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- W2164696307 abstract "Abstract Divergent populations are intrinsically reproductively isolated when hybrids between them either fail to develop properly or do not produce viable offpring. Intrinsic isolation may result from Dobzhansky–Muller (DM) incompatibilities, in which deleterious interactions among genes or gene products lead to developmental problems or underdominant chromosome structure differences between the parents. These mechanisms can be tested by studying marker segregation patterns in a hybrid mapping population. Here we examine the genetic basis of abnormal development in hybrids between two geographically distant populations of the moss Ceratodon purpureus. Approximately half of the hybrid progeny exhibited a severely reduced growth rate in early gametophyte development. We identified four unlinked quantitative trait loci (QTL) that interacted asymmetrically to cause the abnormal development phenotype. This pattern is consistent with DM interactions. We also found an excess of recombination between three marker pairs in the abnormally developing progeny, relative to that estimated in the normal progeny. This suggests that structural differences in these regions contribute to hybrid breakdown. Two QTL coincided with inferred structural differences, consistent with recent theory suggesting that rearrangements may harbor population divergence alleles. These observations suggest that multiple complex genetic factors contribute to divergence among populations of C. purpureus." @default.
- W2164696307 created "2016-06-24" @default.
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- W2164696307 creator A5065891893 @default.
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- W2164696307 date "2008-07-01" @default.
- W2164696307 modified "2023-09-27" @default.
- W2164696307 title "The Genetic Basis of Developmental Abnormalities in Interpopulation Hybrids of the Moss <i>Ceratodon purpureus</i>" @default.
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- W2164696307 doi "https://doi.org/10.1534/genetics.107.086314" @default.
- W2164696307 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/2475744" @default.
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- W2164696307 hasPublicationYear "2008" @default.
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