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. 1994 Jan;136(1):119–127. doi: 10.1093/genetics/136.1.119

Meiotic Mutants That Cause a Polar Decrease in Recombination on the X Chromosome in Caenorhabditis Elegans

S A Broverman 1, P M Meneely 1
PMCID: PMC1205764  PMID: 8138150

Abstract

Recessive mutations in three autosomal genes, him-1, him-5 and him-8, cause high levels of X chromosome nondisjunction in hermaphrodites of Caenorhabditis elegans, with no comparable effect on autosomal disjunction. Each of the mutants has reduced levels of X chromosome recombination, correlating with the increase in nondisjunction. However, normal or elevated levels of recombination occur at the end of the X chromosome hypothesized to contain the pairing region (the left end), with recombination levels decreasing in regions approaching the right end. Thus, both the number and the distribution of X chromosome exchange events are altered in these mutants. As a result, the genetic map of the X chromosome in the him mutants exhibits a clustering of genes due to reduced recombination, a feature characteristic of the genetic map of the autosomes in non-mutant animals. We hypothesize that these him genes are needed for some processive event that initiates near the left end of the X chromosome.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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