Molecular genetics of the R complex of maize. Final technical report DE-FG02-86ER13627

Dellaporta, Stephen

Dept MCD Biology, Yale University, New Haven, CT (United States)

关键词: Gene Recombination;    Gene Regulation;    Maize;    Genetics;    Progress Report Maize;   

DOI  :  10.2172/809192
RP-ID  :  NONE
RP-ID  :  FG02-86ER13627
RP-ID  :  809192

美国|英语

来源: UNT Digital Library

【 摘 要 】

A molecular genetic characterization of the maize R-r complex of maize was completed during the period of support. The complex was shown to consist of two main regions: the P region, containing the r-p gene which controlled pigmentation of plant parts, and the S subcomplex, containing two rl-s genes in head-to-head orientation and a nonfunctional component termed rl-q. By examining the DNA sequences at the junction of the rl genes, the complex was shown to be derived by a series of abortive transposition events. The transposable element involved in the gene duplication and rearrangements was characterized and called doppia. Meiotic instability of the R-r complex was also characterized. Loss of P or S function was associated with several structural changes including intrachromosomal recombination and excision of a novel transposable element that appears to show instability only during meiosis.