Results 151 to 160 of about 5,288 (181)

The generation of new S alleles at the incompatibility locus of Lycopersicum peruvianum Mill

Theoretical and Applied Genetics, 1971
A detailed analysis has been made of S genotypes in progenies derived from induced and spontaneous inbreeding processes in a clonal population of Lycopersicum peruvianum Mill. The results indicate that, in certain genetic backgrounds, induced inbreeding leads to the generation of a new S allele which usually first appears in the pistil of individuals ...
D, de Nettancourt, R, Ecochard, M D, Perquin, T, van der Drift, M, Westerhof   +4 more
openaire   +2 more sources

Pollen-expressed S-RNases are not involved in self-incompatibility in Lycopersicon peruvianum

Sexual Plant Reproduction, 1999
Self-incompatibility in solanaceous plants is gametophytically controlled by a multiallelic S-locus. The only known S-locus product is a series of extracellular ribonucleases (the S-RNases) which are expressed in the mature style and determine its self-incompatibility phenotype. Potentially, S-RNases also determine the self-incompatibility phenotype of
P. N. Dodds, C. Ferguson, A. E. Clarke, E. Newbigin   +3 more
openaire   +1 more source

Molecular diversity of three S-allele cDNAs associated with gametophytic self-incompatibility in Lycopersicon peruvianum

Plant Molecular Biology, 1994
We isolated S allele-associated cDNA clones from each of the stylar cDNA libraries of Lycopersicon peruvianum of two different S genotypes (S12Sb and S13Sc) with S11Sa allele-associated cDNA (LPS11) as a probe. The longest cDNA clones, designated LPS12 and LPS13, which were 779 bp and 853 bp in length, contained open reading frames of 189 and 210 amino
I K, Chung, T, Ito, H, Tanaka, A, Ohta, H G, Nan, M, Takagi   +5 more
openaire   +2 more sources

Self-compatibility in aLycopersicon peruvianum variant (LA2157) is associated with a lack of style S-RNase activity

Theoretical and Applied Genetics, 1994
A series of crosses between a naturally-occurring self-compatible accession ofLycopersicon peruvianum and a closely-related self-incompatible accession were used to demonstrate that the mutation to self-compatibility is located at the S-locus. Progeny of the crosses contain abundant style proteins of about 30 kDa that segregate with the S6and S7 ...
Y, Kowyama, C, Kunz, I, Lewis, E, Newbigin, A E, Clarke, M A, Anderson   +5 more
openaire   +2 more sources

Breakdown of self-incompatibility in tetraploid Lycopersicon peruvianum: inheritance and expression of S-related proteins

Theoretical and Applied Genetics, 1997
Lycopersicon peruvianum displays gametophytic self-incompatibility (GSI). We have isolated self-compatible (SC) tetraploids of L. peruvianum from tissue-cultured leaves and have explored the expression and inheritance of their S-related proteins. The Srelated protein profiles of styles of SC tetraploids were indistinguishable from the diploid self ...
B. Chawla, R. Bernatzky, W. Liang, M. Marcotrigiano   +3 more
openaire   +1 more source

Facts and hypotheses on the origin of S mutations and on the function of the S gene in Nicotiana alata and Lycopersicum peruvianum

Proceedings of the Royal Society of London. Series B. Biological Sciences, 1975
Fragments in certain pollen-part mutants are suspected to originate from duplications of satellited regions. Linkage tests demonstrate that, if this interpretation is correct, either the specificity segment of the S locus is not on the fragment or two unliked specificity segments operate respectively in pollen and style.
D, de Nettancourt, M, Devreux, F, Carluccio, U, Laneri, M, Cresti, E, Pacini, G, Sarfatti, A J, van Gastel   +7 more
openaire   +2 more sources

Obtaining advanced generations from Solanum peruvianum PI 126944 in the genetic background of S. lycopersicum by immature seed culture

Euphytica, 2017
The accession Solanum peruvianum PI 126944 has been reported as resistant to different biotic and abiotic stresses. In previous works of the group, advanced generations were derived from two interspecific hybrids, including up to pseudo-F6 generations and backcrosses to the cultivated species of some of the pseudo-Fn generations.
G. Campos, C. Gisbert, A. Pérez-de-Castro, M. J. Díez   +3 more
openaire   +1 more source

An S RNase Gene of Lycopersicon peruvianum L. is Highly Expressed in Transgenic Tobacco but Does not Affect Self-incompatibility

Journal of Plant Physiology, 1999
Summary Lycopersicon peruvianum has a gametophytic self-incompatibility (GSI) mechanism controlled by a single genetic locus (S locus) with multiple alleles. S RNases, an allelic series of abundant stylar proteins, are products of the S locus in L. peruvianum and other Solanaceous plants.
Chung, IK, Lee, SY, Lim, PO, Oh, SA, Kim, YS, Nam, HG   +5 more
openaire   +2 more sources

Fine mapping of the nematode resistance gene Mi-3 in Solanum peruvianum and construction of a S. lycopersicum DNA contig spanning the locus

Molecular Genetics and Genomics, 2005
Currently, the only genetic resistance against root-knot nematodes in the cultivated tomato Solanum lycopersicum (Lycopersicon esculentum) is due to the gene Mi-1. Another resistance gene, Mi-3, identified in the related wild species Solanum peruvianum (Lycopersicon peruvianum) confers resistance to nematodes that are virulent on tomato lines that ...
J, Yaghoobi, J L, Yates, V M, Williamson
openaire   +2 more sources

The 5' flanking sequences of two S alleles in Lycopersicon peruvianum are highly heterologous but contain short blocks of homologous sequences.

Plant & cell physiology, 1996
To characterize the molecular structure of the S alleles in Lycopersicon peruvianum, we isolated two genomic fragments that corresponded to cDNAs for S11 and S12 RNases from a genomic library of a plant with the S11S12 genotype. The coding regions and the flanking regions in both fragments were sequenced.
Chung, IK, Lee, SY, Ito, T, Tanaka, H, Nam, HG, Takagi, M   +5 more
openaire   +1 more source