Journal ArticleDOI
Identi®cation of seven S-alleles from the European pear (Pyrus communis) and the determination of compatibility among cultivars
TLDR
To identify potential fully compatible pollinators for `Spadona', additional cultivars that are being considered for introduction into the Israel pear orchard were analysed and it was discovered that `Bon Rouge', `Doctor Jill Guyot', `Forelle' and `Red Clapp' are semi-compatible and that `Lawson' is fully compatible with ` Spadona'.Abstract:
SummaryThe European pear (Pyrus communis) belongs to the Rosaceae, which carries the gametophytic self-incompatibility fertilization system (GSI). GSI is haplotype speci®c and controlled by the S-locus. The S-locus carries a multi-allelic gene that encodes for RNase (S-RNase), which is involved in executing pollen rejection in a speci®c manner. The different S-alleles also serve for molecular identi®cation of the S-haplotypes. Orchards of trees carrying GSI contain at least two cultivars, which are fertilization-compatible with each other. However, compatibility may be full when the cultivars differ in both their S-loci or partial when they share one of the two S-loci. Semi-compatibility between cultivars can lead to yield reduction, since half of the pollinator's pollen is rejected. Identi®cation of semi-compatibility according to yield levels is not always trivial, since many factors are involved in yield production. On the contrary, the application of molecular analysis, for the identi®cation of S-RNas...read more
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Journal ArticleDOI
Molecular Basis of Self-(in)compatibility and Current Status of S-genotyping in Rosaceous Fruit Trees
Hisayo Yamane,Ryutaro Tao +1 more
TL;DR: The current knowledge of the molecular basis of self-(in)compatibility, S-genotyping methods, and molecular markers for SC in rosaceous fruit tree species is summarized.
Journal ArticleDOI
Molecular bases and evolutionary dynamics of self-incompatibility in the Pyrinae (Rosaceae).
TL;DR: Experimental data suggest that the mechanism controlling pollen-pistil recognition specificity of the Pyrinae might fit well with the collaborative 'non-self' recognition system proposed for Petunia (Solanaceae), whereas it presents relevant differences with the mechanism exhibited by the species of the closely related genus Prunus.
Journal ArticleDOI
The RHV region of S-RNase in the European pear ( Pyrus communis ) is not required for the determination of specific pollen rejection
TL;DR: It is shown that Sn-RNase does not prevent fertilization by Si-pollen haplotype, thus presenting a case in which RHV is not required for the determination of specific pollen rejection by S- RNase, and implying that other regions in the enzyme may be sufficient for this specificity.
Journal ArticleDOI
Synergistic effects between bumblebees and honey bees in apple orchards increase cross pollination, seed number and fruit size
G. Sapir,Z. Baras,G. Azmon,Martin Goldway,Sharoni Shafir,A. Allouche,E. Stern,Raphael A. Stern +7 more
TL;DR: It appears that the addition of BBs to apple orchards did not only increase the number of pollinating insects in the orchard that could perform cross-pollination, but that it also changed HB foraging behavior, which resulted in improved cross- pollination and increased efficiency, and subsequently more seeds and larger fruit.
Journal ArticleDOI
Renumbering the S-RNase alleles of European pears (Pyrus communis L.) and cloning the S109 RNase allele
Martin Goldway,Takashi Takasaki-Yasuda,Javier Sanzol,Mariana Mota,Annat Zisovich,Raphael A. Stern,Silviero Sansavini +6 more
TL;DR: In an attempt to end confusion, a joint decision of the research groups that had cloned the European pear S-RNase alleles and had S-genotyped many of the cultivars, undertook to renumber the EuropeanPear S-RNA alleles.