干旱区生态环境知识资源中心(Arid): Cytotaxonomic investigation and meiotic behavior of natural populations of genus Avena in Algeria

Arid

DOI	10.1007/s10681-019-2490-6
	Cytotaxonomic investigation and meiotic behavior of natural populations of genus Avena in Algeria
	Aissat, Assia; Amirouche, Rachid; Amirouche, Nabila
通讯作者	Amirouche, Nabila
来源期刊	EUPHYTICA
ISSN	0014-2336
EISSN	1573-5060
出版年	2019
卷号	215 期号:10
英文摘要	Karyotype and meiotic analysis were performed on forty-five natural populations of genus Avena sampled in contrasting bioclimatic areas of Northern Africa. The diploids (2n = 2x = 14) A. clauda, A. eriantha and A. hirtula are sporadic in hills and mountains of the Tellian Atlas only. A. wiestii (2x) are scattered in arid and semi-arid regions, of which an unexpected 4x population has been discovered. A. barbata (4x) and A. sterilis (6x) are widespread in all bioclimates while A. fatua (6x) is rather rare. Most populations show remarkable novelties in the intra and inter karyotype asymmetry indexes, particularly the 4x cytotype of the endemic A. macrostachya which has almost exclusively metacentric chromosomes. Both 2x, 4x and 6x annual species display regular meiosis with generally bivalent association. Univalents, multivalents, laggards, bridges, asynchronous divisions and micronuclei were often observed. Meiotic behavior observed for the first time in the locus classicus of A. macrostachya, indicate constant occurrence of one or two tetravalents. Meiotic features together with the main bioclimatic parameters, were submitted to a principal component analysis. Significant correlations were found particularly between frequencies of multivalents and laggards with the Mediterranean bioclimatic coefficient and the maximum temperature of the hottest month. These new cytogenetic data have been discussed in the context of the geographical distribution of diploids and polyploids and the aftermath of the local environmental stress conditions on the meiotic process within natural populations.
英文关键词	Aveneae Karyotype Meiosis Polyploidy Wild populations Bioclimate
类型	Article
语种	英语
国家	Algeria
收录类别	SCI-E
WOS记录号	WOS:000485259100003
WOS关键词	COMPARATIVE CYTOGENETIC ANALYSIS ; CHROMOSOMAL DIFFERENTIATION ; SPECIES RELATIONSHIPS ; C-GENOME ; L. ; KARYOTYPE ; POACEAE ; EVOLUTION ; MACROSTACHYA ; SPECIATION
WOS类目	Agronomy ; Plant Sciences ; Horticulture
WOS研究方向	Agriculture ; Plant Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/215572
作者单位	USTHB, Fac Biol Sci, LBPO Lab, Team Biosystemat Genet & Evolut, POB 32, Algiers 16111, Algeria
推荐引用方式 GB/T 7714	Aissat, Assia,Amirouche, Rachid,Amirouche, Nabila. Cytotaxonomic investigation and meiotic behavior of natural populations of genus Avena in Algeria[J],2019,215(10).
APA	Aissat, Assia,Amirouche, Rachid,&Amirouche, Nabila.(2019).Cytotaxonomic investigation and meiotic behavior of natural populations of genus Avena in Algeria.EUPHYTICA,215(10).
MLA	Aissat, Assia,et al."Cytotaxonomic investigation and meiotic behavior of natural populations of genus Avena in Algeria".EUPHYTICA 215.10(2019).