scholarly journals A re‐evaluation of the homoploid hybrid origin of A egilops tauschii , the donor of the wheat D‐subgenome

2015 ◽  
Vol 208 (1) ◽  
pp. 4-8 ◽  
Author(s):  
Lin‐Feng Li ◽  
Bao Liu ◽  
Kenneth M. Olsen ◽  
Jonathan F. Wendel
Keyword(s):  
Hybrid Origin ◽  
Homoploid Hybrid

scholarly journals Needle morphological evidence of the homoploid hybrid origin of P inus densata based on analysis of artificial hybrids and the putative parents, P inus tabuliformis and P inus yunnanensis

2014 ◽  
Vol 4 (10) ◽  
pp. 1890-1902 ◽  
Author(s):  
Fangqian Xing ◽  
Jian‐Feng Mao ◽  
Jingxiang Meng ◽  
Jianfeng Dai ◽  
Wei Zhao ◽  
...  
Keyword(s):  
Hybrid Origin ◽  
Morphological Evidence ◽  
Homoploid Hybrid

Evolutionary history of Purple cone spruce (Picea purpurea) in the Qinghai-Tibet Plateau: homoploid hybrid origin and Pleistocene expansion

2013 ◽  
Vol 23 (2) ◽  
pp. 343-359 ◽  
Author(s):  
Yongshuai Sun ◽  
Richard J. Abbott ◽  
Lili Li ◽  
Long Li ◽  
Jiabin Zou ◽  
...  
Keyword(s):  
Evolutionary History ◽  
Hybrid Origin ◽  
Tibet Plateau ◽  
History Of ◽  
Homoploid Hybrid ◽  
Qinghai Tibet Plateau

scholarly journals Morphological and Genome-Wide Evidence of Homoploid Hybridisation in Urospermum (Asteraceae)

Plants ◽  
2022 ◽  
Vol 11 (2) ◽  
pp. 182
Author(s):  
Jaume Pellicer ◽  
Manica Balant ◽  
Pol Fernández ◽  
Roi Rodríguez González ◽  
Oriane Hidalgo
Keyword(s):  
Mediterranean Region ◽  
Sequence Data ◽  
Molecular Methods ◽  
Hybrid Origin ◽  
Genome Wide ◽  
Intermediate Morphology ◽  
Mediterranean Regions ◽  
Homoploid Hybrid ◽  
Potential Impact ◽  
Intermediate Traits

The genus Urospermum is distributed in the Mediterranean region and Macaronesia, and has been introduced to other extra-Mediterranean regions. Although the two species constituting the genus, U. dalechampii and U. picroides, are frequently found together, hybrids have so far only been reported once, from Morocco. However, we found certain individuals in Catalonia, whose intermediate morphology suggested a potential hybrid origin. In this study, we applied morphological and molecular methods to investigate the origin of those individuals. Intermediate features at phenotype, karyological, cytogenetic, and genomic levels were identified in morphologically intermediate individuals, supporting their homoploid hybrid origin. Chloroplast sequence data suggest that U. dalechampii is the maternal progenitor of the hybrid. Together with the intermediate traits displayed, the lack of fertile seeds suggests that hybrids are probably F1. Future monitoring studies will be, nonetheless, needed to evaluate the extent of hybridisation and its potential impact on the biology of the genus.

scholarly journals Evolutionary origin and systematic position of Euphorbia normannii (Euphorbiaceae), an intersectional hybrid and local endemic of the Stavropol Heights (Northern Caucasus, Russia)

2021 ◽  
Vol 307 (2) ◽  
Author(s):  
Božo Frajman ◽  
Dmitry Geltman
Keyword(s):  
Phylogenetic Signal ◽  
Nuclear Data ◽  
Systematic Position ◽  
Hybrid Origin ◽  
Northern Caucasus ◽  
Phylogenetic Position ◽  
Annual Species ◽  
The Caucasus ◽  
Homoploid Hybrid ◽  
Local Endemic

AbstractThe Caucasus is one of the richest areas in the world in terms of animal and plant diversity, harbouring 6400 plant species. As a part of the Northern Caucasus, the Stavropol Heights are renowned for their local endemism, highlighted by six species of flowering plants endemic to this area. One of them is the annual species Euphorbia normannii, described in 1891, but with uncertain taxonomic position. We here used nuclear ribosomal internal transcribed spacer and plastid trnT–trnF sequences to infer the phylogenetic position of E. normannii. The nuclear data inferred its position within E. sect. Myrsiniteae, whereas the plastid data placed it within E. sect. Pithyusa, thus indicating a hybrid origin. Relative genome size (RGS) data indicate that E. normannii has the highest RGS compared to three other annual species belonging to both sections (E. aleppica, E. gaillardotii and E. falcata). Our data are inconclusive whether E. normannii is of allopolyploid or homoploid hybrid origin, or whether later hybridisation and plastid capture from E. sect. Pithyusa was responsible for the incongruent phylogenetic signal. Morphologically, E. normannii is distinct, as are all three before-mentioned annuals, which fall in predominately perennial sections. However, the species most similar to E. normannii is E. falcata from E. sect. Pithyusa and therefore we propose inclusion of E. normannii in this section.

Chloroplast phylogeny of Triticum/Aegilops species is not incongruent with an ancient homoploid hybrid origin of the ancestor of the bread wheat D‐genome

2015 ◽  
Vol 208 (1) ◽  
pp. 9-10 ◽  
Author(s):  
Simen Rød Sandve ◽  
Thomas Marcussen ◽  
Klaus Mayer ◽  
Kjetill S. Jakobsen ◽  
Lise Heier ◽  
...  
Keyword(s):  
Bread Wheat ◽  
Hybrid Origin ◽  
Aegilops Species ◽  
D Genome ◽  
Homoploid Hybrid ◽  
Chloroplast Phylogeny

ITS sequence variation supports the hybrid origin of Malus toringoides Hughes

2007 ◽  
Vol 85 (7) ◽  
pp. 659-666 ◽  
Author(s):  
Ting-Ting Feng ◽  
Zhi-Qin Zhou ◽  
Jian-Min Tang ◽  
Ming-Hao Cheng ◽  
Shi-Liang Zhou
Keyword(s):  
Sequence Variation ◽  
Gene Tree ◽  
Natural Populations ◽  
Its Sequences ◽  
Nuclear Ribosomal Dna ◽  
Hybrid Origin ◽  
Putative Hybrid ◽  
Molecular Evidence ◽  
Sequence Information ◽  
Aflp Data

Malus toringoides (Rehd.) Hughes was suggested to have originated from hybridization between Malus transitoria Schneid. and Malus kansuensis Rehd., followed by repeated backcrossing to one of the putative parents. In the present study, the sequence information of the internal transcribed spacer (ITS) of nuclear ribosomal DNA (nrDNA) was used to re-examine the origin of this species. A total of 69 accessions from three natural populations (Maerkang, Xiaba and Kehe, Aba Autonomous Region, Sichuan, China) of M. toringoides and 10 accessions of its putative parents were analyzed. Using Malus angustifolia (Ait.) Michx., Malus ioensis (Wood) Britt. and Malus doumeri Chev. as outgroups, our phylogenetic analysis of the ITS sequences of M. toringoides and its putative parents showed that M. toringoides was not monophyletic, and two different types of ITS sequences which were obtained from each of the six accessions of M. toringoides were found to have clustered separately with those of the two putative parent species on the gene tree. A comparison of the sequence variation between M. toringoides and its putative parents revealed an additive variation pattern of ITS sequences in the putative hybrid species. These results are consistent with the previous morphological and amplified fragment length polymorphism (AFLP) data which suggested that M. toringoides was of hybrid origin. Our ITS data provide new molecular evidence for the hybrid origin hypothesis of M. toringoides and these results are of great importance for future study on hybridization, polyploid speciation and evolution of the genus Malus Miller.

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