共查询到18条相似文献,搜索用时 93 毫秒
1.
利用普通小麦(Triticum aestivum L.)“小偃6号”与黑麦(Secale cereale L.)品种“德国白粒”杂交,选育出“小偃6号”类型带有黑麦性状的种质材料。应用总基因组原位杂交(GISH)进行检测,在8份材料中探测到黑麦染色质的存在,其中附加系3个,代换系1个,易位系4个;进一步用荧光绿标记探针pSc119.2及荧光红标记探针pAs1的双色荧光原位杂交(FISH)技术,对其中部分品系的染色体组成进行分析鉴定,结果表明:易位系BC116-1是1RS/1BL小麦/黑麦易位系,BC152-1是涉及一条1B染色体的1RS/1BL易位系, 代换系BC97-2是2R(2D)二体代换系;附加系BC122-3附加了一条6R黑麦染色体,一条6B染色体的长臂缺失。同时,对连续的总基因组原位杂交和双色荧光原位杂交技术在小麦育种中的应用进行了讨论。 相似文献
2.
利用1980-1995年品种比较试验资料和大面积生产中的有关资料对陕西关中地区小麦骨干品种小偃6号进行综合分析。结果表明,小偃6号稳产的原因是:抗病性好、抗逆性强、适应性广、产量构成三要素协调。 相似文献
3.
通过以山羊草等23种不同异源胞质的中国春为母本,以小偃6号为父本,经过七代核置换回交,培育成功了23种不同细胞质的小偃6号核质杂种。和对照小偃6号比较分析,发现不同的异源细胞质对小偃6号的抽穗期,条锈抗性、结实率等9个农艺性状都有着较明显的影响。 相似文献
4.
小偃6号小麦的慢锈性鉴定及菌丝在寄主体内的超微结构观察 总被引:3,自引:0,他引:3
三年大田接种试验结果表明,小偃6号是一个典型的慢锈性品种,其慢锈性主要表现在潜育期长,严重度低和千粒重损失率低,该慢锈性无小种专化性现时还首次从超微结构揭示了慢锈性的抗性 机亘是由于菌丝过早老化引起。菌丝老化表现在菌丝体丙液泡增加,变大,菌丝顶端细胞壁加厚。 相似文献
5.
6.
应用荧光原位杂交和RFLP标记检测多小穗小麦新种质10—A中的黑麦染 … 总被引:4,自引:0,他引:4
利用APAGE,荧光原位杂交技术和RFLP标记,对导入黑麦(SecalecerealeL.)多小穗等性状创制的小麦新种质10-A进行了分子标记检测,APAGE分析发现,10-A与其他1RS/1BL易位系一样,含有1RS的醇溶蛋白标记位点Gld1B3。以黑麦基因组总DNA作探针,用中国春(Triticumaestiumcv.ChineseSpring)基因组DNA作封阻,与10-A根尖细胞有丝分裂染 相似文献
7.
8.
小麦品种小偃6号染色体结构变异的细胞学研究 总被引:6,自引:4,他引:6
本文报道了小麦品种小偃6号的染色体结构变异。小偃6号及其亲缘品种与中国春小麦杂交,杂种F_1染色体配对资料表明:小偃6号及其父本小偃96与中国春在染色体结构上有很大差异。八倍体小偃麦小偃693与小偃6号和小偃96杂种F_1减数分裂中期出现19″+2′′′+5′的染色体构型,说明小偃6号和小偃96至少含有两个长穗偃麦草染色体片段。将小偃6号与中国春双端体系列杂交,杂种F_1中1AL、2AS、5AS、6AS和7BS端着丝点染色体配对频率极显著地低于(中国春×小偃6号)F_1的平均染色体臂配对频率(90.1%),从而将小偃6号中的异源片段局限于这5个染色体臂内;同时发现:1AL、2DS、4DS、6AL及3B(t″s+t′L)端体中的端着丝点染色体参与了杂种F_1中多价体的形成,或与此有关,故认为小偃6号与中国春至少有两个相互易位的差异,涉及到染色体1A、2D、3B、4D和6A。文章还对小偃6号异源易位的起源和鉴定等进行了讨论。 相似文献
9.
应用荧光原位杂交和RFLP标记检测多小穗小麦新种质10-A中的黑麦染色质 总被引:9,自引:0,他引:9
利用APAGE、荧光原位杂交技术和RFLP标记,对导入黑麦(SecalecerealeL.)多小穗等性状创制的小麦新种质10_A进行了分子标记检测。APAGE分析发现,10_A与其他1RS/1BL易位系一样,含有1RS的醇溶蛋白标记位点Gld1B3。以黑麦基因组总DNA作探针,用中国春(Triticumaestivumcv.ChineseSpring)基因组DNA作封阻,与10_A根尖细胞有丝分裂染色体进行荧光原位杂交。结果表明,黑麦的1RS易位到10_A中。用25个RFLP探针进行Southern分析,进一步发现10_A的1BS特异限制性片段发生丢失,代之以黑麦1RS的特异限制性片段,而位于其他染色体上的特异限制性片段未发生缺失。据此认为,多小穗小麦新种质10_A属于1RS/1BL易位系。同时还讨论了10_A在小麦遗传改良中的利用情况。 相似文献
10.
11.
Phylogenetic relationships of the different species in the genus Dendranthema (DC.) Des Moul. were estimated based on chromosome fluorescent in situ hybridization (FISH) with 18S-26S rDNA of Arabidopsis and genomic DNA of Dendranthema as probes. The results revealed that there was no positive correlation between the number of nuclear organization region (NOR) loci and the ploidy of Dendranthema.The exact cytogenetic information of NORs about 14 operational taxonomic units (OTUs) indicated that D.vestitum (Hemsl.) Ling et Shih was closer to the cultivars than other putative species, whereas D. zawadskii (Herb.) Tzvel. was the most distinct. The ambiguously distributed signals of genomic in situ hybridization (GISH) with genomic DNA of lower ploidy species as probes suggested that different genomes among Dendranthema were mixed. The result also indicated the limitation of GISH in studies on the phylogenetic relationships of the different species in this genus Dendranthema and on the origin of cultivated chrysanthemums. Based on these results and previous research, the origin of Chinese cultivated chrysanthemum is discussed. 相似文献
12.
Si-LanDAI Wen-KuiWANG Mao-XueLI Ying-XiuXU 《植物学报(英文版)》2005,47(7):783-791
Phylogenetic relationships of the different species in the genus Dendranthema (DC.) Des Moul. were estimated based on chromosome fluorescent in situ hybridization (FISH) with 18S-26S rDNA of Arabidopsis and genomic DNA of Dendranthema as probes. The results revealed that there was no positive correlation between the number of nuclear organization region (NOR) loci and the ploidy of Dendranthema.The exact cytogenetic information of NORs about 14 operational taxonomic units (OTUs) indicated that D.vestitum (Hemsl.) Ling et Shih was closer to the cultivars than other putative species, whereas D. zawadskii (Herb.) Tzvel. was the most distinct. The ambiguously distributed signals of genomic in situ hybridization (GISH) with genomic DNA of lower ploidy species as probes suggested that different genomes among Dendranthema were mixed. The result also indicated the limitation of GISH in studies on the phylogenetic relationships of the different species in this genus Dendranthema and on the origin of cultivated chrysanthemums. Based on these results and previous research, the origin of Chinese cultivated chrysanthemum is discussed. 相似文献
13.
经1×10-6mol/L视黄酸诱导的P19细胞体外可向神经方向分化,接种于多聚赖氨酸(polyDlysine)和纤连蛋白(fibronectin)包被的玻片后,细胞逐渐聚集成团,此时细胞的贴壁性较差,进行原位分子杂交时容易脱落。我们尝试在细胞表面覆盖一层明胶,减少了细胞的脱落,又比较了蛋白酶K和胃蛋白酶对细胞蛋白质的消化作用,确定胃蛋白酶可较温和地消化细胞蛋白质,使探针有效地透入结合,杂交后细胞亦能较完整地保留于玻片上。 相似文献
14.
15.
In Situ Hybridization of Lilium Whole Mount Synaptonemal Complex Chromosomal Preparations 总被引:1,自引:0,他引:1
Clare A. Hasenkampf 《Biotechnic & histochemistry》1991,66(4):210-215
Whole mount meiotic preparations of the synaptonemal complex complement of Lilium have been used for in situ hybridization experiments. A probe of the maize ribosomal DNA gene cluster has been successfully hybridized to the lily preparations. Three strong signals, corresponding to the three known lily nucleolus organizer regions, have been seen in most of the chromosome preparations. In situ hybridization experiments using meiotic preparations should be useful for identifying specific chromosomes, and for investigating the role of particular DNA molecules important to meiotic function. 相似文献
16.
17.
Chong-Hua Yao Sohei Kitazawa Takahiro Fujimori Sakan Maeda 《Biotechnic & histochemistry》1993,68(3):169-174
A bromodeoxyuridine (BrdU) labeled DNA probe was used for in situ hybridization at the electron microscopic (EM) level. A BrdU labeled DNA probe was hybridized in situ to cryostat sections of paraformaldehyde fixed OCT compound embedded cultured HL-60 cells. After hybridization, some sections were incubated with FITC-conjugated anti-BrdU monoclonal antibody for fluorescence microscopy (FM). and others were embedded in Quetol for electron microscopy (EM). The ultrathin sections of Quetol-embedded specimens were incubated with the anti-BrdU monoclonal antibody and the immunoglobulin: gold colloid. In both FM and EM studies, the signals were concentrated in the rough endoplasmic reticulum. Moreover, some label was arranged from the nucleus to the cytoplasm at the EM level. Relatively simple methods using the BrdU labeled DNA probe for the detection of the defined nucleic acid sequence with reasonable tissue preservation and high resolution are described here. This method may be useful for developmental and disease related studies of specific mRNA in cells and tissues. 相似文献
18.
We have investigated the applicability of human papillomavirus (HPV) DNA detection by in situ hybridization with biotinylated probes in epithelial cells obtained from the cervix using a cotton tip swab. We describe a simple procedure for obtaining homogeneous cell samples and good preservation of cellular structure. This is achieved by pretreatment of cells with L-cysteine before hybridization. Separate denaturation of cellular DNA and probe DNA is also necessary for satisfactory results. Both benign HPV DNA 6/11 and potentially oncogenic HPV DNA 16/18 could be identified in our series. In situ hybridization on cervical scrapes is a rapid, simple and very specific method for detecting patients infected with oncogenic HPV types. 相似文献