Interspecific chromosome exchanges in polyploid Musa

Interspecific chromosome exchanges in polyploid <i>Musa</i>

Interspecific chro­mo­some exchanges in poly­ploid Musa

Edible bana­nas ori­gin­ated mainly from two wild spe­cies, Musa acuminata and M. bal­bisi­ana, and recom­bin­a­tions between chro­mo­somes occur in poly­ploid vari­et­ies. Jeridi et al. com­pare homoeolog­ous pair­ing in a dip­loid inter­spe­cific vari­ety and in its allotet­raploid deriv­at­ive obtained from induced chromosome-doubling. Analysis of chro­mo­some asso­ci­ations at both ploidy levels sug­gests that the newly formed allotet­raploid behaves as a ‘seg­mental allotet­raploid’ with three chro­mo­some sets in a tet­ra­somic pat­tern, three sets in a likely disomic pat­tern and the five remain­ing sets in an inter­me­di­ate pat­tern. The seg­mental inher­it­ance pat­tern exhib­ited by the allotet­raploid gen­o­type implies chro­mo­some exchanges between M. acuminata and M. bal­bisi­ana spe­cies and opens new hori­zons for recip­rocal trans­fer of valu­able alleles.

Annals of Botany Office.

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

Pin It on Pinterest

Liked this?

Be the first to share this post with your friends!