z-logo
open-access-imgOpen Access
How does the S-locus determining self-incompatibility in stone fruits work in self-compatible peach?
Author(s) -
Attila Hegedűs,
Júlia Halász,
Zoltán Szabó,
J. Nyéki,
A. Pedryc
Publication year - 2005
Publication title -
acta agraria debreceniensis
Language(s) - English
Resource type - Journals
ISSN - 2416-1640
DOI - 10.34101/actaagrar/17/3277
Subject(s) - gynoecium , prunus , biology , allele , locus (genetics) , pollen tube , cultivar , pollen , gene , genetics , isoelectric focusing , botany , stamen , pollination , enzyme , biochemistry
The majority of stone fruit species are self-incompatible, a feature that is determined by a specific recognition mechanism between the S-ribonuclease enzymes residing in the pistils and the F-box proteins expressed in the pollen tubes. Failure in the function of any component of this bipartite system resulted in self-compatibility (SC) in many cultivars of Prunus species. Peach (Prunus persica (L.) Batsch.) is the only species in the Prunoideae subfamily that is traditionally known to be self-compatible, but its molecular background is completely unknown. Isoelectric focusing and S-gene specific PCR revealed that SC is not due to functional inability of pistil ribonucleases. We hypothesize that SC may be a consequence of a kind of pollen-part mutation or the action of one or more currently unknown modifier gene(s). Only two S-alleles were identified in a set of peach genotypes of various origin and phenotypes in contrast to the 17–30 alleles described in self-incompatible fruit trees. Most important commercial cultivars carry the same S-allele and are in a homozygote state. This indicates the common origin of these cultivars and also the consequence of self-fertilization. According to the available information, this is the first report to elucidate the role of S-locus in the fertilization process of peach. 

The content you want is available to Zendy users.

Already have an account? Click here to sign in.
Having issues? You can contact us here