of the observed sterility pattern are discussed.