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《果树学报》2021,(7)
【目的】中国是猕猴桃属植物资源的原生地,秦巴地区是中华猕猴桃原变种和美味猕猴桃变种复合体的主要分布地区,对其主要种质资源群体结构进行分析,为该地区猕猴桃资源的保护及开发利用提供理论支撑。【方法】利用筛选的20个多态性丰富的SCoT分子标记,采用Beiyes算法、UPGMA法和PC方法对秦巴地区85份主要猕猴桃种质资源进行群体遗传基础分析。【结果】20个多态性SCoT标记共扩增产生108个等位位点,92个多态性位点。平均每个SCoT标记检测出5.4个位点和4.6个多态性位点,每个SCoT位点的遗传多态性信息含量在0.46～0.96,平均值为0.70。从6个猕猴桃材料中筛选到了特异SCoT引物。Beiyes和UPGMA聚类结果不同,三元主成分分析不能将85个材料明确分组。85份猕猴桃品种(系)及野生近缘种的遗传相似系数为0.54～0.94,平均为0.74。生产中栽培的36份猕猴桃品种(系)的遗传相似系数为0.63～0.90,平均为0.74。46份雌性资源的遗传相似系数为0.57～0.90,平均为0.74。36份雄性资源材料的遗传相似系数为0.60～0.94,平均为0.77。20份野生近缘种的遗传相似系数为0.56～0.91,平均为0.73。【结论】Beiyes算法分析的群体遗传结构比UPGMA和PC分析与实际更接近。秦巴地区中华猕猴桃复合体内遗传资源较丰富。野生近缘种间遗传差异较大,雌性资源的遗传差异较雄性资源大。 相似文献
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五十八份菊芋种质资源遗传多样性SRAP分析 总被引：1，自引：0，他引：1
以58份菊芋种质资源为试材,利用SRAP分子标记技术对其进行遗传多样性研究,为选育耐盐新品种提供参考依据。结果表明:从110对引物中筛选出16对多态性好的引物,共扩增出123条条带,其中多态性条带90条,多态性比率为72.7%。利用NTSYS软件统计分析出菊芋资源间遗传距离为0.01~0.52。应用UPGMA聚类可将58份菊芋资源划分为三大类群,第一大类群分为4个亚类群。表明利用SRAP技术更能充分揭示菊芋资源间的遗传差异,可作为种质鉴定依据。 相似文献
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以中国石蒜离体培养再生的幼苗为试材,首次采用ISSR和SRAP分子标记对再生苗的遗传稳定性进行了检测,以探讨体细胞无性系变异情况及成因.结果表明:所选用的14条ISSR引物共产生191条带,其中只有1条为多态性条带,并且该条带表现为新增条带;SRAP标记所选用的15对引物共扩增出219条带,其中3条为多态性条带,表现为共有条带缺失.综合2种分子标记检测结果来看,再生植株表现出的体细胞变异率极低(0.97％).现有数据同时也表明,已建立的离体培养体系在保存中国石蒜种质资源和遗传改良上是稳定、可行的. 相似文献
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以12份杧果种质为试材,利用SRAP分子标记技术对其进行遗传多样性研究。结果表明:从36对引物中筛选出22对多态性好的引物,共扩增出251条DNA条带,其中多态性谱带181条,平均每对引物扩增得到15.08条多态性谱带,多态性比率为72.11%。UPGMA聚类表明,所有供试品种(系)之间的亲缘关系都比较近,相似系数在0.77~0.89;如果以相似系数0.78为标准,可将供试的12个品种(系)分为3类。表明利用SRAP技术能较好的区分杧果的亲缘关系;SRAP分子标记适合杧果的DNA遗传多样性分析,可作为杧果种质鉴定依据之一。 相似文献
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《果树学报》2021,(5)
【目的】分析黄桃种质的遗传多样性和亲缘关系,为选育新品种提供理论依据,有效避免骨干亲本重复利用和新品种遗传背景单一的问题。【方法】基于SCoT引物对19份黄桃材料进行遗传多样性分析,并利用软件NTSYS2.10进行聚类分析和主坐标分析。【结果】15条SCoT共扩增出283条清晰条带,多态性条带共277条,多态性比率为97.88%。19份黄桃材料遗传相似系数的变异范围为0.186～0.635,平均为0.324。聚类分析将19份桃材料分为5个群组,表明19份黄桃材料的遗传背景存在差异,遗传背景丰富。经主坐标分析,得到与聚类分析类似的结果。【结论】15条SCoT引物对19个黄桃材料进行有效区分,并将其分为5个组。19个黄桃材料的遗传背景存在显著差异。 相似文献
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利用SSR分子标记对来源于江西省奉新县和信丰县的72份猕猴桃种质进行聚类分析并构建其指纹图谱,以期为猕猴桃分子标记育种奠定基础。结果表明,从60条引物中筛选出的6对引物(FOR1、FOR7、FOR8、FOR16、A124和A059)可以完全区分供试种质,6对引物共检测出70个等位基因;每对引物可检测到等位基因数9～17个,平均每个SSR条带能检测到11.7个等位位点;各对引物所得的多态性信息含量(PIC)在0.792～0.904之间,平均为0.828。供试种质的遗传距离的范围为0.029～0.329,平均遗传距离为0.176。在相似系数0.087的水平上,供试种质可分为六大类。利用筛选出的6个SSR引物在72份供试猕猴桃种质上获得的多态信息,每份种质均得到唯一的DNA指纹图谱。 相似文献
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The effects of combinations of salinity (no salt, 2000 p.p.m. or 4000 p.p.m. of CaCl2 and NaCl, 1:1) and water table (30 cm, 60 cm or 90 cm from the soil surface), on the vegetative growth and tolerance of ‘Golden Japanese’ plum and ‘Mit Ghamre’ and ‘Balady’ peaches were studied. The plants were grown in lysimeters. The growth of the trunk, total shoot length, the increase in shoot length per cm and the fresh weight of top, root and total plant were reduced with increasing salinity of the irrigation water. The effect was accentuated when the plants were maintained at high water table level. The salinity treatments resulted in the death of 43%, 73% and 76% of the plants in the plum, and the ‘Mit Ghamre’ and ‘Balady’ peaches, respectively, indicating that the plum is more tolerant to salinity than the peach. The plants of the salinity treatments showed various symptoms of salt injury, such as leaf burn, defoliation, shoot die-back and finally death. In the peaches, salt injury started to occur in the first growing-season, whereas the salt injury appeared in the plum in the second growing-season. The symptoms were more pronounced in the 4000 p.p.m. treatment than in the 2000 p.p.m. treatment and were more pronounced at the high water table level. The salinity level was the predominant factor and the effect of the water table on the vegetative growth diminished with increase in the salinity level of the irrigation water. 相似文献
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AIM：To establish a fast, accurate and economical technique for culturing mouse pulmonary arteriolar smooth muscle cells (PASMCs), and to explore the effects of hypoxia on the proliferation and apoptosis of the PASMCs. METHODS：In sterile condition, the pulmonary artery was isolated from the male BALB/c mice by digesting with collagenase I, and the cells were cultured in fetal bovine serum-coated flask. Centrifugal procedure was not used during the cell passage. The cell morphology was observed under an inverted phase-contrast microscope. α-Smooth muscle actin was identified by immunocytochemistry and immunofluorescence. The effects of hypoxia on the proliferation and apoptosis of the PASMCs were detected by CCK-8 assay and TUNEL assay. RESULTS：PASMCs were identified by the methods of immunocytochemistry, immunofluorescence staining and observation of morphology. Unlike the rat PASMCs with typical subcultured peak-vally pattern, the mouse PASMCs showed a lot different without a peak-vally pattern. The cells could be subcultured after 5 d to 7 d and there was 3 to 5 generations depending on the activity of the cells. CCK-8 assay demonstrated that the A values of PASMCs exposed to hypoxia increased after 24 h (P＜0.05) as compared with normoxia. TUNEL result showed that the apoptotic index of the PASMCs in hypoxia decreased after 24 h (P<0.05). CONCLUSION：This technique for obtaining cultured mouse PASMCs is simple, fast, accurate and economical. The digestion time is easy to control. Hypoxia promotes the proliferation and inhibits the apoptosis of PASMCs. 相似文献
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小檗碱和壳聚糖抗蔬菜病原真菌活性测定及复合膜制备 总被引：2，自引：0，他引：2
研究了小檗碱和壳聚糖对几种常见蔬菜病原真菌的抑制活性,以及以小檗碱和壳聚糖为主料制备复合膜的方法,并测定了该膜的药物释放效果。试验表明:低浓度(0.234 mg/mL)小檗碱即可抑制辣椒炭疽病菌(Vermicularia capsici)等5种蔬菜病原真菌的生长。20 mg/mL浓度壳聚糖对番茄灰霉病菌(Botrytis cinerea)的抑制率高达65%,而对其余4种果蔬病原真菌也有一定的抑制作用。为了集成这2种天然化合物的优点,制备了小檗碱-壳聚糖复合膜,该膜具有缓释功能,在模拟外部环境(磷酸缓冲液,pH 6.8)条件下,20 d小檗碱累计释放率接近25%,提示其在果蔬贮藏抗菌中的应用价值。 相似文献
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钾肥在小白菜和萝卜上的施用效果 总被引：6，自引：0，他引：6
采用盆栽试验方法研究了施用钾肥对小白菜、萝卜生长发育、产量、品质及钾素含量的影响。结果表明 ,施用钾肥对小白菜和水萝卜的株高、叶片数无显著的影响 ,但可提高水萝卜块根的产量 ,提高幅度为 31.0 4 %～ 97.93%。施用钾肥可提高小白菜和萝卜的蛋白质和VC含量 ,降低硝酸盐含量 ,增加植株的钾素含量 相似文献
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Fresh onion seeds desiccated to 6.0% seed moisture content (SMC) were stored in various packaging materials under different storage conditions. Seeds packed in aluminum-laminated pouches beside those stored with silica gel at 25 °C maintained satisfactory germinability and vigour after 12 months. Desiccated seeds stored in moisture impervious containers produced more vigourous seedlings. Germination potential of onion seeds increased with reduced SMC besides storage in moisture impervious packets along with desiccants as physiological and biochemical attributes are regulated. Seed viability and vigour decreased with accelerated ageing due to increased lipid peroxidation, decreased activities of several free radical and peroxide scavenging enzymes. Electrical conductance of seed leachates also increased with ageing. Thus, adoption of appropriate storage temperature and moisture control techniques would significantly affect onion seed quality, which was due to minimum accumulation of free peroxide radicals and enhanced activity of free radical scavenging enzymes. 相似文献