A general polyploid model for analyzing gene segregation in outcrossing tetraploid species.

Genetics
R L WuZ B Zeng

Abstract

Polyploidy has played an important role in higher plant evolution and applied plant breeding. Polyploids are commonly categorized as allopolyploids resulting from the increase of chromosome number through hybridization and subsequent chromosome doubling or autopolyploids due to chromosome doubling of the same genome. Allopolyploids undergo bivalent pairing at meiosis because only homologous chromosomes pair. For autopolyploids, however, all homologous chromosomes can pair at the same time so that multivalents and, therefore, double reductions are formed. In this article, we use a maximum-likelihood method to develop a general polyploid model for estimating gene segregation patterns from molecular markers in a full-sib family derived from an arbitrary polyploid combining meiotic behaviors of both bivalent and multivalent pairings. Two meiotic parameters, one describing the preference of homologous chromosome pairing (expressed as the preferential pairing factor) typical of allopolyploids and the other specifying the degree of double reduction of autopolyploids, are estimated. The type of molecular markers used can be fully informative vs. partially informative or dominant vs. codominant. Simulation studies show that our polyploi...Continue Reading

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Citations

Apr 21, 2005·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·A M MissaouiJ H Bouton
Dec 8, 2004·Journal of Computational Biology : a Journal of Computational Molecular Cell Biology·Rongling WuGeorge Casella
Feb 24, 2015·Genetics·Soraya Leal-BertioliDavid Bertioli
Dec 21, 2020·Trends in Genetics : TIG·Lidan SunRongling Wu
Aug 9, 2002·Theoretical Population Biology·Rongling WuGeorge Casella
Jul 25, 2021·Plant Reproduction·Joseph H Williams
Feb 26, 2010·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·Peter BakerKaren Aitken
Apr 1, 2010·Genetics and Molecular Biology·Shaochen XingKaida Zhou
Feb 15, 2011·International Journal of Plant Genomics·Jiahan LiRongling Wu

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