11个四倍体赖草属物种的核型研究

对11个四倍体赖草属Leymus Hochst.物种的核型进行了研究,核型公式如下：沙生赖草L. arenarius (L.) Hochst., 2n=4x=28=18m+4sm+6st (4sat); 密穗赖草L. condensatus (J. Presl) A. Lve, 2n=4x=28=22m+4sm (2sat)+2st (2sat); 新生赖草L. innovatus (Beal) Pilg., 2n=4x=28=24m (4sat) +4sm (2sat);多枝赖草L. multicau     

东北地区小麦族11种植物的核型报道

本文对中国东北地区小麦族11种植物的核型进行了研究。 结果如下：冰草2n=4x=28=20m +8sm;偃麦草2n=6x=42=34m(2SAT)+8sm;短芒大麦草2n=4x=28=20m+8sm(4SAT);吉林 鹅观草2n=4x=28=20m+8sm(4SAT);大芒鹅观草2n=4x=28=20m(2SAT)+8sm(2SAT);老芒 麦2n=4x=28=20m+8sm(4SAT); 披碱草2n=6x=42=32m+10sm(6SAT); 肥披碱草 2n=6x=42=32m+10sm(6SAT);羊草2n=4x=28=20m(4SAT)+8sm;纤毛鹅观草2n=4x=28= 22m(2SAT)+6sm(2SAT);鹅观草2n=6x=42=30m+12sm(4SAT);其中前5种的核型为首次报道。     

仲彬草属和鹅观草属几个种的核型研究

本文报道了仲彬草属2个种和鹅观草属3个种的核型,其核型均为首次报道。结果如下： Roegneria nutans,2n=4x=28=26m+2sm;R．abolinii,2n=4x=28=24m+4sm．R．aristiglumis, 2n=6x=42=32m+1Osm(2sat);Kengyilia tahelacana,2n=6x=42=36m(2sat)+6sm(2sat);K． zhoasuensis,2n=6x=42=34m(4sat)+8sm．根据核型特征,K．tahelacana和K．zhoasuensis两个六位体种归入K.engyilia属是正确的。     

鹅观草属4个种核型与进化的研究

报道了鹅观草属(Roegneria C. Koch)4个种的核型,即中华鹅观草,核型为2n=4x=28=28m(2SAT);裸穗鹅观草,核型为2n=4x=28=24m+4sm(2SAT);缘毛鹅观草,核型为2n=4x=28=22m+6sm(2SAT);缘穗鹅观草,核型为2n=4x=28=24m(2SAT)+4sm。4个种核型的共征和自征反映了形态划分中共属分种的合理性。尤其通过核型不对称性和相对进化程度的分析,表明中华鹅观草最原始,缘穗鹅观草最进化,裸穗鹅观草和缘毛鹅观草演化居中;狭颖草系高级于缘毛草系。核型不对称性所表示的进化程度似乎与系间颖芒的发生,种间花序的增长变粗、外稃芒的延伸相关。     

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。     

拟鹅观草属6种2亚种和鹅观草属3种植物的核型研究

对拟鹅观草属Pseudoroegneria 6种2亚种和鹅观草属Roegneria 3种植物的核型进行了研究,核型公式如下：P. spicata (Pursh) A. Lve,2n=2x=14=12m (2sat)+2sm; P. strigosa ssp. aegilopoides (Drobov) A. Lve,2n=2x=14=12m (2sat)+2sm; P. libanotica (Hackel) A. Lve,2n=2x=14=10m+4sm (4sat); P. stipifolia     

拟鹅观草属3种植物的核型研究

对禾本科小麦族拟鹅观草属物种Pseudoroegneria geniculata、P.geniculata ssp.scythica和P.geniculata ssp.pruinifera的核型进行了研究.结果显示:P.geniculata和P.geniculata ssp.scythica为四倍体物种,P.geniculata ssp.pruinifera为六倍体物种;P.geniculata、P.geniculata ssp.scythica和P.geniculata ssp.pruinifera的核型公式分别为2n=4x=28=18m(2sat)+10sm(2sat)、2n=4x=28=28m(2sat)和2n=6x=42=36m(6sat)+6sm(2sat);P.geniculata和P.geniculata ssp.pruinifera为2A核型,而P.geniculata ssp.scythica为1A核型.研究表明:3种植物的核型存在差异;P.geniculata ssp.pruinifera的核型为首次报道,其核型明显不同于P.geniculata和P.geniculata ssp.scythica.     

10个四倍体披碱草属物种的核型（简报）

本文报道了来自北美和亚洲10个四倍体披碱草属物种Elymus(StStHH)的核型.其核型属于1A或2A型,核型公式如下:24m+4sm(2sat)(加拿大披碱草E. canadensis);20m+8sm(4sat)(E. elymoides);20m+8sm(4sat)(E. glaucus);22m+6sm(4sat)(E.lanceolatus);22m+6sm(2sat)(E. mutabilis);22m+6sm(2sat)(老芒麦.E.sibiricus);24m+4sm(E.trachycaulus);22m+4sm+2st(2sat)(E.trachycaulus ssp.subsecundus);24m+4sm(4sat)(E.virginicus);20m+8sm(4sat)(E.wawawaiensis).     

我国11种披碱草的核型研究

本文报道了中国产的11种披碱草属植物的核型,其中9种为首次报道。结果如下:老芒麦2n=4x=28=24m+4sm(2SAT);披碱草2n=6x=42=36m(2SAT)+6sm(4SAT);青紫披碱草2n=6x=42=32m+10sm(4SAT);垂穗披碱草2n=6x=42=34m+8sm(2SAT);圆柱披碱草2n=6x=42=32m+10sm(2SAT);短芒披碱草2n=6x=42=30m+12sm(4SAT);黑紫披碱草2n=6x=42=36m(6SAT)_1+6sm;毛披碱草2n=6x=42=30m+12sm(6SAT);紫芒披碱草2n=6x=42=22m=12sm(2SAT)+8st(4SAT);肥披碱草2n=6x=42=34m(2SAT)+6sm(4SAT)+2st;麦(?)草2n=6x=42=30m(4SAT)+12sm(2SAT)。     

当归属及近缘小属的核型演化及地理分布研究

本文报道了当归属Angelica及3个近缘小属12种植物的核型,其中10种为首次报道。带岭当归A．dailingensis 2n＝22＝20m+2sm(SAT);丽江当属A．likiangensis 2n＝22＝18m+4sm; 青海当归A．nitida 2n＝22＝14m+4sm+4sm(SAT);林当归A．silvestris 2n＝22＝16m+4sm(SAT)+2st(SAT);紫花前胡A．decursiva 2n=22＝16m+4sm+2sm(SAT);秦岭当归A．tsinlingensis 2n＝22＝18m+4sm; 阿坝当归A．apaensis 2n＝22＝14m+6sm+2st(SAT);隆萼当归A．oncosepala2n＝4x＝44＝28m+12sm+4st,三小叶当归A．ternata 2n=22＝10m+8sm(SAT)+4st(SAT);柳叶芹Czernaevialaevigata 2n=22＝14m+6sm+2sm(SAT);短茎古当归Archangelica brevicaulis 2n＝22＝8m+2m(SAT)+4sm+4sm(SAT)+4st;高山芹Coelopleurum saxatile 2n＝28＝12m+6sm+10st。除带岭当归核型为1A型和高山芹为2B型外,其余种类均为2A型。根据染色体长度比和平均臂比绘制了本次和我们过去已报道的当归属及近缘属23种植物的核型散点图。据核型类型和近端着丝点的有无,把当归属20个种的核型分3组。并结合外部形态、花粉类型和地理分布,探讨了各近缘属的系统演化关系。     

鹅观草属五个类群的核型与进化

报道了鹅观草属５个类群的核型,即长芒鹅观草,核型２ｎ＝４ｘ＝２８＝２２ｍ＋６ｓｍ（２ＳＡＴ）;短颖鹅观草,核型２ｎ＝４ｘ＝２８＝２０ｍ（２ＳＡＴ）＋８ｓｍ（２ＳＡＴ）;短柄鹅观草,核型２ｎ＝４ｘ＝２８＝２２ｍ（２ＳＡＴ）＋６ｓｍ;纤毛鹅观草,核型２ｎ＝４ｘ＝２８＝２０ｍ＋８ｓｍ（４ＳＡＴ）;毛盘鹅观草,核型２ｎ＝４ｘ＝２８＝１８ｍ＋６ｓｍ（４ＳＡＴ）＋４ｓｔ。同时,通过核型重要性状的递变分析,揭示了鹅观草属５个类群的相对进化程度以及宏观分类中４个组的系统发育关系,表明鹅观草属的半颖组在系统发育中可能既派生了颖体短小的小颖组,又派生了颖体长大的大颖组和长颖组。     

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.     

鹅观草属4个种的核型与进化

报道了4个种鹅观草属（Roegneria C. Koch）植物的核型,其核型公式如下：芒颖鹅观草(R. aristiglumis Keng et S. L. Chen), 2n=4x=28=22m+6sm（2SAT）;短颖鹅观草(R. breviglumis Keng), 2n=4x=28=20m（2SAT）+8sm;红原鹅观草(R. hongyuanensis L. B. Cai), 2n=4x=28=22m+6sm（2SAT）;山东鹅观草(R. shandongensis（B. Salomon）J. L. Yang, Y. H. Zhou et Yen), 2n=4x=28=24m（2SAT）+4sm。同时对染色体主要特征的演变规律进行了分析,揭示了鹅观草属4个种的相对进化程度以及宏观分类中2个组的系统发育关系,表明鹅观草属的半颖组在系统发育中派生了颖体短小的小颖组。     

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.     

国产十五种翠雀族植物的核型研究

本文报道了国产乌头属Aconitum L.12种和翠雀属Delphinium L．3种植物的染色体数目和核型。花葶乌头A．scaposum var．scaposum和聚叶花葶乌头A．scaposum var．vaginatum的核型公式为2n=2m+6sm+8st;两色乌头A．alboviolaceum为2n＝16＝2m+6sm(2sat)十8st;高乌头A．sinomontanum var．sinomontanum为2n＝16＝4m+4sm+8st,而狭盔高乌头A．sinomontanum var．angustius为2n＝32＝6m+6sm+20st(1sat);褐紫乌头A.brunneum为2n＝16＝2m(1sat)+14sm 松潘乌头A．sungpanense为2n＝16＝6m(2sat)+10sm(2sat);弯枝乌头A．arcuatum为2n=16=4m+12sm;乌头A．carmichaeli为2n=32＝10m+22sm;北乌头A．kusnezoffii为2n＝32＝10m十22sm;鸭绿乌头A.jaluense为2n＝32=10m+22st;伏毛铁棒锤A．flavum为2n＝16＝2m+14sm; 铁棒锤A．pendulum为2n=16=4m+12sm;缩梗乌头A．sessiliflorum为2n＝16＝2m+10sm+4st;展毛翠雀花D．kamaoense var．glabrescens 为2n=16＝2m+6sm+8st;蓝翠雀花D．caeruleum为2n=16=2m+6sm+8st;多枝翠雀花D．maximowiczii为2n=16=2m+6sm+8st。其中花葶乌头、狭盔高乌头、褐紫乌头、松潘乌头、鸭绿乌头、伏毛铁棒锤、缩梗乌头、展毛翠雀花、蓝翠雀花、多枝翠雀花的染色体数目和核型为首次报道。     

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。     

Karyotype Analysis of Hippophae L. in China

The present paper reports karyotypes in 4 species and 5 subspecies of Hippophae L. in China. It is found that all of the species and subspecies are diploid, with 2n=24, their complements are made of m and sm chromosomes and of them only H. thibetana has a pair of satellites. All of these karyotypes are symmetrical and primitive. It can be simplied as follows: Hippophae neurocarpa 2n = 2x = 24 = 18m+6sm, H. thibetana 2n = 2x = 24 = 14m (2sat)+ 8sm, H. rhamnoides L. ssp. gyantsensis 2n=2x=24= 18m+ 6sm, H. salicifolia 2n = 2x = 24 = 10m + 14sm, H. rhamnoides L. ssp. sinensis 2n=2x= 24 = 18m + 6sm, H. rhamnoides L. ssp. turkestanica 2n = 2x = 24 = 20m + 4sm; Hi. rhamnoides L. ssp. yunnanensis 2n = 2x = 24 = 14 + 10sm, H. rhamnoides L. ssp. mongolica 2n = 2x = 24 = 16m + 8sm.