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Evolution of apomixis loci in Pilosella and Hieracium (Asteraceae) inferred from the conservation of apomixis-linked markers in natural and experimental populations
ML. Hand, P. Vít, A. Krahulcová, SD. Johnson, K. Oelkers, H. Siddons, J. Chrtek, J. Fehrer, AM. Koltunow,
Jazyk angličtina Země Anglie, Velká Británie
Typ dokumentu časopisecké články, práce podpořená grantem
NLK
Free Medical Journals
od 2011
PubMed Central
od 2011 do Před 1 rokem
Europe PubMed Central
od 2011 do Před 1 rokem
ProQuest Central
od 2000-01-01 do Před 1 rokem
Open Access Digital Library
od 1947-01-01
Medline Complete (EBSCOhost)
od 1996-01-01 do 2015-12-31
Health & Medicine (ProQuest)
od 2000-01-01 do Před 1 rokem
Public Health Database (ProQuest)
od 2000-01-01 do Před 1 rokem
PubMed
25026970
DOI
10.1038/hdy.2014.61
Knihovny.cz E-zdroje
- MeSH
- apomixie genetika MeSH
- Asteraceae genetika MeSH
- biologická evoluce * MeSH
- DNA chloroplastová genetika MeSH
- DNA rostlinná genetika MeSH
- genetické lokusy * MeSH
- genetické markery MeSH
- haplotypy MeSH
- konzervovaná sekvence MeSH
- molekulární sekvence - údaje MeSH
- populační genetika MeSH
- regulace genové exprese u rostlin MeSH
- rostlinné geny * MeSH
- semena rostlinná genetika MeSH
- typy dědičnosti MeSH
- Publikační typ
- časopisecké články MeSH
- práce podpořená grantem MeSH
The Hieracium and Pilosella (Lactuceae, Asteraceae) genera of closely related hawkweeds contain species with two different modes of gametophytic apomixis (asexual seed formation). Both genera contain polyploid species, and in wild populations, sexual and apomictic species co-exist. Apomixis is known to co-exist with sexuality in apomictic Pilosella individuals, however, apomictic Hieracium have been regarded as obligate apomicts. Here, a developmental analysis of apomixis within 16 Hieracium species revealed meiosis and megaspore tetrad formation in 1 to 7% of ovules, for the first time indicating residual sexuality in this genus. Molecular markers linked to the two independent, dominant loci LOSS OF APOMEIOSIS (LOA) and LOSS OF PARTHENOGENESIS (LOP) controlling apomixis in Pilosella piloselloides subsp. praealta were screened across 20 phenotyped Hieracium individuals from natural populations, and 65 phenotyped Pilosella individuals from natural and experimental cross populations, to examine their conservation, inheritance and association with reproductive modes. All of the tested LOA and LOP-linked markers were absent in the 20 Hieracium samples irrespective of their reproductive mode. Within Pilosella, LOA and LOP-linked markers were essentially absent within the sexual plants, although they were not conserved in all apomictic individuals. Both loci appeared to be inherited independently, and evidence for additional genetic factors influencing quantitative expression of LOA and LOP was obtained. Collectively, these data suggest independent evolution of apomixis in Hieracium and Pilosella and are discussed with respect to current knowledge of the evolution of apomixis.
Citace poskytuje Crossref.org
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