Publication Date:
2011-01-06
Description:
Self-incompatibility (SI)--intraspecific pollen recognition systems that allow plants to avoid inbreeding--in the Solanaceae (the nightshade family) is controlled by a polymorphic S locus where "self" pollen is rejected on pistils with matching S alleles. In contrast, unilateral interspecific incompatibility (UI) prevents hybridization between related species, most commonly when the pollen donor is self-compatible (SC) and the recipient is SI. We observed that in Solanum, a pollen-expressed Cullin1 gene with high similarity to Petunia SI factors interacts genetically with a gene at or near the S locus to control UI. Cultivated tomato and related red- or orange-fruited species (all SC) exhibit the same loss-of-function mutation in this gene, whereas the green-fruited species (mostly SI) contain a functional allele; hence, similar biochemical mechanisms underlie the rejection of both "self" and interspecific pollen.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Li, Wentao -- Chetelat, Roger T -- New York, N.Y. -- Science. 2010 Dec 24;330(6012):1827-30. doi: 10.1126/science.1197908.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Plant Sciences, University of California, Davis, CA 95616, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21205670" target="_blank"〉PubMed〈/a〉
Keywords:
Alleles
;
Amino Acid Sequence
;
Base Sequence
;
Crosses, Genetic
;
Cullin Proteins/*genetics/metabolism
;
Flowers/physiology
;
*Genes, Plant
;
Hybridization, Genetic
;
Introns
;
Lycopersicon esculentum/*genetics/*physiology
;
Molecular Sequence Data
;
Plant Proteins/*genetics/metabolism
;
Plants, Genetically Modified
;
Pollen/*genetics/physiology
;
Pollination
;
RNA, Messenger/genetics/metabolism
;
RNA, Plant/genetics/metabolism
;
Ribonucleases/genetics/metabolism
;
Sequence Deletion
;
Solanum/*genetics/physiology
Print ISSN:
0036-8075
Electronic ISSN:
1095-9203
Topics:
Biology
,
Chemistry and Pharmacology
,
Computer Science
,
Medicine
,
Natural Sciences in General
,
Physics
