title: Self-compatibility in aLycopersicon peruvianum variant (LA2157) is associated with a lack of style S-RNase activity.
abstract: A series of crosses between a naturally-occurring self-compatible accession ofLycopersicon peruvianum and a closely-related self-incompatible accession were used to demonstrate that the mutation to self-compatibility is located at the S-locus. Progeny of the crosses contain abundant style proteins of about 30 kDa that segregate with the S6and S7-alleles from the SI parent and the Sc-allele from the SC parent. The S6and S7-associated proteins have ribonuclease activity whereas the Sc-associated protein is not an active ribonuclease. This finding indicates that S-RNases are determinants of self-incompatibility in the style and that the ribonuclease activity is essential for their function.
authors.affiliation: Plant Cell Biology Research Centre, School of Botany, University of Melbourne, 3052, Parkville, Victoria, Australia.
authors.forename: Y
authors.initials: Y
authors.lastname: Kowyama
authors.forename: C
authors.initials: C
authors.lastname: Kunz
authors.forename: I
authors.initials: I
authors.lastname: Lewis
authors.forename: E
authors.initials: E
authors.lastname: Newbigin
authors.forename: A E
authors.initials: AE
authors.lastname: Clarke
authors.forename: M A
authors.initials: MA
authors.lastname: Anderson