Evolution of the Rice Xa2I Disease Resistance Gene Family
BibTeX
@MISC{_evolutionof,
author = {},
title = {Evolution of the Rice Xa2I Disease Resistance Gene Family},
year = {}
}
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Abstract
The rice disease resistance gene Xa21, encoding a receptor-like kinase, is a member of a multigene family. Sequence analysis of seven family members revealed two distinkt classes of genes. One member from each class encodes a receptor kinase-like open reading frame. The other five members encode truncated open reading frames of the pre-dicted receptor kinase. A highly conserved 233-bp sequence (HC) was also identified among the seven family members. Recombination at the HC region between family members apparently resulted in the precise swapping of promoter regions. Large sequence duplications were generated by a presumed unequal crossover event in intergenic regions. lnsertions of transposon-like sequences truncated two of the predicted open reading frames. A model for amplification and diversification of the Xa21 gene family is presented.
Keyphrases
family member hc region precise swapping predicted open reading frame promoter region pre-dicted receptor kinase receptor kinase-like open reading frame large sequence duplication presumed unequal crossover event multigene family sequence analysis xa21 gene family rice disease resistance gene xa21 receptor-like kinase transposon-like sequence 233-bp sequence intergenic region distinkt class
