共查询到20条相似文献，搜索用时 140 毫秒
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针对我省早熟辣散主栽品种存在的品质差、抗性弱、产量低等缺点,我们以早熟性强、品质佳、抗病抗逆性强、产量高、耐贮运为主要选育目标,在1988年南繁中选择具目标性状及其它主要经济性状表现比良、优缺点互补的亲本配组,母本为一地方品种提纯提复壮的N_2株系,早熟,株型紧凑,坐果率高,果小,长灯笼形。父本是从外地引进的一甜椒品种自交育成的J_88株系,灯笼形,果大肉厚,抗病抗逆性强。1989年经春组合比较,N_2×J_(88)组合配合力强,综合性状达到了选育目标的要求。 相似文献
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羞月1号西瓜
选育单位：北京华耐农业发展有限公司
特征特性：早熟黄瓤小果型西瓜品种。植株生长势中等,第1雌花节位为第7～8节,坐果性较强,春季保护地栽培全生育期85～90d（天）。 相似文献
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<正>新蜜1号西瓜选育单位:河南省新乡市农业科学院特征特性:属早熟品种,全生育期90d(天)左右,果实发育期28d(天)左右。根系发达,生长健壮;主蔓长250～300cm,茎粗0.7～0.9cm,主蔓第1雌花着生节位为第6～8节,雌花间隔4～6节,坐果力强;果 相似文献
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1 选育过程并农1号是从81-653-3-16×81-16-8杂交后代中选出的稳定品种。其母本81-653-3-16是从美国引进的早熟番茄品种81-653中选出的株系，田间表现植株生长势中等，主茎2～3穗果封顶，早熟，果实中小型，果肉红色，品质好，单果质量110～130g，坐果率高，单株坐果20个，成熟集中，667m2产量3400～3600kg，但后期易早衰，商品性状较差。对TMV、CMV有一定的抗性和耐性。父本81-16-8是从地方品种北京8号中选出的优良单株，植株生长健壮，坐果率一般，单果质量180～220g，果肉红色，果形圆正，较早熟，植株田间表现抗病，但易落花落果。19… 相似文献
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AIM: To investigate the effects of microRNA-422a (miR-422a) on the damage of rat adrenal gland pheochromocytoma PC12 cells induced by hydrogen peroxide (H2O2). METHODS: The expression of miR-422a in the PC12 cells treated with H2O2 was detected by real-time PCR. After miR-422a mimics were transfected into PC12 cells, the cell viability was measured by MTT assay, the lactate dehydrogenase (LDH) leakage rate was detected, and the apoptosis was analyzed by flow cytometry. Target gene prediction software was used to predict that sex-determining region Y box 6 (SOX6) may be the target gene of miR-422a. Luciferase reporter assay was used to identify the targeting relationship. miR-422a mimics and SOX6 over-expression vector were co-transfected into the PC12 cells. The effects of SOX6 over-expression on the viability, LDH leakage rate and apoptosis of PC12 cells treated with H2O2 and transfected with miR-422a mimics were evaluated. RESULTS: The expression of miR-422a in the PC12 cells was decreased after treatment with H2O2 (P<0.05). The viability of PC12 cells treated with H2O2 was decreased, and the LDH leakage rate and apoptotic rate were increased. Transfection with miR-422a mimics enhanced the viability of PC12 cells treated with H2O2, and the leakage rate of LDH and apoptotic rate of the PC12 cells were reduced. The expression of SOX6 was negatively regulated by miR-422a. SOX6 over-expression reversed the effects of miR-422a on PC12 cell viability, LDH leakage and apoptosis. CONCLUSION: miR-422a reduces the damage of PC12 cells induced by H2O2 via targeting SOX6. 相似文献
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2年新植1年宿根12个参试甘蔗品种在勐海点试验结果分析表明,比ROC22（CK1）和桂糖11（CK2）两对照种增产增糖的品种有：德蔗03-83、云蔗03-258、03-103。表现出早熟、高糖的品种有：云蔗02-588、德蔗03-68、云蔗03-422、赣蔗95-108、云蔗99-91。云蔗03-45、云瑞03-902建议给予淘汰。德蔗03-83建议作为主推品种加速繁殖。云蔗03-103、99-91、03-422、德蔗03-68,4个品种作为潜力品种因地制宜,适当扩繁。 相似文献
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"美球赤玉"是以高花青素深紫皮不育系791A为母本,以高花青素深紫皮自交系2013-5-8-3-6-1为父本培育的长日照、早熟、高花青素、深紫皮杂交种。表现:鳞茎高桩圆球形,花青素含量高达422 mg/kg;洋葱鳞片从外至里均为深紫色,色泽鲜亮;假茎细且收口紧,耐贮运,货架期长;辣味少,有甜味;单心率高,抽薹少;植株长势强,抗病;平均单球质量450 g以上,667 m2产量约8000 kg;适宜在长日照地区推广,2019-2020年累计推广面积超过500 hm2。 相似文献
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灵芝孢子油检测标准与其抗肿瘤活性的关系 总被引：2，自引：0，他引：2
利用多种分析检测手段和肿瘤细胞实验,研究了灵芝孢子油的质量检测参数与其抗肿瘤细胞活性的关系,为灵芝孢子油质量检测标准的建立提供实验参考依据。取6种不同的经CO2超临界提取的灵芝孢子油样品,用KOH标准滴定法测酸价、KI-I2法检测过氧化值、紫外-可见光分光光度法测总三萜。同时利用肿瘤细胞检测6种样品对人恶性乳腺癌细胞（MT-1）和淋巴瘤细胞（Jurka）t的抑制作用。结果表明,样品的酸价与总三萜含量和其抗肿瘤效果呈正相关,6种样品的过氧化值变化不大。高酸价样品1,其总三萜含量（16.00%）较高,在1μL·mL-1浓度抑制时,能够抑制绝大部分肿瘤细胞的生长,具有较高的抗肿瘤活性。 相似文献
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应用3种肿瘤细胞模型对未破壁灵芝孢子、机械破壁灵芝孢子和全灵芝剥壁孢子进行抗肿瘤试验研究。结果表明,未破壁及不同破壁方式的灵芝孢子对人恶性乳腺癌细胞(MT-1)、人恶性淋巴癌细胞株(Jurkat)、人恶性脑肿瘤细胞(U343)均有不同程度的抑制作用,抑制效果强弱为全灵芝剥壁孢子机械破壁灵芝孢子未破壁灵芝孢子,表明破壁的确能提高灵芝孢子对肿瘤细胞的抑制作用,而且选择破壁的方法也很重要,生物酶法破壁能使灵芝孢子的生物活性成分得到充分释放,所以大大提高灵芝孢子的功效。 相似文献
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Corridor use by small mammals: field measurement for three experimental types of Peromyscus leucopus
Eighteen mice of each of 3 types were radio-tagged and released at 6 standard points in farmland fencerows. Mice were residents (trapped on site) or translocated from distant forest or from distant corn fields. Of total (net) distance moved, most was in fencerows; 77% for residents, 83% for mice translocated from cropland and 92% for mice translocated from forest. Structurally complex fencerows were preferred significantly over intermediate or simple structures by all types of mice. Time spent in movement was not a linear function of distance moved and averaged from 12.5 to 16.5% of total available activity time. Total distance moved in 2 nights averaged 287 to 422 m and area explored averaged 0.67 to 1.15 ha and ranged to 11.0 ha; both exceed literature values for this species in forest. This enlarged scale of landscape use illustrates the potential importance of landscape-specific behaviour. The measurement of rate of corridor use also is discussed. 相似文献
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YANG Yan SUN Ting-ting XU Yong-ping ZHANG Jian-hua ZHANG Mu-xun ZHANG Xiao-jie LIU Yong-jian YUAN Gang 《园艺学报》2010,26(2):245-250
AIM: Abnormal hyperphosphorylation of tau plays a critical role in the pathogenesis of Alzheimers disease(AD), and tau protein was hyperphosphorylated in type 2 diabetes. The present study was designed to explore the phosphorylation level of tau in hippocampus of type 2 diabetes rats which interrupted by very low density lipoprotein receptor(VLDLR)gene transfection. METHODS: Wistar male rats were randomized into 3 groups. The control group(CTL)was fed with normal food. The T2DM group and T2DM mediated VLDLR gene group were on high sugar, high fat and high protein diet for 3 months. The plasma insulin level was measured by RIA method, and the plasma glucose was determined by glucose-oxidase method. Total tau level, the phosphorylation level of tau at individual phosphorylation sites and the level of VLDLR were analyzed by Western blotting. The activity of glycogen synthase kinase 3β, a key component of insulin signal transduction pathway and a known tau kinase, in the hippocampus of rats was determined by using ［γ-32P］-ATP and the specific peptide substrate. RESULTS: No significant difference of total tau level in hippocampus between T2DM group and T2DM mediated VLDLR gene group was observed. Tau protein in T2DM group was found to be more hyperphosphorylated at several AD-related phosphorylation sites(Ser214, Thr217, Ser396, Ser422 and Ser199/202)than that in CTL, while the immunoreaction at tau-1 site is weaker than that in CTL. VLDLR gene therapy reduced hyperphosphorylation sites of Thr217, Ser396, Ser422 and Ser199/202 of tau to almost the control level, but did not change the phosphorylation of Ser214 or Ser422 on tau. The expression of Ser214 was also observed by immunohistochemical assay. The phosphorylated tau modestly increased in hippocampus in T2DM group compared to CTL, but VLDLR gene treatment did not change the phosphorylation level. The phosphorylation of GSK-3β was decreased dramatically in the hippocampus in T2DM rats, and this phosphorylation was significantly increased after VLDLR gene treatment. CONCLUSION: These findings suggest that Raav mediated VLDLR gene treatment partially reverses tau hyperphosphorylation at several sites in T2DM rat hippocampus, which may mediate by inhibition of GSK-3β activity. 相似文献
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两株西藏白肉灵芝菌株特性初探 总被引：1，自引：0，他引：1
对西藏林芝地区的白肉灵芝(Ganoderma leucocontextum)菌株G-122和G-241进行鉴别分析,并对其栽培性状、有效成分含量和提取物功能等方面进行研究。基于形态学特性和ITS分析,2个菌株均鉴定为白肉灵芝。二者菌丝对峙培养产生明显拮抗线,菌丝体生物量差异显著(G-241高于G-122),子实体颜色不同(G-241和G-122分别为红褐色和黄褐色),G-241子实体单菇重高于G-122;有效成分含量差异也较大,G-122粗多糖含量高而G-241总三萜含量高;菌株G-122、G-241醇提物对乳腺癌MT-1细胞IC_(50)值分别为265.2和225.6μg/mL。实验结果表明菌株G-122和G-241为不同菌株。 相似文献
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云南核桃不同套种模式根际丛枝菌根真菌多样性 总被引：1，自引：0，他引：1
以云南省昌宁县5种不同套种模式的十年生核桃为试材,按照丛枝菌根形态学的研究方法,研究了不同套种模式下核桃根系中AMF侵染情况和根际AMF群落组成和多样性,以期为核桃种植园中AMF自然潜力的充分发挥以及菌根技术的应用提供科学参考依据。结果表明:5种套种模式的核桃园中,核桃均与AMF形成了典型的丛枝菌根共生体,根系中AMF的总侵染率在64.63%~91.81%;从5种处理的核桃根际土中共分离到6属15种AMF,其中近明球囊霉是共有的优势种;5种处理AMF的孢子密度介于86~1 442个·(50g)-1土。统计分析表明,5种不同处理核桃根系中AMF总侵染率和根际土壤中AMF孢子密度差异显著,其中套种茶树的种植园中AMF总侵染率和孢子密度最高,显著高于其它4种处理,而套种豌豆的种植园中AMF总侵染率和孢子密度最低。不同套种及相应的耕作方式对AMF的种类组成和多样性影响较大,该研究得出在土壤翻耕扰动较少的种植园,核桃根系中有较高的AMF定殖率,根际土壤中的孢子密度也较大。套种茶树较有利于核桃园AMF繁殖以及AMF数量和多样性的保持,是核桃林下一种较理想的种植模式。 相似文献
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XIA Hui-su YU Xi-yong LIN Qiu-xiong LI Xiao-hong ZHU Jie-ning MAI Li-ping LIN Shu-guang 《园艺学报》2010,26(12):2306-2310
AIM: Retinoblastoma-like protein 2 (Rbl-2) plays an important role in the cell proliferation and DNA methyltransferase (DNMT) may involve in the regulation of differentiation in embryonic stem cells. This study is to investigate the effect of knocking down Rbl-2 by specific siRNA on apoptosis in human cardiac stem cells.METHODS: The siRNA of Rbl-2 (siRbl-2) was transfected into human cardiac stem cells. The mRNA expression of Rbl-2 and DNMT-3B was detected by real-time RT-PCR 48 h after transfection. The DNMT-3B protein expression and the activation of caspase-3 were determined by Western-blotting. The cell apoptosis was analyzed by flow cytometry with annexin V-FITC/PI staining. RESULTS: Knocking down of Rbl-2 gene increased the expression of DNMT-3B in human cardiac stem cells, and induced cell apoptosis. Compared with negative control group, caspase-3 was activated and cleaved caspase-3 was increased in the stem cells transfected with siRbl-2. The cleaved caspase-3 accounted for more proportions of total caspase-3 in transfected cells than that in non-transfected cells (P<0.01). The apoptotic rate was also increased significantly in transfected group (P<0.01).CONCLUSION: Rbl-2 plays an important role in the regulation of survival and apoptosis in human cardiac stem cells. This regulatory mechanism may involve in epigenetic modification, which is mediated by DNMT. 相似文献