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Updated: Aug 9, 2026

Determination of Self- and Inter-(in)compatibility Relationships in Apricot Combining Hand-Pollination, Microscopy and Genetic Analyses
Published on: June 16, 2020
Gametophytic self-incompatibility is controlled by a single major locus on chromosome 1 in Lycopersicon peruvianum
S D Tanksley1, F Loaiza-Figueroa
1Department of Horticulture and Plant Genetic Engineering Laboratory, New Mexico State University, Las Cruces, NM 88003.
Abstract:
By using a number of previously mapped enzyme-coding genes as genetic markers, it has been possible to scan the genome of Lycopersicon peruvianum for gene(s) controlling the gametophytic self-incompatibility reaction. Regardless of genetic background or level of inbreeding, only a single locus (S), mapping to chromosome 1, was found to control the self-incompatibility reaction. Despite the widespread occurrence of this form of self-incompatibility in higher plants, to the best of our knowledge, the locus underlying the response has not been confirmed previously through genetic mapping, and the results cast doubts on hypotheses requiring multifactoral or dynamic control of gametophytic self-incompatibility.
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