QTL analysis of transgressive segregation in an interspecific tomato cross
Article Abstract:
Interspecific transgression was studied in wide crosses between Lycopersicon esculentum or cultivated tomato and Lycopersicon pennellii, a Peruvian species. Trait association with QTL markers was tested using a one-way ANOVA and interval mapping. Eight of the characters examined showed transgressive segregation in F2 populations and this occurrence was associated with the presence of QTL alleles. Progeny with traits opposite those of the parent were also detected. Epistasis was excluded as a contributing factor to transgressive segregations.
Publication Name: Genetics
Subject: Biological sciences
ISSN: 0016-6731
Year: 1993
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Meiotic behavior and linkage relationships in the secondarily homothallic fungus Agaricus bisporus
Article Abstract:
Cross 93B of the button mushroom, Agaricus bisporus, were analyzed for transmission of 64 segregating genetic markers. Two-point analysis of the electrophoretic karyotypes revealed the existenceof 11 linkage groups. Cross 93B undergoes conventional meiosis but crossing over frequency was low. The results obtained lend credence to an earlier sporogenesis cytogenetic model in Agaricus explaining the absence of recombination in heterokaryotic spore-offspring.
Publication Name: Genetics
Subject: Biological sciences
ISSN: 0016-6731
Year: 1993
User Contributions:
Comment about this article or add new information about this topic:
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