共查询到18条相似文献,搜索用时 140 毫秒
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昆嵛山萱草属植物细胞学研究及其应用分析 总被引:1,自引:0,他引:1
研究了两种来自昆嵛山萱草属(H.emerocallis)植物的染色体数目、核型,结果表明:黄花菜(H.citrina)的体细胞中期染色体核型:2n=2X=22=16m+4sm+2T,核型不对称系数为58.9%,染色体相对长度组成:2n=2X=22=6L+10M1+6S,染色体总体积为105.39μm3;北萱草(H.esculenta)体细胞中期染色体核型:2n=2X=22=20m+2T,核型不对称系数为53.8%,染色体相对长度组成:2n=2X=22=4L+2M2+14M1+2S,染色体总体积为99.43μm3。同时对染色体的性状进行了巢式方差分析,表明居群内个体间、细胞间染色体的形态和大小具有一定程度的变异,且居群内的变异主要来自于个体间;最后分析了该属植物的应用前景。 相似文献
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奥勒岗黑麦草及其三个选系的染色体核型分析 总被引:1,自引:0,他引:1
供试的奥勒岗黑麦草及4号、6号、8号选系的体细胞染色体数均为2n=4x=28,是四倍体,其染色体核型形式相同,为2n=4x=26m+2sm(2SAT),属基本对称式,它们的染色体相对长度及臂比总值变动不大。同时,对多花黑麦草早期引进的一个品种也进行了核型分析,结果是:其体细胞染色体数为2n=2x=14,是二倍体,染色体核型形式为2n=2x=12m+2sm(2SAT)。 相似文献
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翠芦莉与大花芦莉染色体核型分析 总被引:1,自引:0,他引:1
对爵床科芦莉草属2种植物翠芦莉(Ruellia brittoniana leonard)和大花芦莉(Ruellia elegans Poir.)的染色体数目与核型进行了分析.结果表明,翠芦莉与大花芦莉的体细胞染色体数目均为2n=36,为二倍体;翠芦莉和大花芦莉的核型公式分别为2n=2x=26m+8sm+2T和2n=2x=28m+6sm+2T,核型均属于2B型. 相似文献
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试验对攀援天门冬体细胞染色体进行了核型分析,结果表明,其染色体数目为2n=20,核型公式为k(2n)=20=-2M+14m+4sm,核型为"IB"型. 相似文献
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《西南农业学报》2015,(6)
对甘蔗属热带种(Saccharum officinarum)越南牛蔗和滇蔗茅(Erianthus rockii Keng)云南95-20杂交后代BC_12个无性系(云南06-278和云南06-279)的根尖进行染色体制片,用以鉴定其体细胞染色体数目和核型分析。结果表明,这2个BC_1后代的体细胞染色体数目均为2n=110,云南06-278和云南06-279核型公式分别为2n=110=116m+4sm和2n=110=102m+8sm,核型分别为2B和2C类型。根据BC_1后代染色体数目鉴定结果,推断杂交F1子代与甘蔗商业品种新台糖10号(ROC10)杂交时,染色体以2n+n方式遗传到BC_1后代。 相似文献
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《福建农林大学学报(自然科学版)》2020,(1)
采用常规压片方法,对5种国外引进的水仙体细胞染色体数目和核型进行了分析.结果表明:5种水仙材料中有二倍体1种,三倍体和四倍体各2种,核型公式分别为2n=4x=28=8m+16sm+4st(‘苏娅’)、2n=3x=30=7m+17sm+5st+1t(‘小燕子’)、2n=3x=21=4m+13sm+4st(‘普韦布洛’)、2n=4x=28=8m+15sm+4st+1t(‘胡德山’)和2n=2x=17=1m+9sm+7st(SAT)(‘温斯特丘吉尔’).5种水仙染色体数目和核型分析结果不仅可以为其分类提供细胞学依据,同时也为利用这些品种资源选育新品种提供指导. 相似文献
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对墨兰品种"阳明锦"的体细胞染色体进行了研究和分析,结果表明,其染色体数目为2n=40,为二倍体,核型公式为2n=2x=40=2M+30m+8sm,染色体主要由中部和近中部着丝粒染色体组成,核型属2B型。 相似文献
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DENG Zu-hu ZHANG Mu-qing LIN Wei-le CHENG Fu ZHANG Chui-ming LI Yu-chang LAI Li-ping LIN Yan-quan CHEN Ru-kai 《中国农业科学(英文版)》2010,9(9):1271-1277
Erianthus arundinaceus is an important, closely related genus of Saccharum officinarum L. It is therefore important to understand how the chromosomes are transmitted when it hybridizes with sugarcane. The hybrids and backcross progenies of S. officinarum and E. arundinaceus and their parents were used for Karyotype analysis and to study the law of chromosome transmission. The results showed that the somatic chromosome number of both of the E. arundinaceus Hainan92-105 and Hainan92-77 were 2n = 60 = 60sm, belonging to type 1 A, and the BC1 YC01-21 was 2n = 104 = 100m + 4sm, belonging to type 2C. The other six tested clones belonged to type 2B. The both F1s YC96-66 and YC96-40 that originated from Badila (2n = 80 = 70m + 10sm) with E. Arundinaceus were 2n = 70 = 68m + 2sm, which suggests an n + n transmission. The cross between YC96-66 (female parent) and CP84-1198 (male parent, 2n = 120 = 114m + 6sm) also followed the same genetic law and the somatic chromosome number of their progeny, YC01-3 (2n = 105 = 95m + 10sm). The cross derived from YC96- 40 (female) and CP84-1198 (male), YC01-21 had 2n = 104 = 100m + 4sm chromosomes, following the same genetic law of n + n. However, YC01-36 had 2n = 132 = 130m + 2sm chromosomes, which suggests a 2n + n chromosome transmission. It can be inferred that the inheritance of chromosomes was very complex in the BC1. The difference in chromosome number between clones was as high as 28. This could be explained by the 2n + n transmission of chromosomes. In addition, as there was not be a regular number of haploids, this phenomenon is termed as disequilibrium hybridization. 相似文献
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本文采用经改良的常规制片法,对上农香糯、上农黑糯07、太湖糯、铁桂丰四个品种及其杂交后代选系进行染色体核型分析。试验表明,它们的体细胞染色体核型,都是2n=2x=24,但核型形式略有不同。按臂比值而定的着丝点位置有两种类型,即中央着丝点(m)染色体和近中着丝点(sm)染色体,因此它们均为对称染色体核型。12对同源染色体中,有一对是随体染色体。 相似文献
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中国西部六种特有松科植物核型及细胞地理学研究 总被引:4,自引:0,他引:4
本文分析的麦吊云杉、峨眉冷杉等4种2变种松科植物属我国特有种,主产中国西部,观察到的根尖细胞核型有5种为首次报导。麦吊云杉(Piceabrachytyla)和变种油麦吊云杉(P.b.var.complanata)为2A核型,K(2n)=24=20m+4sm;天山云杉(P.schrenkianavar.fianshanica)为2B核型,K(2n=24=16m+8sm;峨眉冷杉(Abiesfabri)为2A模型,K(2n)=24=14m+8sm+2st;红杉(Larixpotaninii)为2A核型,k(2n)=24=12m+10sm+2st;高山松(Pinusdensata)为1A核型,k(2n)=24=24m。试材来源于原始林区的自然居群,根据核型资料,结合各种的生态、地理分布,进行了遗传变异及进化程度的讨论。 相似文献
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菠菜染色体核型分析表明:父本(2号)、母本(12号)及杂交种(联合1号)的核型公式分别为2n=2x=2sm+8st+2t、2n=2x=4sm+4st+4t和2n=2x=2sm+6st+4t。杂交种在核型与品质性状上同父本相似。 相似文献
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烟台绵枣儿的核型研究(英文) 总被引:5,自引:0,他引:5
[Objective] The aim of this study was to investigate the chromosome number and the karyotype of Scilla scilloides in Yantai.[Method]Root tips of Scilla scilloides were pretreated by 8-hydroxyquinoline,then fixed,dissociated and stained for slice production.The chromosome number was analyzed by microscopic examination,and then cells with good chromosomal morphology and dispersal chromosome were studied by microscopic photos.[Result]The somatic chromosome number of Scilla scilloides in Yantai was 2n=16+1Bs,while the karyotype formula was K(2n)=2x=16+1Bs=6m+4sm(2SAT)+4st+2t+1Bs and the karyotype classification was "3B" type.[Conclusion]Karyotype comparison,division of cell type and evolution of Scilla scilloides in Yantai are discussed,which provides basis for cytogenetics,evolutionary genetics,modern taxonomy and genetic breeding.1 相似文献
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两个中国水仙品种的染色体核型分析 总被引:1,自引:0,他引:1
供试的玉玲珑和金盏银台两个品种的体细胞染色体数均为2n=3x=30,是三倍体,其染色体核型形式相同,为2n=3x=24m+6sm,属基本对称式,它们的染色体相对长度及臂比总值变动不大。 相似文献