Maximum likelihood inference of chromosome numbers

Maximum likelihood inference of chromosome numbers

Maximum like­li­hood infer­ence of chro­mo­some numbers

Botanists inter­ested in changes in chro­mo­some num­ber have often relied on infer­ring a basic num­ber, x, but this has been done without con­sist­ent (repro­du­cible) ref­er­ence to spe­cies’ rela­tion­ships and fre­quen­cies of par­tic­u­lar num­bers in a group. Cusimano et al.  recon­struct ances­tral num­bers in the large mono­cot fam­ily Araceae using like­li­hood mod­els that treat poly­ploidy, chro­mo­some fusion and chro­mo­some fis­sion as events with par­tic­u­lar prob­ab­il­it­ies. The res­ults show that chro­mo­some fusion is com­mon, whereas poly­ploid­iz­a­tion is mostly restric­ted to recent Araceae groups, and sug­gest that the algeb­raic approach to the cal­cu­la­tion of x may not be reli­able, at least when applied to large clades.

Annals of Botany Office.

The Annals of Botany Office is based at the University of Leicester.

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