Mapping a New Source of Self-fertility in Perennial Ryegrass ( Lolium perenne L.)

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Plant Breeding and Biotechnology, Vol: 1, Issue: 4, Page: 385-395

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Arias Aguirre, Andrea; Studer, Bruno; do Canto, Javier; Frei, Ursula; Lubberstedt, Thomas
Korean Society of Breeding Science
Self-fertility; Mapping; Perennial ryegrass; Self-incompatibility; Pollination tests; Segregation analysis
article description
There is a rising interest of moving towards hybrid breeding in outcrossing species. Self-compatibility (SC), which occurs at low rates in self-incompatible species, could be used to develop inbred lines, a key requirement for hybrid breeding programs. In perennial ryegrass, the existence of SC independent from the self-incompatibility (SI) loci S and Z has been reported. In this study, we used 98 F2 individuals from a cross between a self-compatible ecotype and an individual of the VrnA mapping population that were tested with markers for two candidate linkage groups 3 and 5 as well as markers for candidate regions at the S and Z locus. We were able to determine a tentative location of a SC locus and tested the possible interaction to other loci involved in SI and SC. This information will help to fine map the SC locus, and for marker-assisted selection.