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1.
五种珍珠菜的核型研究 总被引:6,自引:2,他引:4
本文对5种珍珠菜亚属植物进行了染色体数目及核型研究。其中瓣珍珠菜2n=24=12m+8sm+4st(2SAT)、黑腺珍珠菜2n=22=2m+4sm+6st+10t、泽珍珠菜2n=24=14m+6sm(2SAT)+4st和小叶珍珠菜2n=48=34m+10sm+4st的染色体数目及核型为首次报道。中国九江产的红根草核型2n=24=20m+4sm(2SAT)与日本产的核型2n=24=18m(1SAT) 相似文献
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七种药用植物的染色体研究 总被引:5,自引:1,他引:4
对山东7种药用植物的染色体进行了研究。结果表明:田旋花(ConvolvulusarvensisL)的染色体数目为2n=78;蜜柑草(PhylanthusmatsumuraeHavata)的染色体数目为n=88;挂红灯(PhysalisalkekengiLvarfrancheti(Mast)Makino)的染色体数目为2n=24,核型公式为K(2n)=24=2m+18sm+2st+2st(sat),核型“2A”型;无剌曼陀罗(DaturastramoniumLvarinermis(Jacq)SchinzetThel)的染色体数目为2n=24,核型公式为K(2n)=24=20m+4sm,核型“1B”型;决明(CasiatoraL)的染色体数目为2n=26,核型公式为K(2n)=26=24m+2sm,核型“1A”型;荔枝草(SalviaplebeiaRBr)的染色体数目为2n=16,核型公式为K(2n)=16=6m+10sm,核型“2A”型;车前(PlantagoasiaticaL)的染色体数目为2n=36,核型公式为K(2n)=36=32m+4sm,核型“1A”型。 相似文献
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报道了青海南部三种紫苑属植物的核型,染色体间期和前期 色体分别为复杂型和中间型,染色体数目均为2n=18,基数为x=9,中期染色体主要由中部与亚中着丝点染色体组成。 相似文献
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安徽黄精属的细胞分类学研究 总被引:10,自引:3,他引:7
本文首次报道黄精属PolygonatumMill我国三种特有植物的染色体数目和核型,结果如下:安徽黄精P.anhuiense发现两个细胞型:(1)2n=24=4m+6sm+14st;(2)2n=20=4m十6sm+10st; 黄精P.langyaensy2n=18=6m+8sm+4t;距药黄精P.franchetii有三个细胞型:(1)2n=22=8m+8sm(2sc)+6st;(2)2n=20=2m+14sm+4st;(3)2n=18=4m+8sm+4st+2T,全部属3B核型。黄精属植物安徽共有10种,本文对9种黄精的染色体数目、核型进行了比较研究,发现它们可划分成三个类群,与中国植物志(第十五卷)的形态分类基本相符。 相似文献
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山东10种植物的核型分析 总被引:6,自引:1,他引:5
对山东10 种植物进行了核型分析。茴茴蒜( Ranunculuschinensis Bge-) 染色体数目2n =16 , 核型公式K(2n) = 2x = 16 = 2 M + 2m + 2sm + 10st, “3A”类型; 五脉地椒( Thymusquinquecostatus Celak-) 染色体数目2n= 26 , 核型公式K (2n) = 2x= 26 = 8 M + 18m , “1A”类型; 蛇床( Cnidium monnieri(L-) Cuss-) 染色体数目2n= 20 , 核型公式K (2n) = 2x= 20 = 2M+ 16m + 2sm , “2B”类型; 波斯菊( Cosmos bipinnatus Cav-) 染色体数目2n = 24 , 核型公式K(2n) = 2x = 24 = 16m + 2m (sat) + 6sm , “2A”类型; 白车轴草( Trifolium repens L-) 染色体数目2n= 32 , 核型公式K (2n) = 4x = 32 = 32m , “1A”类型; 铁苋菜( Acalypha australis L-)染色体数目2n = 32 , 核型公式K (2n) = 2x= 32 = 32m , “1B”类型; 地构叶( Speranskia t? 相似文献
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Reported in the present paper are chromosome numbers and karyotypes of three
genera of the Gesneriaceae, i.e. Ancylostemon Craib. , Briggsiopsis (Franch.) K. Y. Pan
and Lysionotus D. Don. The former two genera are endemic to China. The karyotype of
Ancylostemon aureus (Franch.) Burtt is formulated as 2n = 34 = 20m(1sat) + 14sm, with
the same chromosome number as its allied species A. convexus Craib. This species is characterized by the interphase nucleus of complex chromocenter type and the proximal type of
chromosomes in the mitotic prophase. The chromosome number of the monospecific genus
Briggsiopsis is 2n = 34, the same as the lowest chromosome number reported in Briggsia.
The karyotype of Briggsiopsis, which is formulated as 2n = 25m + 6sm + 3st, also seems to
be primitive among the species of the two genera. Briggsiopsis is characterized by the interphase nucleus of simple-complex chromocenter type and the interstitial-gradient type of chromosomes in the mitotic prophase. The chromosome number of Lysionotus carnosus Hemsl. is
the lowest reported in this genus. Its karyotype is formulated as 2n= 30 = 21m + 5sm + 3st
+ lt. Lysionotus serratus var. pterocaulis, with the karyotype being formulated as 2n= 32
= 2lm + 10sm + lt, has the same chromosome number as var. serratus. These two species
show a remarkable differentiation of karyotypes and are characterized by the interphase nuclei
of simple-complex chromocenter type and the gradient type of chromosomes in the mitotic
prophase. _ . 相似文献
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This paper reports chromosome numbers of ten species and one variety
of the genus Campylotropis from China (Table 1, Plate 1 ). They are C. argentea
Schindl., C. bonatiana( pamp: ) Schindl., C. henryi Schindl., C. hirtella
(Franch.)Schindl., C. macrocarpa(Bunge )Rehd., C. diversifolia( Hemsl. )Schindl.,
C. polyantha (Franch.) Schindl., C. polyantha( Franch. )Schindl. var.
leiocarpa ( Pamp. ) Pet. -Stib., c. prainii ( Coll. et Hemal. ) Schindl., C.
pinetorum (kurz)Schindl. ssp. velutina (Dunn)Schindl., c. trigonoclada(Franch. )
Schindl. The chromosome numbers of these ten species are all 2n= 22 or n= 11,
but a few individuals in C. polyantha(Franch. )Schindl. var. leiocarpa(Pamp. )Pet.
-Stib., were found aneuploid with 2n=23. The chromosome numbers of c.
polyantha and C. macrocarpa have been reported by Maw-shing (1986)andLee(1972), while those of all the other species are first reported. 相似文献
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A report of chromosome numbers for eight species endemic to China is
made in the paper, including first counts for 4 genera and 4 species and first karyotypic analyses of two species.
Sinojohnstonia chekiangensis (Migo) W. T. Wang (Boraginaceae) 2n=24*;
Coptis chinenis Franch (Ranunculaceae) 2n=18**;
Dichocarpum dalzielii (Drumm. et Hutch.) W. T. Wang et Hsiao (Ranunculaceae)
2n=24*;
Eomecon chionantha Hance (Papaveraceae) 2n=18;
Camptotheca acuminata Dcne. (Nyssaceae) 2n=44;
Calycanthus chinensis Cheng et S. Y. Chang (Calycanthaceae) 2n=22**;
Eucommia ulmoides Oliv. (Eucommiaceae) n=17;
Pinellia pedatisecta Schott (Araceae) 2n=26;
The previous reports of chromosome numbers of the same groups are compared with
our own (See Table 1). The vouchers for the present study are preserved in the Herbarium of Futan University. 相似文献
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P. CUBAS C. PARDO D. SANCHEZ-MATA P. CANTÓ 《Botanical journal of the Linnean Society. Linnean Society of London》1998,128(4):423-434
Karyological information about Iberian Genista species is limited because of their wide geographical distribution. It is a major factor in the understanding of a genus whose genetic evolution is mostly related to aneuploidy and euploidy. The chromosome numbers of the following taxa have been counted: G. carpetana subsp. carpetana (n = 20), G. cinerascens (n = 12), G. micrantha (n = 18), G. mugronensis subsp. rigidissima (n = 18), G. ramosissima (2n = 48) and G. tinctoria (n = 24). The previously-assumed uniformity of chromosome number (n = 24) for all the subspecies of G. cinerea is supported here by data from subspp. murcica and speciosa. In G. florida, a new chromosome number, n = 23, has been found for both subspecies (florida and polygaliphylla). A discussion of the discrepancies between these data and previous ones is included. A new level of ploidy has been found in G. tuurnefortii subsp. tournefortii (n = 32). The data stress the necessity of obtaining chromosomal information from a number of plants of a taxon before its characteristic number is clear, and indicate that more chromosomal data will help the understanding of the cytological diversity within taxa in Genista. 相似文献
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中国独活属的核型研究 总被引:6,自引:0,他引:6
本文首次报道了我国独活属10种(含1变种)的核型,其中8种的染色体数目亦为首次报道。研究表明它们的染色体数目均为2n=2x=22,为二倍体,其核型为中部着丝点和亚中部着丝点染色体组成,仅具1A和2A两种类型。有4种具随体染色体,在部分H.vicinum植株中发现有1条B染色体,在H.millefolium var.longilobum中同时存在2n=22和2n=24的非整倍体.不同种的染色体形态不同,为分类研究提供了细胞学依据。 本文在核型分析基础上讨论了该属分类群的划分、种间亲缘关系及演化,并结合我国毗邻地区该属细胞学资料和地理分布规律,提出我国西南部的横断山区是独活属的频度中心和多样性中心。 相似文献
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珍珠菜属四种植物的核型分析 总被引:2,自引:0,他引:2
对珍珠菜属4种植物的核型进行了研究。结果表明,叶头过路黄(Lysimachia phyllocephala Hand.-Mazz.)的核型为:2n=2x=24=2m 6sm 2st 14t,茂汶过路黄(L. stellarioidesHand.-Mazz.)的核型为:2n=2x=24=4m 2sm 18t,均属首次报道。矮桃(L. clethroidesDuby)的核型为:2n=2x=24=16m 8sm(1SAT),腺药珍珠菜(L. stenosepala Hemsl.)的核型为:2n=2x=24=10m 12sm 2st,与前人报道的有所不同。还对该属已报道的23种植物的核型进行了比较。 相似文献
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Nineteen populations of fifteen species ofGentiana sect.Chondrophyllae from China were observed cytologically.Gentiana alsinoides, G. anisostemon, G. asterocalyx, G. exigua, G. heterostemon, G. intricata, G. praticola, G. pseudoaquatica, G. spathulifolia, andG. subintricata all had the same chromosome number of 2n = 20 (or n = 10), whereasG. piasezkii had 2n = 36,G. squarrosa 2n = 38,G. prattii 2n = 18,G. aristata 2n = 14 (n = 7), andG. heleonastes 2n = 12. All these chromosome numbers are documented here for the first time, except forG. squarrosa, where it is a new number report. The basic numbers of x = 6, x = 7 and x = 19 are new for the section. Karyotype analyses of some species revealed that, except for a few cases, the species examined mainly had metacentric chromosomes. 2n = 20 = 2m(SAT) + 18m was found to be the main type of karyotype for the species with 2n = 20. Chromosomal evolution and its mechanism in this section are also discussed. 相似文献
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三种龟类动物的细胞遗传研究 总被引:2,自引:0,他引:2
本文以外周血淋巴细胞为材料,首次报道马来闭壳龟和地龟的核型,G带,C带和Ag-NORs,以及平胸龟的G带和C带,发现平胸龟的核型与前人报道的有差异。研究结果表明:平胸龟2n=54(14M+4ST+8T+28m),N.F.=72,7+6+14。A组No.6q per有一次缢痕。Ag-NORs位于A组的No.7 q ter。其全部染色体的着丝粒区均显示阳性C带,并且A组的No.7整条异染色质化;马来闭 相似文献