Floral isolation is the major reproductive barrier between a pair of rewarding orchid sister species

2015 ◽  
Vol 28 (1) ◽  
pp. 117-129 ◽  
Author(s):  
M. Sun ◽  
P. M. Schlüter ◽  
K. Gross ◽  
F. P. Schiestl
Keyword(s):  
Reproductive Barrier ◽  
Sister Species ◽  
Floral Isolation

scholarly journals FLORAL ISOLATION IS THE MAIN REPRODUCTIVE BARRIER AMONG CLOSELY RELATED SEXUALLY DECEPTIVE ORCHIDS

Evolution ◽  
2011 ◽  
Vol 65 (9) ◽  
pp. 2606-2620 ◽  
Author(s):  
Shuqing Xu ◽  
Philipp M. Schlüter ◽  
Giovanni Scopece ◽  
Hendrik Breitkopf ◽  
Karin Gross ◽  
...  
Keyword(s):  
Reproductive Barrier ◽  
Floral Isolation ◽  
Sexually Deceptive Orchids

Enzyme activities in two sister-species of carnivorous pitcher plants (Nepenthes) with contrasting nutrient sequestration strategies

2021 ◽  
Vol 161 ◽  
pp. 113-121
Author(s):  
Ondřej Kocáb ◽  
Michaela Bačovčinová ◽  
Boris Bokor ◽  
Marek Šebela ◽  
René Lenobel ◽  
...  
Keyword(s):  
Enzyme Activities ◽  
Sister Species ◽  
Pitcher Plants ◽  
Nutrient Sequestration

Introgression between non-sister species of honeyeaters (Aves: Meliphagidae) several million years after speciation

2019 ◽  
Vol 128 (3) ◽  
pp. 583-591
Author(s):  
Leo Joseph ◽  
Alex Drew ◽  
Ian J Mason ◽  
Jeffrey L Peters
Keyword(s):  
Gene Flow ◽  
Reproductive Isolation ◽  
Sex Chromosomes ◽  
Common Ancestor ◽  
Sister Species ◽  
Species Boundaries ◽  
North Eastern ◽  
The City

Abstract We reassessed whether two parapatric non-sister Australian honeyeater species (Aves: Meliphagidae), varied and mangrove honeyeaters (Gavicalis versicolor and G. fasciogularis, respectively), that diverged from a common ancestor c. 2.5 Mya intergrade in the Townsville area of north-eastern Queensland. Consistent with a previous specimen-based study, by using genomics methods we show one-way gene flow for autosomal but not Z-linked markers from varied into mangrove honeyeaters. Introgression barely extends south of the area of parapatry in and around the city of Townsville. While demonstrating the long-term porosity of species boundaries over several million years, our data also suggest a clear role of sex chromosomes in maintaining reproductive isolation.

scholarly journals Phylogeny and biogeography of midwife toads (Alytes, Discoglossidae): a reappraisal

1997 ◽  
Vol 66 (4) ◽  
pp. 257-262
Author(s):  
Cristian R. Altaba
Keyword(s):  
Data Base ◽  
Saline Lakes ◽  
Genetic Distances ◽  
Sister Species ◽  
Phylogenetic Hypothesis ◽  
Allozyme Data ◽  
Taxonomic Treatment ◽  
Discrete Character ◽  
Break Up ◽  
The One

The allozyme data base of Arntzen & García-París (1995) on midwife toads (Alytes, Discoglossidae) is reanalysed considering each locus as a discrete character. The phylogeny thus inferred differs from the one obtained with genetic distances in the position of A. dickhilleni from the Betic region – it appears that its sister species is the widespread A. obstetricans, not the Mallorcan endemic A. muletensis. This phylogenetic hypothesis agrees with the taxonomic treatment of the genus based on morphology. A testable biogeographic hypothesis is proposed to account for the diversification of midwife toads in Iberia and the Balearics. The postulated underlying geological changes were the spread of inland saline lakes that divided Iberia (16 mY B.P.), the emergence and break-up of the Betic orogen (14 mY), and the formation of the Betic Strait (8 mY). Dispersal over sea channels or during the Messinian Crisis (6 mY) are deemed unlikely on the basis of ecological and biogeographical data.

Systematic studies in Paniceae (Poaceae): Homopholis and Whalleya gen. et sp. nov.

2000 ◽  
Vol 13 (3) ◽  
pp. 437 ◽  
Author(s):  
Karen E. Wills ◽  
R. D. B. Whalley ◽  
Jeremy J. Bruhl
Keyword(s):  
Sister Group ◽  
The Other ◽  
Sister Species ◽  
Parsimonious Tree ◽  
The Third ◽  
Putative Species ◽  
Anatomical Data ◽  
Cladistic Analyses

The taxonomy ofHomopholis C.E.Hubb. is revised, and anew genus Whalleya K.E.Wills & J.J.Bruhl isdescribed. Relationships among the known species ofHomopholis (H. belsonii C.E.Hubb.,H. proluta F.Muell., and a putative species,H. sp. nov.), and the relationships betweenHomopholis and other genera within the Paniceae were investigated. Morphological and anatomical data forHomopholis and selected species ofDigitaria and Panicum were analysed phenetically and cladistically. The value and contribution ofcharacters to the findings were assessed. In the phenetic analyses, threedistinct clusters of species were formed. The first cluster includedDigitaria coenicola (F.Muell.) Hughes,D. divaricatissima (R.Br.) Hughes andD. papposa (R.Br.) P.Beauv.; the second,Panicum effusum R.Br.,P. queenslandicum Domin var.queenslandicum and P. simileDomin; and the third, H. sp. nov.,H. proluta, H. belsonii andP. subxerophilum Domin. Specimens ofH. belsonii noticeably separated from the other threespecies. For the cladistic analyses, species ofEntolasia and Thyridolepis were used as outgroup taxa. One most parsimonious tree was produced.Homopholis belsonii was well supported as the most basalmember of the ingroup. The three species ofDigitariaformed a well-supported clade.Panicum effusum, P. queenslandicumvar. queenslandicum and P. simileformed a well-supported clade, and were the sister group toEntolasia marginata (R.Br.) Hughes andE. stricta (R.Br.) Hughes.Panicum subxerophilum was in a clade (=Whalleya) with H. sp. nov. andH. proluta, with P. subxerophilumand H. proluta as sister species.

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