Study on Karyotypes of Six Species in Angelica from Sichuan,China

Karyotypes of 6 species in Angelica L . from Sichuan are studied at population level and the karyotype of A. pseudoselinum is firstly reported . It is found that the number of chromosomes are invariably 2n = 2x =22 , with most of them are median and submedian centromeric chromosomes, while subterminal centromeric chromosomes exist in A. omeiensis . The majority of karyotypes belong to 2A, and Shihuiyao population of A. laxifoliata has 1A types . As for karyotypic formula , A. omeiensis is 2n =22 = 10m+ 2sm+ 10st , A. maowenensis is 2n =22= 16m+ 4sm+ 2sm (SAT) , A. sinensis is 2n = 22 = 14m+ 8sm, A. apaensis is 2n = 22 = 14m+8sm, and A. pseudoselinum is 2n =22 = 12m+ 8sm+2sm (SAT ) . However, different populations of A. laxiforliata don’t have the same karyotypic formulae, and there are some variations between the caryotypes more or less . According to Stebbins, A. omeiensis’s evolution status was showed by the highest index of asymmetry among six species studied in this paper , while A. laxiforliata is a little primitive because of its lower index of asymmetry and its 1A caryotypes . However , the morphological, anatomic , karyotypic characters and that of pollen grains are evolving asynchronously , suggesting that, Sichuan as one of the frequency centers of Angelica L . in China , is also one of thedifferentiation centers of Angelica L .     

四川当归属六种植物的核型

从居群水平对四川当归属(AngelicaL.)6种植物的核型进行了研究,其中管鞘当归核型为首次报道。6个种的染色体均为2n=2x=22,多为中部和近中部着丝粒染色体,核型多为2A型,仅疏叶当归石灰窑居群为1A型;峨眉当归核型为2n=22=10m 2sm 10st,茂汶当归核型为2n=22=16m 4sm 2sm(SAT),当归核型为2n=22=14m 8sm,阿坝当归核型为2n=22=14m 8sm,管鞘当归核型为2n=22=12m 8sm 2sm(SAT),而疏叶当归不同居群的核型或多或少发生了不同程度的变异。参照Stebbins的观点,峨眉当归以核型不对称系数最高而在6个种中显示一定的核型进化性,疏叶当归不对称系数较低,且出现1A型核型因而体现出一定的原始性。但是,综合形态解剖、花粉性状以及核型特征可以看出,四川当归属植物各性状间具有进化的不同步性,这也表明,作为当归属分布频度中心之一的四川地区,同时也是当归属的分化中心之一。     

国产磨芋属的染色体核型报道(1)

本文报道了磨芋属(Amorphophallus Blume)六个种的染色体数目和核型,其中5个种属于首次报道。其核型公式如下: 1.滇磨芋 K(2n)=2x=26=26m.2.磨芋 K(2n)=2x=26=26m.3.攸落磨芋K(2n)=2x=26=22m(2SAT)+4sm.(2SAT).4.西盟磨芋 K(2n)=2x=26=20m+4sm+2st.5.勐海磨芋 K(2n)=2x=26=22m+4sm.6.白磨芋 K(2n)=2x=26=20m(2SAT)+6sm。     

五种苏铁属植物的核形态

报道了苏铁属（Cycas L.)5种植物的染色体数目和核型,除多歧苏铁外,其他种均为首次报道。5个种的体细胞中期染色体核型公式分别为：滇南苏铁C.diannanensis K(2n)=2x=22=2m 4sm 4st 12T;潭清苏铁C.tanqingii K(2n)=2x=22=2m 8sm 2st 10T;多歧苏的Cmultipinnata K(2n)=2x=22=4m 8st 2st 8T;巴兰萨苏铁C.balansae K(2n)=2x=xx=2m 4sm 6st 10T。石山苏铁C.miquelii K(2n)=22=2m 6sm(1SAT) 4st 10T;核型均属于3B型。本研究结果支持苏铁属植物的核型从不对称进化的观点;同时,支持将巴兰萨苏铁和石山苏铁归入攀枝花苏铁组的台湾苏铁亚组的观点。     

甘肃萱草属植物的核型研究

本文研究了甘肃萱草属6种、1变种的染色体核型;黄花菜K(2n)=22=12m+10sm(2SAT);小黄花菜K(2n)=22=10m+12sm;北萱草K(2n)=22=8m+14sm;北黄花菜K(2n)=22=14m+6sm+2st;萱草K(2n)=22=12m+8sm+2st;重瓣萱草K(2n)=33=18m+12sm+3st:折叶萱草K(2n)=22=10m+10sm+2st。以上核型可自然地分成两大类群,第一类群包括小黄花菜、北萱草、黄花菜;第二类群包括折叶萱草、萱草、重瓣萱草、北黄花菜。     

Studies on Karyotypes of Two Species in Kengyilia and Three Species in Roegneria

The karyotypes of 3 species of Roegneria and 2 species of Kengyilia were analysed in this paper. They are all reported for the first time, and the karyotype formulae are as follows: R. nutans, 2n = 4X= 28 = 26m+ 2sm; R. abolinii, 2n = 4X =28 = 24m + 4sm; R. aristiglumis, 2n = 6X = 42 = 32m + 10sm (2sat); K. tahelacana 2n = 6X = 42 = 36m (2sat)+6sm (2sat); K. zhoasuensis, 2n = 6X= 42 = 34m(4sat)+ 8sm. According to the characters of karyotypes, K. tahelacana and K. zhoasuensis havethe S, Y, P genomes of genus Kengyilia.     

鹅观草属5种植物的核型研究

本文首次对我国5种鹅观草属Roegneria植物的核型进行了分析。5个种的染色体数目均为2n=4x=28。它们的核型是:高株鹅观草 R.altissima,2n=4x=28=26m+2sm(SAT);假花鳞草 R.anthosachnoides,2n=4x=28=22m+4sm+2sm(SAT);长芒鹅观草 R.dolichathera,2 n=4x=28=20m+6sm+2sm(SAT);林地鹅观草 R.sylva-tica,2n=4x=28=22m+4sm+2sm(SAT);多变鹅观草R.varia,2n=4x=28=20m+6sm+2sm(SAT)。它们的核型均属2A型,每种植物均有一对随体染色体。     

Karyotypes of Eleven Species of Triticeae in Northeast China

In this paper the karyotypes of eleven species of Triticeae from Northeast China are reported. The karyotype formulae are as follows: Agropyron cristatum, 2n=4x=28=20m+8sm; Elytrigia repens, 2n=6x=42=34m(2SAT) + 8sm; Hordeum brevisubulatum, 2n = 4x = 28 = 20m + 8sm( 4SAT ); Roegneria nakaii, 2n = 4x = 28 = 20m + 8sm( 4SAT ); R. turczaninovii var. macrathera, 2n = 4x = 28 = 20m(2SAT ) + 8sm(2SAT ); Elymus sibiricus, 2n = 4x = 28 = 20m + 8sm ( 4SAT); E. dahuricus, 2n=6x=42=32m+10sm( 6SAT); E. excelsus, 2n=6x=42=32m+10sm( 6SAT); Leymus chinensis, 2n=4x=28=20m(4SAT) + 8sm; Roegneria ciliaris, 2n = 4x = 28 = 22m( 2SAT ) + 6sm( 2SAT ); R. kamoji, 2n= 6x = 42= 30m+ 12sm(4SAT). The karyotypes of the first five species are re-ported for the first time.     

Studies on the Origin of the Traditional Chinese Drug Fuxiong and Its Relationships with Ligusticum chuanxiong and L. sinense

The vegetative characters of Ligusticum chuanxiong Hort. cv. Fuxiong are described in comparison with L. chuanxiong Hort. and L. sinense Oliv. The chromosome numbers and karyotypes of the three taxa were studied in root tip cells by Feulgen’s squash method. Their karyotypes are determined as follows: L. chuanxiong, K(2n)=22=16 m+ 4sm+2st (sat); L. chuanxiong cv. Fuxiong, K(2n)=33=24 m+6sm+3st (sat); L. sinense, K(2n)=22=12 m+6sm+2sm (sat)+2st (sat). The karyotypic similarities are found between L. chuanxiong and its cultivariety, butthe former is a diploid while the latter probably is a homologous triploid.     

葱属植物物种生物学研究 Ⅰ.葱属6种材料的核型研究

分析了葱属(Allium L.)5个种6个居群的细胞学特征。这些种是太白韭(A.prattii C.H.Wright apud Forb.et Hemsl.),该种包括两个居群(Ⅰ、Ⅱ)。居群Ⅰ:K(2n)=2x=16=9m+1m(SAT)+4sm+2st,居群Ⅱ:K(2n)=2x=16=10m+5sm+1sm(SAT);天蒜(A.paepalanthoides Airy-Shaw):K(2n)=2x=16=14m+2sm+3B;多叶韭(A.Plurifoliatum Rendle):K(2n)=2x=16=14m+2sm+1B;合被韭(A.tubiflorum Rendle):K(2n)=2x=16=12m+2m(SAT)+2sm;峨眉韭(A.omeiense Z.Y.Zhu):K(2n)=2x=22=2m+18sm+2T(SAT)。所研究的6批材料均为二倍体,除合被韭的核型为“1A”型,蛾眉韭的核型为“3A”型外,其余4批材料的核型均为“2A”型。其中峨眉韭和多叶韭的染色体数目为首次报道,天蒜和多叶韭的细胞中首次发现B染色体,并对其相互关系进行了探讨。     

东北蒿属艾组12种植物核型研究

报道东北蒿属艾组12种植物的染色体数及核型资料,结果如下：宽叶山蒿（Artemisia stolonifera (Maixm.)Komar.)2n=4x=36=28m 4sm(4SAT) 4st(4SAT);野艾蒿（A.lavandulaefolia DC)2n=2x=50=40m 4sm 6st(6SAT); 矮蒿（A.lancea Van.)2n=2x=16=10m 4sm 2st;蒙古蒿（A.mongolica (fisch.ex Bess.)Nakai]2n=2x=16=14m 2st;红足蒿（A.rubripes Nakai)2n=2x=16=14m 2st;歧茎蒿（A.igniaria Maixm.)2n=2x=34=28m 2sm 4st(4SAT);柳叶蒿（A.integrifolia Linn.)2n=4x=36=20m 12sm 4st;线叶蒿（A.subula 4st(4SAT);柳叶蒿（A.integrifolia Linn.)2n＝4x=36=20m 12sm 4st;线叶蒿（A.subulata Nakai)2n=2x=16=14m 2st;高岭蒿（A.brachyphylla Kitam.)2n=2x=18=14m 2sm 2st;林文稿[A.uiridissima(Komar.)Pamp.]2n=2x=18=14m 4sm;奄癌（A.keiskeana Miq.)2n=2x=18=16m 2sm;阴地蒿（A.sylvatica Maxim.)2n=2x=16=14m 2sm,核型对称性野艾蒿（A.lavandulaefolia)为2B型,其余均为2A型,依据核型资料对个别种的演化 分类进行了初步探讨。     

Karyotype Comparison of Populus SectTacamahaca

The paper identified and compared the karyotypes of 10 species(varieties) of Populus sectTacamhaca.The results were as follows:Ppseudo simonii Kitag.2n=38=27m+6sm(1SAT)+4st(2SAT)+1t(1SAT);Ptrichocarpa Torr.2n=38=2M+18m(1SAT)+8sm+10st(1SAT);Pcathayana Rehd.var.Beijing 2n=38=1M+24m+6sm+7st(2SAT);Pבpopularis’ 2n=38=3M+27m+2sm(1SAT)+4st(2SAT)+2t(1SAT);Pcathayana Rehd.var.Wutai 2n=38=5M+22m+4sm+5st+2t(2SAT);Pcathayana Rehd.var.Gansulinxiaman 2n=38=2M+28m+1sm+7st(1SAT);Pcathayana Rehd.var.Qinghai 2n=38=1M+27m+3sm+6st(3SAT)+1t(1SAT);Pcathayana×Zhongqing 10 2n=38=1M+26m+4sm+5st(2SAT)+2t(2SAT);Pcathayana×Zhongqing 48 2n=38=16m+10sm(1SAT)+10st(2SAT)+2t(1SAT).The results showed definite karyotype differences among the species of Tacamhaca.The karyotypes of most species(varieties) are made of m and sm and a few with st and t chromosomes.The karyotypes of Tacamhaca were all of 2B type of Stebbins.This study provided important basic data for taxon of Populus.     

10种菊科花卉的染色体观察

作者对10种菊科花卉进行了染色体数目的观察,并对其中8种进行了核型分析。结果如下:翠菊(Callistephus chinensis Nees) 2n=18=18m (4SAT);麦秆菊(Helichrysum bracteatum Andr.)2n=24=18m+6sm;蛇目菊(Coreopsis tinctoria Nutt.) 2n=24=16m+8sm (2SAT);黑心菊(Rudbechia hirta L.) 2n=76;肿柄菊(Tithonia diversifolia A. Gray) 2n=34=24m(4SAT)+10sm (2SAT);大丽花(Dahlia pinnata Cav.) 2n=64;硫华菊(Cosmos sulphureus Cav.) 2n=24=2sm+22st;万寿菊(Tagetes erecta L.) 2n=24=6sm+16st(2SAT)+2t;天人菊(Gaillardia pulchella Foug.) 2n=34=22m+12sm;矢车菊(Centaurea cyanus L.) 2n=24=2sm+16st+6t(2SAT)。     

国产稗属植物的细胞学研究

对国产７种（含变种）稗属Ｅｃｈｉｎｏｃｈｌｏａ植物的细胞学进行了初步研究。９个供试材料的体细胞分别表现两种染色体数目２ｎ为３６或５４。除光头稗Ｅ．ｃｏｌｏｎｕｍＬ外,分析了其余种的核型,其结果为：稗Ｅ．ｃｒｕｓ．ｖａｒ．ｃｒｕｓｇａｌｌｉ２ｎ＝５４＝５８ｍ＋６ｓｍ;西来稗Ｅ．ｃｒｕｓ．ｖａｒ．ｚｅｌａｙｅｎｓｉｓ（Ｈ．Ｂ．Ｋ．）Ｈｉｔｃｈｃ ２ｎ＝５４＝４２ｍ（２ＳＡＴ）＋１２ｓｍ（４ＳＡＴ）;     

国产磨芋属的染色体核型报道(Ⅱ)

本文报道了磨芋属(Amorphophallus Blume)三个种(其中包括两个最近发现的新种)的染色体数目和核型,其核型公式分别是: 1.结节磨芋 K(2n)=2x=26=20m(2SAT)+6sm; 2.疣柄磨芋 K(2n)=2x=28=2M+16m+8sm+2st; 3.矮磨芋 K(2n)=2x=26=20m+4sm+2st; 本文还在报道磨芋(A.konjac)两个居群的核型的基础上,提出不同居群磨芋的核型存在一定异;并比较了矮磨芋和磨芋两个居群的核型,从核型上分析了它们之间可能的关系。     

八个四倍体鹅观草属物种的核型研究

对8个鹅观草属物种的核型进行了研究。核型公式如下:纤穗鹅观草2n=4x=28=20m+8sm(2sat);紫穗鹅观草2n=4x=28=22m(2sat)+6sm;假花鳞草2n=4x=28=24m(2sat)+4sm;肃草2n=4x=28=22m+6sm(2sat);小颖鹅观草2n=4x=28=22m+6sm(2sat);纤瘦鹅观草2n=4x=28=24m(4sat)+4sm;变颖鹅观草2n=4x=28=20m+8sm(2sat);毛花鹅观草2n=4x=28=24m(2sat)+4sm。它们的核型属1A或2A型。其中后5个物种的核型为首次报道。     

Studies on the Karyotype of 5 Samples of Allium Sect. Bromatorrhiza Ekberg

The karyotypes of 5 samples in Allium Sect. Bromatorrhiza Ekberg were analysed in this paper. In Allium wallichii Kunth, the first sample is a diploid, with genome formula is AA and karyotype formula is K(2n)=2x=14=2m(SAT)+2m+10sm. The second is an autotetraploid, with genome formula AAAA, karyotype formul K(2n)=4x=28=2m(SAT)+6m+20sm. These two karyotypes belong to “3A”. The two karyotypes of A. wallichii Kunth are similar in morphology, though different in ploidy. In Allium hookeri Thwaites, the first sample is a dibasic autoallotriploid. Its genome formula is AAB₁; the basic number of the genome A is 7 and that of the genome B₁ is 8. The karyotype formula is K(2n)=2x+x'=22=(12sm+2t)+(1m+4sm+1st+2t). The second is also an autoallotriploid. The genomes in pairs are similar to those in the first sample in size and morphology of chromosomes. However, the unpaired genome differs from the first one apparently. Therefore, its genome formula is AAB₂, and karyotype formula is K(2n)=2x+ x'=22=(12sm+2t)+(3m+1sm+2st+2t). The third is doubling of the first karyotype. It is an autoallohexaploid, with genome formula AAAAB₁ B₁ and karyotype formula K(2n)=4x+2x'= 44= (24sm+4t) + (2m+8sm+2st+4t). These three karyotypes belong to “3A”.     

蜘蛛抱蛋属的细胞分类学研究Ⅱ

文章报道了13种蜘蛛抱蛋属植物的染色体核型,并对属内核型进化规律作了总结。作者认为随体染色体和第1对染色体可以作为本属核型的特征染色体。染色体数目变异与花部式样密切相关。本属植物原始的染色体基数为x=19。此外,对非整倍性变异的主要机制也进行了讨论。     

醉鱼草属四个种的核型分析

报道了醉鱼草属（Btuldleja）4个种的染色体核型。云南醉鱼草（B.yunnanensis）的核型公式为2n=2x=38=22m＋16sm,皱叶醉鱼草（B．crispa）为2n=2x=38=26m＋10sm＋2st,密蒙花（B．officinalis）为2n=2x=38=20m＋16sm＋2st,口本醉鱼草（B．japonica）为2n=2x=38=20m＋16sm＋2st。日本醉鱼草的核型为2B型,其它3个种的核型为2A型。根据核型分析结果,结合形态学特征和已有的细胞学资料,初步讨论了醉鱼草组（Sect．Neemda）两个系（Series）可能的演化关系。