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- W2002133908 abstract "A model is presented as an explanation for an anomaly observed in germination and establishment and isozyme segregation patterns in <i>Allium cepa × A. fistulosum</i> F<sub>2</sub>BC<sub>3</sub> populations generated in an introgression-breeding program. The F<sub>1</sub>BC<sub>3</sub> parent of these populations was selected for its heterozygous PGI phenotype, <i>Pgi-1<sup>2/3</sup></i>; <i>Pgi-1<sup>2</sup></i> was inherited from an <i>A. cepa</i> (Ac) seed parent and <i>Pgi-1<sup>3</sup></i> from an <i>A. fistulosum</i> (Af) pollen parent. Germination and establishment was recorded for the F<sub>2</sub>BC<sub>3</sub> progeny population. Segregation of Ac and Af <i>Pgi-1</i> alleles was investigated in F<sub>2</sub>BC<sub>3</sub> seeds and embryo and endosperm tissue was isolated and tested for isozyme expression. A pooled goodness-of-fit test of the segregation of <i>Pgi-1</i> alleles in the populations to the expected Mendelian 1:2:1 ratio using the chi-square statistic gave a χ<sup>2</sup> = 185.9, well beyond the accepted limits at 2 degrees of freedom. The 1:2:1 ratio expected for simple Mendelian inheritance was rejected, while a pooled chi-square goodness-of-fit test of the segregation of <i>Pgi-1</i> alleles in the populations fit a 1:1 ratio with a χ<sup>2</sup> = 0.203, based on the incongruity model. We present here the central cell nuclear-cytoplasmic incongruity hypothesis to explain the observed anomalies." @default.
- W2002133908 created "2016-06-24" @default.
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- W2002133908 date "2005-01-01" @default.
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- W2002133908 title "Central cell nuclear-cytoplasmic incongruity:a mechanism for segregation distortion in advanced backcross and selfed generations of (<i>Allium cepa </i>L. × <i>Allium fistulosum</i> L.) × <i>A. cepa</i> interspecific hybrid derivatives" @default.
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- W2002133908 doi "https://doi.org/10.1159/000082426" @default.
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