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Inheritance of five new tomato seedling characters



Inheritance of five new tomato seedling characters



Jour Heredity 50(3): 90-98



Phenotypes are described for 5 new mutants of the cultivated tomato. Each one can be clearly distinguished from normal in the seedling stage and is conditioned by a single gene. A complete anthocyanin deficiency results from the action of ah; leaf shape is modified in various ways by the other mutations. One (Me) is incompletely dominant, permitting identification of all 3 genotypes; another, (ff) can be similarly classified under field conditions but in general is most effectively treated as a recessive; the rest, (sf, ah, and ht) are recessive. Except for a consistent deficiency of ht and ff homozygotes, and a few deviating families for other genes, the segregants conformed to expected ratios. A significant indication of linkage was obtained for 4 of the genes and also for the previously unlocated genes, Cu, rv, and tf. The genes, Cu, ff, and Me exhibit linkage with markers of chromosome 2, for which a four-point test cross reveals the following spatial relations: d1 - 12.5 - aw - 16 - Me - 3 - Wom. Chromosome 7 is marked by tf, a three-point test providing the following estimated distances: -wt - 15 - tf - 30.5 - mc. A linkage between ah and wd provides chromosome 9 with its first known seedling marker. The gene sf is linked with rv (33-35 units) on an unidentified chromosome.

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Accession: 014082185

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DOI: 10.1093/oxfordjournals.jhered.a106895


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