Clear evidence is provided by GISH about allopolyploid
evolutionary origin of Camellia reticulata.
considered as strict allopolyploids
based on their regular bivalent
Recurring origins of allopolyploid
species in Asplenium.
Based on the coassembly of homoeologs, SNiPloid compares either putative SNPs detected from an allopolyploid
to those obtained in its parental genomes, or putative SNPs derived from two allopolyploid
accessions to search for polymorphism.
Grant-Downton and Dickinson (2006) indicated that research of the epigenetics of allopolyploid
hybrids between Arabidopsis thaliana and A.
While our study is not the first to distinguish the timing of allopolyploidization relative to dispersal, it contributes to a growing body of evidence documenting the post dispersal formation of allopolyploids
in diverse lineages, including well studied examples such as Tragapogon (e.g., Ownbey, 1950; Lim et al., 2008; dispersal in the past century) and Lepidium (Mummenhoff et al., 2004; Dierschke et al., 2009; dispersal also during the Pliestocene).
adiantum-nigrum is of allopolyploid
origin, arising from the hybridization of two strictly European diploids, A.
However, when Kimber discusses the relationships of allopolyploids
in general (1986: 65), his comments are ad hoc and not based on observations: "It can be demonstrated that chromosome pairing in hybrids represents the comparison of some DNA distributed along the entire length of the nuclear DNA, and thus it should represent the most reliable method of determining genomic homology in allopolyploids
." Presently, objective similarity between chromosomes exists only at the macroscopic level.
Asexual dandelions reproduce by nonpseudogamous gametophytic parthenogenesis (Gustafsson, 1946) and are presumably allopolyploids
were considered to be allopolyploids
having some ancestral genomes in common.
These species or their ancestors probably originated as allopolyploids
, rather than as autopolyploids (Heaslip, 1951).
Genomic in situ hybridization (GISH) technique has been used to distinguish different genomes in allopolyploids
and alien addition lines (Anamthawat-Jonssen et al., 1990; Mukai et al., 1993; Chen et al., 1995).