共查询到19条相似文献,搜索用时 84 毫秒
1.
2.
为给香花油茶分类地位的确认提供一定的参考,采用ISSR分子标记对11份山茶属植物的亲缘关系进行了研究,利用DPSv3.01进行聚类分析。结果表明:7个引物共扩增出77条带,其中有52条多态带,多态性比例为67.5%。根据ISSR聚类分析结果,在遗传距离为0.42时,11份山茶属植物可分为4类,第1类为5个普通油茶的无性系,即:湘林27、桂无5号、赣190、岑软2号和岑软24号;第2类为宛田红花油茶;第3类为陆川大果和博白大果油茶;第4类为香花油茶。根据研究结果可以推测香花油茶不属于普通油茶。 相似文献
3.
利用RAPD标记技术对桦树种间亲缘关系的分析 总被引:23,自引:3,他引:20
桦木属(Betula)在我国约有30种,主要分布于东北、华北、华中、西南以及西北等广大地区.其中能被开发利用的乔木有23种,这些树种的生长特性、抗性及木材物理性质差异很大,每一树种各有其优缺点(中国植物志第十一卷,1979).如果开展杂交育种研究,可以综合两个或多个树种的优良特性.由于种间杂交更容易发生在亲缘关系较近的种间,为此,对桦树种间亲缘关系的分析,是进行种间杂交的前提(王明庥,1988).本文应用RAPD技术,在DNA水平上鉴定几种桦树的亲缘关系,为开展种间杂交亲本的选配,充分挖掘基因资源提供科学依据. 相似文献
5.
6.
对福建山樱花、11份日本樱花品种和6份选优材料进行了标记,通过筛选出来的12条引物进行聚合酶链式反应(PCR)扩增。结果显示,共获得144个位点,多态性位点135个,多态性占93.75%。选取引物UBC808和UBC835构建指纹图谱,简单重复序列间扩增(ISSR)分子标记能有效地对18份樱属材料进行区分和鉴定。供试材料间的遗传相似系数在0.4532~0.8333之间,平均0.6337;遗传距离在0.1823~0.7651之间。通过非加权组平均法(UPGMA)进行聚类分析,在遗传相似性系数为0.5899时,可将18份樱属材料划分为4大类,其中选优材料与福建山樱花或日本樱花亲缘关系较近,但在花色、花期等方面有一定差异,且能区分和鉴定供试材料的亲缘关系。研究结果能为国内樱花新品种鉴定、优选和商品化等提供参考依据。 相似文献
7.
9.
10.
11.
用随机引物扩增多态性DNA(RAPD)技术对白术的3个居群进行基因组DNA多态性分析,从100个随机引物中筛选出20个10bp随机引物,共扩增出187个DNA片段,片段大小在200bp~2800bp之间,其中多态性谱带为135条,表现出了丰富的RAPD多态性(占72.2%),根据遗传距离,利用UPGMA构建了居群亲缘关系柱状图。结果表明:於术86和於术76的亲缘较近,而於术86和白术天台之间的亲缘关系较远。就单个样本来看,於术86的15个样都聚在了一起,表明了於术86较强的同源性,於术76的14个样也聚到了一起,也表明了於术76的同源性。而於术76第14个样与白术天台聚到了一起,表明了於术76与白术天台有一定的同源关系。 相似文献
12.
LIU Gui-feng DONG Jing-xiang JIANG Ying LU Yan-fang JIANG Jing ZHAO Guang-yi 《林业研究》2005,16(3):213-215
Genetic relationship of 12 species of Section Strobus was analyzed with ISSR markers. 117 loci were detected with 12 ISSR primers. Percentage of polymorphic bands (PPB) varied from 5.93% to 19.92%. P. pumila had the highest levels of genetic differentiation and P. flexilis had lowest. Total genetic diversity (Hr) of 12 species in Section Strobus was 26.21%, of which intraspecific genetic diversity (Hs) was 7.66%, and interspecific genetic diversity (DST) was 18.55%, and the genetic variation in interspecies accounted for 70.78% of the total genetic diversity. According to the cluster results of genetic distance, the 12 species were classified into two groups. The first group included P. griffithii, P.armandi, P. fenzeliana, P. kwangtungensis, P. strobus, P. monticola and P. wangii. The second group included P. albicaulis, P pumila, P. flexilis, P. sibirica and P koraiensis. 相似文献
13.
利用ISSR标记对12种五针松亲缘关系的研究 总被引:7,自引:0,他引:7
采用ISSR 标记技术,对12 种五针松的亲缘关系进行分析。利用筛选出的12 个ISSR 引物共检测到117 个位点,多态条带比率(PPB)在9.40%~33.33 %之间,遗传分化最高的是偃松,最低的是柔枝松。12 种五针松的基因多样性(Ht)为26.21%,其中种内基因多样性(Hs)为7.66%,种间基因多样性(Dst)为18.55%,五针松种间变异占总变异的70.78%。遗传距离聚类,将12 种五针松分为2 个类群,第一类群包括乔松、华山松、海南五针松、华南五针松、北美乔松、山白松和云南五针松;第二类群包括美国白皮松、偃松、、柔枝松、西伯利亚红松和红松。图1 表3 参6。 相似文献
14.
以36个月季品种为材料,应用荧光SSR标记进行月季品种分子鉴定和品种间遗传关系研究。结果显示8个SSR位点检测出85个等位基因变异,等位基因变异范围为6~15个,平均每个位点产生10.6个等位基因变异。结合8个SSR位点,每个品种均具有独特的等位基因表现型,其中位点Ra043a品种鉴定的分辨率最高,产生32个等位基因表现型,区分所有品种最少需要2个SSR位点。品种间成对遗传相似度变幅介于0.105~0.791之间,聚类结果显示36个品种聚为6类; 中国月季聚为一类,与其他月季品种存在遗传差异,起源相近月季品种分别聚为一类。研究认为SSR标记在月季品种鉴定中具备可行性,还可用于品种的遗传关系分析。现代月季遗传背景的深入研究可为未来月季新品种培育、种质资源保存等提供参考依据。 相似文献
15.
李ISSR反应体系的优化 总被引:4,自引:0,他引:4
以李品种杏梅(hybrid)和斯顿莱(Prunus domestica)为试材,研究了PCR反应体系的主要成分及退火温度对李ISSR扩增结果的影响。结果表明:在20μl的反应体系中,模板DNA含量对扩增结果影响不大,在10—80ng均能得到较好的扩增;椰用量对扩增无明显影响;而Primer、Mg^2 的最适浓度分别为0.25μmol/L、0.25mmol/L;Taq酶在0.5~1.0U均能得到好的扩增条带;退火温度在50-52.1℃范围内均能得到清晰的条带。 相似文献
16.
本文对锥栗SSR富集文库进行Illumina MiSeq高通量测序,利用生物信息学对得到的序列进行SSR特征分析,开发锥栗基因组SSR并对农家品种进行了遗传多样性分析。在2051475条序列中,总共搜索到2117345个SSR,以复合形式存在的SSR数量为640155个。二核苷酸为重复单元的SSR数量最多,占总数的73.22%,之后依次为三核苷酸(12.61%)、单核苷酸(12.56%)、四核苷酸(1.33%),单碱基重复、二碱基重复和三碱基重复的优势重复单元分别为:A/T、AC/GT、AAG/CTT。对SSR的长度多态性进行了评价。以8个农家品种为材料,在100对基因组SSR引物中筛选出多态性和特异性较好的引物10对。对25个锥栗农家品种进行了遗传多样性分析观测等位基因和期望杂合度分别为6.3和0.705,有效等位基因数为3.628,Shannon信息指数为1.441,表明锥栗农家品种具有较高的遗传多样性水平。 相似文献
17.
18.
Pakkad Greuk James Celia Torre Franck Elliott Stephen Blakesley David 《New Forests》2004,27(2):189-200
Prunus cerasoides D. Don has been identified as an excellent framework tree species for restoring evergreen forest in seasonally dry tropical forestlands. Here we describe the level of microsatellite variation in P. cerasoides trees within and among three National Parks in northern Thailand: Doi Suthep-Pui, Doi Inthanon and Doi Ang Khang, using published primers developed for peach, sweet cherry and sour cherry. The five microsatellite loci employed detected a total of 41 alleles, with the average number of alleles per locus per study site ranging from 2.7 to 8.0 (n = 82). The value of F
ST over the three sites was 0.115, indicating that while the majority of genetic diversity may be contained within sites, they should be considered as genetically distinct. The implications of this for seed collection of this species for forest restoration are discussed. 相似文献
19.
Sapindus mukorossi Gaertn. and S. delavayi Franchet are among the most valuable species in the genus Sapindus for their commercially exploitable plant oils and chemicals. However, few studies have addressed genetic variation and improvement for either species. We evaluated the genetic diversity of germplasm from selected plus trees within a wide region and established the relationship between fruit traits and molecular markers. An association analysis based on inter-simple sequence repeats(ISSRs)provided a genetic basis for studies of fruit traits. A total of 247 loci were detected by scanning 61 trees of S. mukorossi and S. delavayi using 16 ISSR markers. Genetic diversity parameters were estimated for selected superior trees(or germplasm) and S. mukorossi and S. delavayi were categorized into two main groups, as well as into four groups within S. mukorossi. An association analysis between the ISSR markers and 14 fruit traits used the TASSEL MLM model. A genetic structure analysis differentiated S.mukorossi and S. delavayi. Eighteen ISSR loci associated with 13 fruit traits(P<0.005) were identified, with 13, 1,and 4 loci associated with seed oil production, fruit saponin production, and fruit quality, respectively. Using this information, a core collection was selected with adequate genetic diversity and good seed oil characters. Our results demonstrate the feasibility of effectively estimating fruit trait associations in Sapindus using ISSR markers, and the method is applicable and valuable for select germplasm conservation. The markers obtained in this study are potentially useful for molecular-assisted breeding of Sapindus spp. 相似文献