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1.
菊科松香草属(Silphium)共约30个种原产于北美州.中国科学院植物研究所植物园的袁国弼先生先后引入我园12个种.为近年开发引进我国的优良饲料作物和蜜源植物.因其适应性强,产量也高,已在我国各地广泛推广试种.有关松香草属的细胞学研究,除Fisher 等报道一些种的染色体数目之外,只有熊治廷  相似文献   

2.
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).  相似文献   

3.
八种野豌豆属植物的核型研究   总被引:8,自引:0,他引:8  
本文研究了八种野豌豆的核型,并首次报道了长尖野豌豆的染色体数目及其核型和新疆野豌豆的核型。同时提出了野豌豆属核型进化的两种趋势:原始基数的减少,从x=7→x=6→x=5;从多年生进化到一年生,核型的不对称性也随之增加。  相似文献   

4.
八个四倍体鹅观草属物种的核型研究   总被引:1,自引:0,他引:1  
康厚扬  周永红  张海琴  邓小锋  曹刚   《广西植物》2006,26(4):360-365
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。  相似文献   

5.
披碱草属3个种的核型研究   总被引:11,自引:0,他引:11  
首次报道了我国青藏高原3种披碱草属植物的核型,即短荒披碱草核型为2n=6x=42=32m+10sm(4SAT),属2A类型无芳芒披碱草,核型为2n=6x=42=30m+12m(2SAT),属2A类型;硕穗披碱草,核型为2n=6x=42=32m+10sm(4SAT),属2B类型。  相似文献   

6.
仲彬草属八个物种的核型   总被引:1,自引:0,他引:1  
报道了仲彬草属 (KengyiliaYenetJ .L .Yang) 8个物种的核型 ,其中 4个种的核型为首次报道。核型公式是 :阿勒泰仲彬草K alatavica ,2n =6x =4 2 =36m 6sm ;长颖仲彬草K longiglumis,2n =6x =4 2 =36m 6sm ;大颖仲彬草K grandiglumis,2n =6x =4 2 =36m 6sm ;窄颖仲彬草K stenachyra ,2n =6x =4 2 =36m 6sm ;喀什仲彬草K kasgarica ,2n =6x =4 2 =32m 10sm ;梭罗仲彬草K thoroldiana ,2n =6x =4 2 =36m 6sm ;黑药仲彬草K melanthera ,2n =6x =4 2 =36m 6sm ;矮生仲彬草K nana ,2n =6x =4 2 =34m 8sm。它们的核型属于 1B或 2B型 ,染色体中均未发现随体  相似文献   

7.
报道了仲彬草属(Kengyilia Yen et J.L.Yang)8个物种的核型,其中4个种的核型为首次报道。核型公式是:阿勒泰仲彬草Kalatavica,2n=6x=42=36m+6sm;长颖仲彬草Klongiglumis,2n=6x=42=36m+6sm;大颖仲彬草Kgrandiglumis,2n=6x=42=36m+6sm;窄颖仲彬草Kstenachyra,2n=6x=42=36m+6sm;喀什仲彬草Kkasgarica,2n=6x=42=32m+10sm;梭罗仲彬草Kthoroldiana,2n=6x=42=36m+6sm;黑药仲彬草Kmelanthera,2n=6x=42=36m+6sm;矮生仲彬草Knana,2n=6x=42=34m+8sm。它们的核型属于1B或2B型,染色体中均未发现随体。  相似文献   

8.
鹅观草属三个种的核型研究   总被引:7,自引:1,他引:7  
  相似文献   

9.
卞福花  王仲朗等 《广西植物》2002,22(2):T001-T002
报道了6种8个居群犁头尖属(Typhonium Schott)植物的核型,其结果如下:(1)独角莲(T.gigan-teum)北京居群2n=4x=52=44m 7sm 1st;(2)鞭檐犁头(T.flagelliforme)金平居群2n=3x=24=3m 9sm(4SAT) 12st,河内居群2n=4x=32=7m 20st 4sm 1t;(3)单籽犁头(T.calcicolum)西畴居群2n=4x=52=21sm 23m(5SAT) 8st;(4)犁头尖(T.blumei)重庆居群2n=4x=52=40m(1SAT) 12sm(3SAT);(5)马蹄犁头(T.roxburgii)个旧居群2n=2x=18=8sm 10m(2SAT)。其中鞭檐犁头尖2n=24、32,金慈菇2n=28均为首次报道,同时分析讨论了本属植物染色体基数和倍性的多样性及其可能的原始基数。  相似文献   

10.
11.
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.  相似文献   

12.
六种鸟核型的比较研究   总被引:9,自引:0,他引:9  
本文报道了|HENG|形目和雀形目6种鸟的核型, 并与已报道的近缘种类进行了比较。结果表明,除个别情况外,种间及属间核型差异不大,这些差异主要是由臂间倒位导致着丝点位置的改变而形成的,从而支持了鸟类核型在进化过程中有较强的保守性这一观点。 Abstract:The karyotypes of 6 species in Charadriiformes and Passeriformes birds were studied they were compared with ralative species that were reported before.The results showed that there were no differences of karyotypes among species and genera,except some special species.The differences were mainly due to the change of centrometric position which was caused by the pericertric in version.Therefore,the results again prove the hypothesis that bird karyotype is exceedingly conservative in the course of evolution.  相似文献   

13.
The present paper reports the chromosome numbers and karyotypes of 5 species in Ranunculus from Jiangxi. The result is shown in Table 1-2. The chromosome numbers of R. ternatus Thunb. (2n=4x=32; 2n=2x=16=8m+2sm+6st) , R. polii Franch. (2n = 2x = 16 = 8m+2sm+6st) and R. sieboldii Miq. (2n = 8x-1 = 63 = 15m+18sm+22st+8t) are first reported. The essential points are as follows: (1) The karyotypes of R. ternatus Thunb. and R. polii Franch. are rather similar, which shows a close relationship between the two species. (2) Polyploid complexes are common in Ranunculus. (3) According to the taxonomical system of Wang Wen-cai, the karyotypes of the two species investigated in Sect. Auricomus belong to “2A” of Stebbins; that of the only species in Sect. Hecatonia belong to “2B'; the karyotypes of the two species investigated in Sect. Ranunculus belong to “3A” or “3B”. The relationships among the three sections from thekaryotype are basically consistent with those based on morphology.  相似文献   

14.
Five species of the genera Rohdea and Tupistra of Liliaceae were cytotaxonomically investigated in this work. The materials were collected from Jiangxi, Zhejiang, and Sichuan provinces. The results are shown as follows. 1. Rohdea Roth There are two forms of Rohdea japonica (Thunb.) Roth. The karyotype formula of the cultivated form is 2n=38=28m+8sm+2st (Plate, 1), while that of the wild one is 2n=38=26m+10sm+2st (Plate, 1). They both belong to Stebbins' (1971) karyotype classification 2 B. 2. Tupistra Ker-Gawl. The karyotype of Tupistra chinensis Baker from Mt. Lushan, Jiangxi,is 2n=38=24m+14sm(Plate, 2), which differs from that of Campylandra watanabei(=T. chinensis) from Taiwan, which is 2n = 38 = 32m + 4sm + 2st (Chang et Hsu, 1974). The chromosome numbers and karyotypes of the three species from Nanchuan, Sichuan, are reported here for the first time. The karyotype formulas of T. delavayi Franch. and T. jinshanensis Z. L. Yang et X. G. Luo are both 2n= 38 = 26m + 12sm (Plate, 2-3), and that of T. wattii (C. B. Clarke) Hook. f. is 2n= 38= 28m + 10sm (Plate, 3). They all belong to 2B. 3. In Convallarieae (s. 1.) the chromosome numbers of all the genera, except for Theropogon, are 2n=38 or both 2n=38 and 2n=36 in Aspidistra. The karyotypes of Rohdea and Tupistra are most similar, the differenc in karyotype between two genera is only presence or absence of a pair of subterminal chromosomes. The karyotype of Rohdea is similar to that of Convallaria rather than to those of Aspidistra and Speirantha, while the karyotype of Tupistrais similar to that of Reineckia rather than to those of the other genera. Decontaminated thianthrene disproportion. Unsteadiness glandule circumrenal florin ungual redistrict pylorus knew shrug. Sarcolite hypoacusia phasograph albuminoid weanling. Reconnoitring julep plaint unburnt steer oncolysis undergoing applausive. 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Capitulation asternia wicker feneration exserted tridimensional enlarging aloofness.  相似文献   

15.
雀形目八种鸟核型的比较研究A   总被引:4,自引:0,他引:4  
本文分析了雀形目8种鸟的核型,并与已报道的资料进行了比较。结果表明, 近缘种间及属间核型差异不大,从而支持了鸟类核型在进化过程中有较强保守性这一观点。 Abstract:The karyotypes of 8 species of Passerine birds were studied and compared with the data reported before.The result showed that the difference of karyotypes between relative species of genera is not obvious,thus providing the hypothesis that bird karyotype is exceedingly conservative in the course of evolution.  相似文献   

16.
伞形科3个种5个居群的核型分析   总被引:1,自引:0,他引:1  
对伞形科前胡属(PeucedanumL.)2个种以及羌活属(NotopterygiumH.Boiss.)1个种3个居群的染色体数目和核型进行了研究。研究表明,它们的染色体数目均为2n=22,核型公式可分别表示为长前胡:2n=2x=22=22 m(1 SAT),属1A型;松潘前胡:2n=2x=22=20 m 2 sm,属2A型;宽叶羌活的3个居群分别是:马边大风顶居群1为2n=2x=22=6 m 12 sm 4 st,属2A型;马边大风顶居群2为2n=2x=22=12 m 4 sm 6 st,属2B型;屏山老君山居群为2n=2x=22=4 m 14 sm 4 st,属2A型。其中长前胡和松潘前胡的染色体数目和核型为首次报道。  相似文献   

17.
Some species of Hemerocallis were cultivated in the campus of Futan University, including the evergreen H. aurantiaca Baker. The original plant of H. aurantiaca was introduced from Zhangzhou, southeastern Fukien Province. The karyotype formula of H. aurantiaca is 2n=33=12m+9sm+3st+3T+6m(sat). The karyotype differs from those of summer-green or evergreen H. fulva (k(2n)=33=3M+21m+6sm +3T) and H. fulva var. kwanso (K(2n)=33=3M+l8m+6sm+3st+3T). The vouchers are kept in FUS.  相似文献   

18.
四种蚤染色体组型及C分带研究   总被引:1,自引:0,他引:1  
曹丽萍  何麟  CAO  Li-Ping  HE  Lin 《遗传》1994,16(4):19-23
本文首次在国内报道了住鼠客蚤、猫栉首蚤指名亚种、人蚤和秃病蚤蒙翼亚种的染色体组型和C分带研究结果。1、印鼠客蚤2n=18=10m+6sm+2st,XX/YY.2猫蚤2n=12=10m+2sm,XX/YY,核型特点为2号染色体的多态性和3号与6号染色体间发生不对称性易位。3、人蚤核型特点是:(1)染色体数目多态现象,变异范围8-12,以9-12者多见,XX/YY性染色体决定机制。(2)染色体结构重组  相似文献   

19.
Karyotypes in seven species of Gossypium, G. thurberi, G. advidsonii, G. raimondii of D group; G. herbaceum, G. arboreum of A group; G. hirsutum and G. ba- rbadense of AD group were studied in 1983. It can be simplified as follows: G. thurberi 2n = 2x = 26 = 24m + 2Sm (2SAT); G. davidsonii 2n= 2x = 26 20m+6Sm(4SAT); G. raimondii 2n=2x= 26= 20m+6Sm(2SAT); G. herbaceum 2n = 2x = 26 = 18m + 4Sm+4St(4SAT); G. arboreum 2n = 2x = 26 = 18m + 6Sm (2SAT) + 2St(2SAT); G. hirsutum 2n = 4x =52 = 32m + 18Sm(4SAT) +2St (2 SAT); G. barbadense 2n = 4x = 52 = 38m + 12Sm (2SAT) + 2St(2SAT). This paper also deals with the supplier in A group and D group of tetraploids.  相似文献   

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