Arid
DOI10.1071/BT10312
New insights into the polyploid complex Cenchrus ciliaris L. (Poaceae) show its capacity for gene flow and recombination processes despite its apomictic nature
Kharrat-Souissi, Amina1; Baumel, Alex2; Torre, Franck2; Juin, Marianick2; Siljak-Yakovlev, Sonja3; Roig, Anne4; Chaieb, Mohamed1
通讯作者Kharrat-Souissi, Amina
来源期刊AUSTRALIAN JOURNAL OF BOTANY
ISSN0067-1924
出版年2011
卷号59期号:6页码:543-553
英文摘要

Cenchrus ciliaris L. is a C-4 perennial grass of arid lands which is under the focus of different ecological issues such as response to desertification, quality of forage grass and impacts of invasions. Here, molecular and morphological analyses of the genetic diversity of several Tunisian provenances of C. ciliaris were performed to better understand the phenotypic polymorphism of this agamospermous and polyploid grass. Ten phenotypic traits associated with productivity were measured in a common garden environment. Amplified Fragment Length Polymorphism (AFLP) markers were developed to investigate the structure of genetic diversity among and within provenances and between the three ploidy levels. Heritable phenotypic traits showed considerable differences within provenances. Surprisingly, AFLP markers revealed the existence of genotypic variations between individuals of the same sibship and a high G/N value (0.55). A neighbour-joining tree based on AFLP markers revealed three major groups; tetraploid, pentaploid and a mix of pentaploid and hexaploids. These groups do not correspond completely to the geographical origin of samples. The results underline the possibility of sexual reproduction, recombination and gene flow within and between populations of C. ciliaris. In respect with the well known dynamic nature of polyploid genomes, these results should have strong consequences for the future management of this grass for both conservation and invasion issues.


类型Article
语种英语
国家Tunisia ; France
收录类别SCI-E
WOS记录号WOS:000295534600005
WOS关键词FACULTATIVE APOMIXIS ; REMNANT POPULATIONS ; CLONAL DIVERSITY ; GRASS ; BUFFELGRASS ; AFLP ; DESERTIFICATION ; ASTERACEAE ; STABILITY ; PASTURE
WOS类目Plant Sciences
WOS研究方向Plant Sciences
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/167304
作者单位1.Univ Sfax, Fac Sci, Dept Biol, Lab Biol & Ecophysiol Vegetaux Milieu Aride, Sfax, Tunisia;
2.UMR CNRS IRD 6116 IMEP, Inst Mediterraneen Ecol & Paleoecol, F-13545 Aix En Provence 04, France;
3.Univ Paris 11, UMR 8079, Dept Biodivers Systemat & Evolut, Orsay, France;
4.Ctr INRA PACA, Domaine St Paul URFM, Unite Ecol Forets Mediterraneennes, F-84914 Avignon, France
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Kharrat-Souissi, Amina,Baumel, Alex,Torre, Franck,et al. New insights into the polyploid complex Cenchrus ciliaris L. (Poaceae) show its capacity for gene flow and recombination processes despite its apomictic nature[J],2011,59(6):543-553.
APA Kharrat-Souissi, Amina.,Baumel, Alex.,Torre, Franck.,Juin, Marianick.,Siljak-Yakovlev, Sonja.,...&Chaieb, Mohamed.(2011).New insights into the polyploid complex Cenchrus ciliaris L. (Poaceae) show its capacity for gene flow and recombination processes despite its apomictic nature.AUSTRALIAN JOURNAL OF BOTANY,59(6),543-553.
MLA Kharrat-Souissi, Amina,et al."New insights into the polyploid complex Cenchrus ciliaris L. (Poaceae) show its capacity for gene flow and recombination processes despite its apomictic nature".AUSTRALIAN JOURNAL OF BOTANY 59.6(2011):543-553.
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