Whole genome comparisons of Fragaria, Prunus and Malus reveal different modes of evolution between Rosaceous subfamilies Page: 8
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Jung et al. BMC Genomics 2012, 13:129
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- t- Fragaria
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Figure 4 Hypothetical evolutionary steps from the nine Rosaceae ancestral chromosomes to Fragaria, Prunus and Malus lineage. Each
color represent distinct CARs detected by MGRA algorithm. Chromosomal rearrangements specific for Rosoideae (contains Fragaria) and
Spireaoideae (contains Ma/us and Prunus) are depicted. Also shown are chromosomal rearragenments specific for Prunus, Ma/us, and subgenome
of Ma/us after the WGD.
fission events and four fusion events and the Malus line-
age went through seven fission events and nine fusion
events. Two fission events occurred after the split of Fra-
garia and before the split of Malus and Prunus. Two
further fission events and three fusion events occurred
before the WGD of Malus lineage and the three further
fission events occurred after the WGD in only one of the
two homeologous chromosomes (Figure 4) of Malus.
These data suggest that the Prunus lineage has the most
conserved karyotype of the three species investigated and
that the Malus lineage went through the most large-scale
chromosomal fission/fusion events. It is also clear that
intrachromosomal genome rearrangements played an
important role in the genome evolution of the genus Fra-
garia. Additionally, Figure 4 suggests that the karyotypes
of the ancestor of Malus existed before the WGD, as Ml,
M9 and A2 to A8. Ml and M9 were generated from Al
and A9, after four fissions and three fusions, and corre-
spond to the present Malus chromosomes MC5/MC10
and MC3/MC11, respectively. Our result is consistent
with previous phylogenetic analyses [21,35] and the ana-
lysis of comparative mapping data , in suggesting that
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Jung, Sook; Cestaro, Alessandro; Troggio, Michela; Main, Dorrie; Zheng, Ping; Cho, Ilhyung et al. Whole genome comparisons of Fragaria, Prunus and Malus reveal different modes of evolution between Rosaceous subfamilies, article, April 4, 2012; [London, United Kingdom]. (digital.library.unt.edu/ark:/67531/metadc122145/m1/8/: accessed May 27, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT College of Arts and Sciences.