Karyological data of 47 accessions of 28 Artemisia (Asteraceae, Anthemideae) species from Iran, with first new reports for Iranian populations and first absolute counts in three species
Karyological data of 47 accessions of 28 Artemisia (Asteraceae, Anthemideae) species from Iran, with first new reports for Iranian populations and first absolute counts in three species
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来自伊朗的 28 种蒿属（菊科、花科）47 个种质的核学数据，首次获得伊朗种群的新报告，以及三个物种的首次绝对计数
DOI：
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发表时间：
2013
影响因子：
1.9
通讯作者：
S. A. Shahzadeh Fazeli
中科院分区：
文献类型：
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作者：
A. Dolatyari;J. Vallès;M. Naghavi;S. A. Shahzadeh Fazeli
代表 28 个蒿属物种的 47 个种质的体细胞染色体编号由伊朗提供。发现了两个基本染色体编号，x = 8、9，每个编号都有二倍体、四倍体和六倍体水平。不同的染色体编号，2n = 16、16 + 1B、16 + 5B、32、48 和 2n = 18、18 + 1B、19、36、36 + 1B、36 + 2B、37、49 + 2B、49 + 3B、51 + 6B、在研究的材料中鉴定出 54、54 + 1B、54 + 3B、54 + 5B。首次报告了三个物种的染色体数量，四个物种的计数对于伊朗来说是新的，其他计数已与之前的数据进行了彻底的比较。 40% 的研究材料是多倍体，17% 的材料报告有 B 染色体。非整倍性和异体性是其他相关的细胞学现象。估计一些核学参数，核型总长度，核型公式，着丝粒指数平均值，平均臂比，A1和A2指数，以数字方式表征核型。 A1和A2指数显示多倍体和异倍体类群的核型往往不对称。对所有核学参数的 PCA 分析显示出一些系统和进化意义。对所有这些染色体数量和细胞遗传学机制的考虑使我们推断出该属染色体进化的不同模式。
Somatic chromosome numbers of 47 accessions representing 28 Artemisia species are provided from Iran. Two basic chromosome numbers, x = 8, 9, each with diploid, tetraploid and hexaploid levels, were found. Different chromosome numbers, 2n = 16, 16 + 1B, 16 + 5B, 32, 48, and 2n = 18, 18 + 1B, 19, 36, 36 + 1B, 36 + 2B, 37, 49 + 2B, 49 + 3B, 51 + 6B, 54, 54 + 1B, 54 + 3B, 54 + 5B, in studied accessions were identified. Chromosome numbers are reported for the first time in three species, counts in four species are new for Iran, and other counts have been thoroughly compared to previous data. Forty percent of the studied accessions are polyploid and B-chromosome(s) are reported in 17 % of accessions. Aneuploidy and aneusomy are other relevant cytological phenomena. Some karyological parameters, total karyotype length, karyotype formula, mean value of centromeric indices, mean arm ratio, A1 and A2 indices, were estimated to characterize the karyotypes numerically. A1 and A2 indices showed that karyotypes tend to be asymmetric in polyploid and dysploid taxa. PCA analysis of all karyological parameters has shown some systematic and evolutionary implications. The consideration of all these chromosome numbers and cytogenetic mechanisms has led us to infer the different patterns of chromosomal evolution in the genus.