Diversity of chromosome numbers and meiotic studies in genus Anchusa (Boraginaceae) from Iran (10 Nov 2015)

M. Almasi, M. Ranjbar
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Abstract

The present study reports the chromosome number and meiotic behaviour of 14 populationsbelonging to four taxa of Anchusa subgenus Buglossum Gusul. from Iran. All populationsshowed the chromosome number 2n= 4x= 32. It is the first meiotic study for A. subg.Buglossum. We discuss some habit form and evolutionary aspect in the light of cytogeneticdata. The origin of polyploidy (auto-allopolyploidy) were also surveyed. As the result of thepresent study and reviewing the chromosome numbers in Anchusa subg. Buglossum and A.subg. Buglossoides Gusul. in Iran, it can be concluded that polyploidy is the major forcemodeling the chromosome evolution within these subgenera. Almost all the studied taxadisplayed regular bivalent pairing and chromosome segregation at meiosis. However, somemeiotic abnormalities observed in different taxa are discussed here.
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伊朗凤头莲属植物染色体数目多样性及减数分裂研究(2015年11月10日)
本文报道了安丘亚属(Buglossum Gusul) 4个分类群14个居群的染色体数目和减数分裂行为。来自伊朗。所有种群的染色体数均为2n= 4x= 32。这是首次对毛菖蒲进行减数分裂研究。结合细胞遗传学资料,讨论了一些习性形成和进化方面的问题。多倍体(自异源多倍体)的起源也进行了调查。本文通过对Anchusa亚属植物染色体数目的研究和综述。蒲公英和A.subgBuglossoides Gusul。在伊朗,可以得出结论,多倍体是这些亚属中染色体进化的主要力量。几乎所有研究的分类在减数分裂时都表现出规律的二价配对和染色体分离。然而,在不同的分类群中观察到的染色体异常在这里进行了讨论。
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