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我国某些蔷薇属花卉的核型研究 总被引:9,自引:0,他引:9
本文报道了我国产的5种和14个品种的蔷薇属花卉的染色体数目和核型,结果如下:小花型为二倍体,2n=2x=14,少数为混倍体;中花型为三倍体,2n=3x=21;大花型为四倍体,2n=4x=28。大部分种的核型均由其中部和近中部着丝点染色体组成,少数种具近端着丝点染色体。它们可以区分为3种核型类型,即1A、2A和1B。 相似文献
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国产7种乌头属植物的核型研究 总被引:7,自引:0,他引:7
本文报道了国产7种乌头属植物(两色乌头(Aconitum alboviolaceum Kom.,牛扁 A.barbartum var.puberulum Ledeb.,蔓乌头A.volubile Pall.,展毛蔓乌头 A.ciliare DC.,北乌头 A.kusnezoffii Reichb.,蒿叶乌头 A.artemisiaefolium Bar.et Skv.,细叶乌头 A.macrorhgnchum Turcz.)的核型。其中展毛蔓乌头、蒿叶乌头和细叶乌头的核型为首次报道。本文还首次指出乌头属中具多年生根状茎的牛扁亚属植物的核型没有明显的二型性,而具二年生块根的乌头正属植物的核型的二型性十分明显。此外还讨论了细叶乌头及展毛蔓乌头的系统位置,认为它们与蔓乌头有较近的亲缘关系。 相似文献
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披碱草属6种植物的核型研究 总被引:6,自引:0,他引:6
本文首次报道特产于我国青藏高原披碱草属Elymus的6种植物的染色体数目和核型。6个种的染色体数目为2n=42,都是6倍体。它们的核型是:黑药鹅观草,2n=6x=42=32m+10sm;糙毛鹅观草,2n=6x=42=34m+8sm;大颖鹅观草,2n=6x=42=30m+12sm;疏花鹅观,2n=6x=42=32m+10sm;青海鹅观草,2n=6x= 42=34m十8sm;长颖鹅观草,2n=6x=42=34m十8sm。它们的核型属1B或2B型,染色体中均未发现随体。 相似文献
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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。 相似文献
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中国苹果属植物核型研究 总被引:5,自引:0,他引:5
.蒲富慎;.林盛华;.李秀兰;.宋文芹;.陈瑞阳 《武汉植物学研究》1985,3(4):451-456
本文对11种苹果属植物染色体核型进行了研究。结果表明:在山荆子系中,山荆子(Malus baccata)、毛山荆子(M. mandshurica)较原始;在苹果系中,新疆野苹果(M. sieversii)较苹果(M. pumila)为原始。 相似文献
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仙茅属三个国产种的核型研究 总被引:1,自引:0,他引:1
本文报道了中国产三种仙茅植物的核型。1.绒叶仙茅Curculigo crassifolia (Baker) Hook. f., 2n=2x=18=10m(4SAT) 8 sm;2.大叶仙茅C.capitulata(Lour.)O. Kuntze,2n=2x=18=10(2SAT) 8sm;3.中华仙茅C.sinensis S.C.Chen,2n=2x=18=8m(3SAT) 10sm(2SAT)。其中中华仙茅的核型为首次报道。虽然三种仙茅的核型都是“2B”型,但中华仙茅的核型不对称性比绒叶仙茅和大叶仙茅强。 相似文献
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本文介绍了蛾螺科三种螺的核型。水泡蛾螺(Buccinum pcmphigum)为2n=30,染色体的形态分类组成为16m+10sm+4st,NF=56;Plicifusus scissuratus为2n=34,染色体的形态分类组成为20m+10sm+4st,NF=64;香螺(Neptumea cumingi)为2n=60,染色体的形态分类组成为30m+22sm+8st,NF=112。 蛾螺科核型分析,显示贝类染色体数目及其形态与贝类进化有关。 相似文献
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Light microscopical observation of thin sections revealed that the initials of secretory cavities in Poncirus trifoliata (L.) Raf. originated from parenchyma cells below the epidermis in early stages of development. The cavity lumen appeared in the center of the initials and gradually enlarged during subsequent development. Concurrently the ceils surrounding the central space differentiated into secretory cells and sheath cells. The developed cavities of fruit ,stem and leaf consisted of 2–5 layers of sheath cells and 2–3 layers of secretory cells surrounding a spherical space. The secretory cells lining the space were observed to remain intact throughout the plantt s life. On the basis of comparative studies with the aid of different kinds of fixatives, embedding media and sectionings,it was suggested that the ,manner of formation of the lacunao of secretory cavities in fruit peels of P. trifoliata, Citrus reticulata and C. sinensis were different. However,as seen in thin sections the secretory cavities of all the 3 species developed schizogenously. Our result with reference to views of other authers concluded the existance of a common schizogenous cavity formation in Rutaceae. 相似文献
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部分柑桔属及其近缘属Giemsa C-带带型研究 总被引:6,自引:0,他引:6
本文应用Giemsa显带技术研究了枳属(Poncirus)、金柑属(Fortunella)和柑桔属(Citrus)16个分类群的染色体。枳属以末端带和着丝点带为主,金柑属与柑桔属主要以末端带为主;统计分析了各分类群每对染色体及全组染色体的异染色质含量,并列出其带型公式;探讨了金柑属的分类学地位;赞同把柚(C.grandis)作为柑桔属的基本种之一;根据异染色质含量的变化对柑桔属的带型演化进行了讨论。 相似文献
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A genetic map of citrus based on the segregation of isozymes and RFLPs in an intergeneric cross 总被引:4,自引:0,他引:4
D. C. Jarrell M. L. Roose S. N. Traugh R. S. Kupper 《TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik》1992,84(1-2):49-56
Summary Isozymes and restriction fragment length polymorphisms were used as markers in the construction of a genetic map of the citrus nuclear genome. The map was based on the segregation of 8 isozyme, 1 protein, and 37 RFLP loci in 60 progeny of a cross of two intergeneric hybrids, Sacaton citrumelo (Citrus paradisi Macf. x Poncirus trifoliata (L.) Raf.) and Troyer citrange (C. sinensis (L.) Osbeck x P. trifoliata), often used as rootstocks. The map contains 38 of 46 studied loci distributed on ten linkage groups. A genome size of 1,700 cM was estimated from partial linkage data. Approximately 35% of the genome should be within 10 cM and 58% within 20 cM of the mapped markers. Eight loci in three linkage groups and 1 unlinked locus deviated significantly from Mendelian segregation. 相似文献
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以枳壳为对象 ,进行了农杆菌介导的上胚轴转化系统建立研究 ,得到了携带柑桔衰退病病毒外壳蛋白基因的枳壳转化植株。研究表明 :枳壳各类外植体中 ,上胚轴是较好的转化材料 ;上胚轴出芽部位主要在形态学上端。以卡那霉素为选择剂 ,外植体水平面放置时 ,选择剂的剂量是 50~ 70mg/ L。转化研究中发现感染液中乙酰丁香酮 10 0μmol/ L的加入促进转化外植体 Gus表达阳性率的提高。延迟 1a的选择培养 ,有助于 Gus阳性芽的增多。所得 Gus阳性无性系经 Southern blot杂交检测 ,证明外源基因已稳定整合到了植物基因组中 ,所得 Gus阳性植株确为携带柑桔衰退病病毒外壳蛋白基因的转化植株 相似文献
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Fifty nine taxa of Citrus, Fortunella and Poncirus were studied byhierarchical agglomerative clustering analysis and quantas type 3 analysis using 86morphological characters. Five affinity groups were obtained in Citrus. The firstgroup includes C. medica, C. limon, C. limonia, C. aurantifolia and C. iambhiri; the second includes C. grandis, C. aurantium, C. sinensis and C. paradisi; the third is mandarin (C. reticulata); the forth is C. ichangensis; The last is C.hongheensis. Mandarin oranges show two subgroups: one comprise satsuma,King, Shagan, Tankan and Bendiguangju, and the other consists of the remainingtypical mandrins. The two papeda oranges, honghe papeda and ichang papeda,could not be clustered into the same group, indicating that they might haveevolved from two compeletly different ancestors. Pumelos(C. grandis) show somerelationships to honghe papeda orange. C. limonia is assumed to be a hybrid between rough lemon and mandarin. The sweet orange(C. sinensis) is considered tobe the offspring of pomelo and mandarin. Zhekiang jinju a small mandarin generally considered similar to calamondin in China, should be a true mandarin orangebased on our results. Poncirus was well distinguished from the other two genera,Citrus and Fortunella, by the numerical methods used in this study. Our resultsshow that citron (C. medica), mandarin (C. reticulata) and pumelo (C. grandis)are the original species of the subgenus Citrus, which was congruent with the re-sults obtained by Barrett and Soost (1976), Potvin (1983) and Handa (1985). 相似文献
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石灰性土壤上富含碳酸钙是导致柑桔缺铁黄化的主要因素。碳酸钙胁迫对枳壳愈伤组织生理影响的研究结果表明除全Fe含量外,CaCO3浓度与POD活性、SOD活性、CAT活性、活性Fe含量、可溶性蛋白质含量、愈伤组织增殖均呈显著或极显著负相关,与培养液pH值呈显著相关,随着培养天数的增加,POD活性、活性Fe含量、可溶性蛋白质含量、愈伤组织增殖呈降低趋势,SOD、CAT活性先升后降,全Fe含量在25日出现沉积,高浓度CaCO3下培养液pH值仅在20日左右略有降低。 相似文献
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富民枳的分类地位及其在进化中的作用研究——叶片同工酶证据 总被引:3,自引:0,他引:3
富民枳(Poncirus polyandra S.Q.Ding et al.)是分布于云南省富民县的一个新枳属类型。在形态上,它不同于普通枳(P.trifoliata Raf.)。富民枳为常绿类型,子房10室,花瓣5—9,花丝35—43,一年开花2—3次。通过对富民枳、普通枳、金柑属及柑桔属的叶片谷氨酸草酰乙酸转氨酶(GOT)、6-磷酸葡萄糖变位酶(PGM)、6-磷酸葡萄糖异构酶(PGI)、过氧化物酶(PX)、苹果酸酶(ME)、超氧化物歧化酶(SOD)以及四唑氧化酶(TO)同工酶的比较后发现,富民枳独具Sod-1-M基因,具有稀有的To-2-R基因,在To-1及Got-3位点上,存在无效基因,这些结果表明,富民枳能够以种的地位存在于枳属中。在进化过程中,富民枳可能是联结枳属与柑桔属的“桥梁”。 相似文献