Tomato Telotrisomics: Origin, Identification, and Use in Linkage Mapping

Reduced metaphase I associations between the short arms of homoeologous chromosomes in a Hordeum vulgare L. � H. bulbosum L. diploid hybrid influences the frequency of recombinant progeny

“…Benavente and Orellana (1984) and Naranjo and Orellana (1984) also noted that in triploid and tetraploid rye, respectively, chiasmate associations of the long arms of several identifiable chromosomes exceeded the frequencies for the short arms. And among tomato telotrisomics, trivalents were more frequent for long arms than short arms (Khush and Rick 1968). Of the chromosomes that we analysed, 1HS and 5HS have the shortest chromosome arms in the barley genome (Fukui and Kakeda 1990;Jensen and Linde-Laursen 1992;Marthe and Künzel 1994) and 5H b S the shortest arm in H. bulbosum (Symeonidis et al 1985).…”

Fine Mapping of ui6.1, a Gametophytic Factor Controlling Pollen-Side Unilateral Incompatibility in Interspecific Solanum Hybrids

“…There are many examples of gene-specific dosage effects in aneuploids and triploids. Genes that are dominant over wild type in normal (2x) heterozygotes may show reduced expression in trisomics containing two doses of the wild-type allele (Khush and Rick 1968). Some protein coding loci are expressed at levels proportional to their gene dosage, while other loci maintain expression at the diploid level via dosage compensation (Smith and Conklin 1975;Birchler 1979;Tanksley 1979).…”

The use of telotrisomics for centromere mapping in Arabidopsis thaliana (L.) Heynh.

“…This type of trisomic has alternatively been called telocentric trisomic, telotrisomic, monotelotrisomic and telosomic (Khush, 1973). In this paper telotrisomic as proposed by Khush and Rick (1968) is used. The localization of the centromere is mostly indirect.…”