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Recent developments: FMM<br />

• Existing practical methods are approximate (2-step).<br />

W. Astle and D. Balding have developed fast mixed<br />

models algorithm, which is under implementation in<br />

GenABEL<br />

• Computation time: for all methods, linear with<br />

#markers, with n = #people:<br />

– GRAMMAS-GC ~ O(n)<br />

– MMSCORE ~ O(n 2 )<br />

– new FMM ~ O(n 2 +kn), where k is small (3-10)<br />

QTL/MAS Workshop, May 2010, Poznan<br />

Yurii Aulchenko

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