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月季试管苗生根的形态解剖学观察 总被引：7，自引：0，他引：7
以月季无根试管苗为材料,进行瓶内和瓶外生根试验,研究了试管生根苗和瓶外生根苗的解剖构造差异,并分析了二者解剖特征与其生境的关系。 相似文献
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菊花杂交结实率与杂交种子发芽率问题探讨 总被引：7，自引：0，他引：7
对菊花杂交育种中杂交结实率和杂交种子发芽率的问题进行了探讨,认为影响结实率和发芽率的因素有杂交组合的亲和性,减数分裂行为的异常形成生活力低的花粉或不育花粉,细胞质不育基因,杂交技术,气候条件,无籽果实等。 相似文献
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A. J. Kennedy 《Euphytica》1978,27(3):767-775
Summary Surgarcane variety trial data from Barbados and Jamaica were analysed by the analysis of variance. From these analyses, components of variance were estimated in an attempt to quantify genotype x environment interactions. Sixteen sets of trials from Barbados and eight from Jamaica were analysed. The results show that GE effects in both countries were small. It is suggested, on the basis of these analyses that variety trials could use resources more efficiently by growing them at fewer sites, since the absence of site x variety interaction makes each site equally effective for identifying the best genotypes. 相似文献
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现代郁金香离体培养与快速繁殖 总被引：2，自引：2，他引：0
以现代郁金香的内层鳞片、幼茎和茎尖为外植体进行了离体培养与快速繁殖试验,筛选出最佳培养基;（1）诱导鳞片产生丛芽为MS＋0．4～1．0mg／LBA＋0．4mg／LNAA;（2）茎尖诱导培养为MS＋2mg／LBA＋0．1mg／LNAA;（3）茎段诱导培养为MS＋1．0mg／LBA＋0．2mg／LNAA）（4）丛芽增殖培养为MS＋0．4mg／LBA＋0．2mg／LNAA和MS＋0．4mg／LBA＋0．2mg／LIAA;（5）生根诱导培养为1／2MS＋0．4mg／LKT和0．1～1．0mg／LNAA。 相似文献
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A profound degree of morphological variation exists among the cultivars of Piper nigrum cultivated in Kerala State, South India. Fifty one cultivars of this crop species from the State were subjected to graph
clustering by the ‘Graph Theory’ model, based on 27 morphological characters, both qualitative and quantitative, aimed at
clustering them into groups with an appreciable degree of intracluster discreteness and intercluster distance. The result
was presented in a ‘Skyline Plot’. Ten C-clusters were formed at the c-value of 0.46 corresponding to a fairly high moat value.
The number of members from different clusters ranged from 3–8. Distribution of various characters among the clusters formed,
shows a considerable degree of intracluster similarity (connectedness) and intercluster distance (isolation). The present graph clustering is significant as it provides reliable clues for selecting parental cultivars with fair degree
of genetic difference, from clusters exhibiting appreciable isolation, for future intervarietal hybridization programmes in
the crop.
This revised version was published online in July 2006 with corrections to the Cover Date. 相似文献
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从浙江丽水的亚洲百合病叶中得到两病毒分离物G和X,电镜观察病组织汁液中含有大量线状病毒粒子,病叶细胞质中存在着柱状内含体.按照Potyvirus成员和百合斑驳病毒(Lily mottle virus,LMoV)的已知基因序列设计特异性引物,经RT-PCR扩增分别得到1692 nt和1469 nt两个片段,包含NIb、CP和3'-URT,3'-端含poly(A).将CP基因序列与侵染百合和郁金香的10个Potyvirus分离物进行同源性比较,结果表明G、X与LMoV的同源性分别为85.9%～99.4%、86.1%～99.2%(核苷酸)和87.0%～96.7%、89.9%～97.8%(氨基酸),两分离物均为LMoV.系统进化树分析显示G和X分别处在LMoV的两个群体中,同源性较低,不表现地域相关性及寄主相关性. 相似文献
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Summary Potato tubers (cvs Fina, Marfona and Spunta) were stored in a clamp in the region of Mount Vermion in Northern Greece (altitude
about 1400 m) from October 1985 to April 1986. No sprout inhibitor was applied. Tubers were analysed for dry matter and sugar
content at 2–4 month intervals. Cultivar and date of sampling had a no significant effect on dry matter but had a significant
effect on the total and reducing sugar contents. A significant interaction between cultivar and date of sampling was observed
for dry matter and sugars. A continuous increase of total and reducing sugars from October to April was found in tubers of
cv. Marfona. In tubers of cvs Fina and Spunta the total and reducing sugars increased, significantly only until March, and
thereafter decreased. 相似文献
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郁金香组培快繁技术研究 总被引：3，自引：1，他引：3
以郁金香的鳞片、茎段和茎尖为外植体进行了组培快繁技术研究,筛选出最佳培养基。诱导鳞片产生丛芽:MS+0.4～1.0 mg/LBA+0.4 mg/LNAA;诱导茎尖产生丛芽:MS+2 mg/LBA+0.1 mg/LNAA;诱导茎段产生丛芽:MS+1.0 mg/LBA+0.2 mg/LNAA;丛芽增殖培养:MS+0.4 mg/LBA+0.2 mg/LNAA和MS+0.4 mg/LBA+0.2 mg/LIAA;茎类丛芽生根诱导培养:1/2 MS+0.4 mg/LKT和0.1～1.0 mg/LNAA。 相似文献