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通过调查并结合有关文献和植物标本研究表明,青海省蔷薇科野生果树有60种(含2个变种、1个变型),隶属于10属,占全省野生果树总数的53.6%。其中以蔷薇属(Rosa)和栒子属(Cotoneaster)最为丰富,分别有13种、12种,其次悬钩子属(Rubus)和李属(Prunus)分别有9种、8种,这4个属的种类占青海蔷薇科野生果树的70%;果实类型有梨果、聚合果、核果3种类型,其中梨果类、聚合果类占有较大比例,分别占总种数的45%和40%。青海省蔷薇科野生果树不少种类具有抗寒耐旱等特性,可作为砧木或抗性育种材料,一些种类果实营养较为丰富。青海蔷薇科野生果树主要分布于东部的黄河、湟水河及大通河流域,并划分为西倾山区、祁连山区和青南高原区3个分布区域,分析了各区的种类和分布情况;垂直分布在海拔1800~4000 m之间。另外,对几种重要野生果树资源进行了评价,并提出了开发利用的建议。 相似文献
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对栽培和野生中国樱桃进行De novo基因组测序和比对,在全基因组范围内检测筛选出50 617个InDel位点,并挑选均匀分布的200个标记进行验证,其中,27个标记在中国樱桃种内表现出多态性。利用多态性标记,对不同来源的192份中国樱桃(168份栽培和24份野生)种质进行基因型分型,共检测到60个等位基因(Na),平均每个标记2.2个;基因多样性指数(Hs)为0.010 ~ 0.500,平均0.239;多态性信息含量(PIC)为0.010 ~ 0.375,平均0.198,表明中国樱桃遗传基础相对狭窄。根据聚类结果和地理分布将192份中国樱桃种质大致划分为5个群体。筛选出在蔷薇科李亚科樱属、李属、桃属、杏属、苹果亚科梨属、苹果属和蔷薇亚科草莓属、悬钩子属等重要果树共8个属156个个体中表现出较好通用性标记34个。物种与中国樱桃亲缘关系越近,InDel标记的多态性越高。 相似文献
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从嫁接植株成活率、成活植株幼苗长势、耗时耗工量、操作复杂程度4个方面,对蔷薇科植物常用嫁接技术(劈接、插接、靠接)进行研究,结果表明,插接嫁接成活率高、成活植株长势好、省时省工、操作方法简单,优于劈接和靠接嫁接方式。 相似文献
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报道了广东省蔷薇科2种新记录植物,分别为福建悬钩子Rubus fujianensis Yu et L(u)、毛叶石楠Photinia villosa (Thunb.) DC.,标本存放于华南农业大学林学院植物标本室(CANT). 相似文献
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A total of 73 Erwinia amylovora strains obtained from 13 Maloideae host species and from Rubus spp., and isolated from different geographic areas, were assessed using RFLP and DNA sequencing analysis of the 3' hrp N gene and/or of a fragment of 1341 bp of the dsp A/E region. An Erwinia pyrifoliae strain, used as outgroup, was checked in the same way. For the three strains isolated from Rubus spp. and for one strain from Amelanchier sp., RFLP analysis of the hrp N gene using the Rsa I enzyme yielded a PCR product 60 bp smaller than that of all the other strains. Sequence analysis of the gene revealed this was due to the absence of a 60 bp fragment in the noncoding region downstream of the gene. The strain PD 2915, isolated from Amelanchier sp. grown in Canada, showed five same-sense substitutions and one missense substitution at position 868 of the hrp N gene, converting aspartic acid into asparagine. Also, restriction analysis of a fragment of 613 bp of the dsp A/E region with Cfo I revealed an RFLP pattern suitable for differentiating the E. amylovora strains isolated from Rubus spp. and Amelanchier sp. from all the others. In the dsp A/E coding region, the four strains showed 13–14 missense point mutations, in some cases yielding drastic amino acid substitutions. In addition, partial sequencing of the dsp A/E region of PD 2915 from Amelanchier sp. indicated a higher similarity to E. amylovora strains isolated from Rubus spp. than towards strains from other Maloideae hosts. The E. pyrifoliae strain showed 23 single nucleotide substitutions along the hrp N gene and 88% of nucleotide identity with E. amylovora strains in the portion of dsp A/E region. Artificial inoculations on immature pear fruits and young shoots of Maloideae and Ruboideae showed a restricted pathogenicity for the strains from Rubus and Amelanchier , with the latter inciting blight symptoms only on Amelanchier . 相似文献
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New Potentilla synonyms of the Fragaria species names are discussed and considered to be dispensable. Further unnecessary nomenclatural changes based on the argument to recognize monophyletic but not paraphyletic taxa should be avoided to maintain nomenclatural stability for global communication about plant genetic resources. The new combination Fragaria×rosea (Mabb.) K. Hammer et Pistrick is presented for the hybrid Potentilla palustris (L.) Scop. ×Fragaria×ananassa Duchesne ex Rozier. 相似文献