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首页> 外文期刊>Cytology and genetics >New Base Number for the Chromosomally Abnormal Genus Arthraxon P. Beauv. from Rajasthan
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New Base Number for the Chromosomally Abnormal Genus Arthraxon P. Beauv. from Rajasthan

机译：染色体异常的新碱基序列亚蒽醌P. Beauv。来自拉贾斯坦邦

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摘要

During present investigation, 4 populations covering 3 species of the genus Arthraxon P. Beauv. have been worked out cytologically from different localities of Indian hot desert, Rajasthan. Two of the three species show n = 14 (A. lanceolatus and A. lancifolius), whereas, A. hispidus show the chromosome count of n= 18. A. lanceolatus show varaiable sized bivalents i.e. two large and twelve small sized bivalents, whereas, A. lancifolius shows normal equal sized bivalents. These large sized bivalents previously might be confused with quadrivalents but during A-I it clearly indicates the chromosome count of 2n = 28. It (n = 14) is the first time reported chromosomal count for the species of the genus from the world with new proposed base number x = 7 and thus the species are considered to be tetraploid. All the three species are the first chromosome reports from Rajasthan with various meiotic abnormalities like laggards, multiple bridges, cytomixis, chromatin transfer which results in abnormal microsporogenesis and low pollen viability.
机译：在现有调查期间，涵盖了3种亚蒽属P. Beauv的4种群体。已从印度热沙沙坦的不同地方进行过度地研究。三种物种中的两种展示N = 14（A. Lanceolatus和A. Lancifirius），而A. Hispidus展示了n = 18的染色体计数。A. Lanceolatus展示可变尺寸的二价二偶，即两个大型和十二个小尺寸的比例，而，A. LANCIFOLIUS显示正常的相等大小的二价比值。这些大型尺寸的二价比例可能与四肢级混淆，但在ai期间，它清楚地表明了2n = 28的染色体计数。它（n = 14）是第一次报告来自世界各地的染色体计数来自世界新的底座。数x = 7，因此物种被认为是四倍体。所有这三种物种都是Rajasthan的第一个染色体报告，其具有落后的落后片，多座桥，细胞膜，染色质转移等各种Feiotic异常，这导致染色体发生异常和低花粉活力。

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