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A parallel genetic algorithm for physical mapping of chromosomes

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3 Author(s)
Bhandarkar, S.M. ; Dept. of Comput. Sci., Georgia Univ., Athens, GA, USA ; Jinling Huang ; Arnold, J.

Physical map reconstruction in the presence of errors is a central problem in genetics of high computational complexity. A parallel genetic algorithm for a maximum likelihood estimation-based approach to physical map reconstruction is presented. The estimation procedure entails gradient descent search for determining the optimal spacings between probes for a given probe ordering. The optimal probe ordering is determined using a genetic algorithm. A two-tier parallelization strategy is proposed wherein the gradient descent search is parallelized at the lower level and the genetic algorithm is simultaneously parallelized at the higher level. Implementation and experimental results on a network of shared-memory symmetric multiprocessors (SMPs) are presented. The genetic algorithm is seen to result in physical maps with fewer contig breaks when compared to simulated Monte Carlo algorithms such as simulated annealing and the large-step Markov chain algorithm.

Published in:

Bioinformatics Conference, 2003. CSB 2003. Proceedings of the 2003 IEEE

Date of Conference:

11-14 Aug. 2003

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