期刊
SCIENCE
卷 330, 期 6012, 页码 1827-1830出版社
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.1197908
关键词
-
资金
- NSF [DBI 0605200]
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.
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