SELF-INCOMPATIBILITY IS CODOMINANT IN INTRASPECIFIC HYBRIDS OF SELF-COMPATIBLE AND SELF-INCOMPATIBLE LYCOPERSICON-PERUVIANUM AND L-HIRSUTUMBASED ON PROTEIN AND DNA MARKER ANALYSIS
R. Bernatzky et Dd. Miller, SELF-INCOMPATIBILITY IS CODOMINANT IN INTRASPECIFIC HYBRIDS OF SELF-COMPATIBLE AND SELF-INCOMPATIBLE LYCOPERSICON-PERUVIANUM AND L-HIRSUTUMBASED ON PROTEIN AND DNA MARKER ANALYSIS, Sexual plant reproduction, 7(5), 1994, pp. 297-302
Self-compatibility was investigated separately in two species of tomat
o, Lycopersicon peruvianum and L. hirsutum. The codominant expression
of self-compatibility (SC)/self incompatibility (SI) was established u
sing intraspecific hybrids of SC and SI hybrids. In SC L. peruvianum,
a major stylar protein of approximately 29 kDa cosegregates with self-
compatibility in the progeny of SC/SI hybrids. The SC/SI hybrids are s
elf-fertile, but only partially so, since the SI allele present in the
hybrids is capable of eliminating certain genotypes in the resultant
progeny. In L. hirsutum, the majority of hybrids between one accession
of SI L. hirsutum f. hirsutum and one of SC L. hirsutum f. glabratum
are self-fertile. Analysis of the progeny revealed that the SC and SI
alleles are codominant in this species as well. A protein product for
the SC allele is not obvious in style extracts of L. hirsutum f. glabr
atum. Segregating progeny from SC/SI hybrids of L. hirsutum were used
to map the S locus against five RFLP markers on chromosome 1, and esti
mated map distances are given. In addition, evidence is presented that
indicates that one of the DNA markers, CD15, is duplicated in L. hirs
utum f. glabratum, and the duplication is not linked to the S locus.