Repetitive Homologous Sequences in Flanking Region of Gametophytic Self-Incompatibility Allele in Lycopersicon peruvianum

  • Chung, II-Kyung (Department of Horticultural Science, Catholic University of Taegu Hyosung)
  • Received : 1996.10.05
  • Published : 1997.01.31


Lycopersicon peruvianum shows a gametophytic self-incompatibility (GSI). GSI is controlled by a single locus (S locus) with multiple alleles. S ribonucleases encoded in S alleles cosegregate with their phenotypes of GSI in genetic cross. To understand the genetic role of S allele in L peruvianum, two large genomic fragments isolated previously were analyzed with total genomic DNAs from several tomato lines generated by cross-pollination. Southern blot analysis with the S allele fragments as probes revealed that the flanking region of S allele contained the highly homologous regions. It is speculated that they may play an important role to prevent genetic cross by self-pollination.


gametophytic self-incompatibility;Lycopersicon peruvianum;S allele


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