共查询到18条相似文献,搜索用时 234 毫秒
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引进扁桃的品质特性观察 总被引:6,自引:0,他引:6
从美国引进的3个扁桃品种,用山桃作砧木,在陕西渭北地区生长旺盛,苗木栽植第3年开始开花结果,5年生平均株产1.78~2.03kg。扁桃3月中下旬开花,果实前期发育较快,至5月中旬果径生长量占总量的80%~90%,后期增长缓慢。Nonpareil品种7月25日~8月5日成熟,Mission品种9月11日~9月15日成熟。成熟种仁饱满,外观品质较好。种仁含粗脂肪49.62%~52.49%,含粗蛋白20.9%~29.0%,含VB11.8~1.91mg/kg,VB24.08~4.62mg/kg。氨基酸及钙、镁等元素含量也较丰富,与我国新疆扁桃主产区产品营养含量相近似。 相似文献
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兰州地区引种的美国扁桃的越冬伤害与临界致死低温 总被引:17,自引:1,他引:17
通过田间越冬指数调查、组织变褐法和电导法配合Logistic 方程求拐点温度的方法, 对7 个从美国引入的扁桃品种的抗寒性进行评价。结果表明: 扁桃幼树1 年生休眠枝的低温半致死温度( LT50) 为- 18. 0 ~ - 24. 5; 其中 Butte和 Padre的抗寒性较强, 半致死温度约为- 24. 5; Nonpareil、Price! 和 Monterey! 的抗寒性中等, 半致死温度约为- 20. 9; Ne Plus! 和 Sonora! 的抗寒性较弱,半致死温度约为- 18. 3。 相似文献
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新疆巴旦杏(扁桃)生产现状及发展对策 总被引:1,自引:0,他引:1
巴旦杏又称扁桃 ,是新疆名、特、优干果木本油料树种之一。栽培品种主要分布于南疆喀什地区的英吉沙、莎车和疏附等县 ,具有喜光、抗旱、抗寒、耐高温、耐瘠薄的特性 ,适应性强 ;果实营养丰富 ,且具有较高药用价值 ,市场前景广阔。以下就新疆地区巴旦杏生产中存在的问题及发展对策提出一些看法。1 品种单一 ,应引进国外良种 新疆目前栽培的扁桃均为本地品种 ,最高株产仅 2 .63~ 3 .86kg,667m2 (亩 )产量仅 65 .2~ 95 .7kg。美国巴旦杏产量高 ,应引进一些适应当地的优良品种。2 果仁小、商业价值不高 ,应注重当地优良品种的选育 新疆巴… 相似文献
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以引进的6个樱桃番茄品种为试材,比较分析了各品种的植物学性状、果实商品性状、果实品质及产量,以保障宁夏设施樱桃番茄优质高效生产及增加农民收益。结果表明:"朱丽叶"长势强,始花位点低,总花序多,果实成熟早,产量和品质居中;"黄太子"植株长势弱,始花位点高,总花序、产量和品质居中;"仙女"植株长势、始花位点、总花序均居中,果实成熟最晚,品质居中,产量最低;"金珠"总花序较少,果实成熟较晚,果实品质较差,产量居中;"甜喜"总花序最少,单果重最高,产量最高,品质较好;"甜樱桃"长势居中,口感好,但硬度和产量较低。综合比较,"甜喜"适宜当地大面积推广,"朱丽叶"适宜作为远销品种大量推广。 相似文献
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中国野生毛葡萄芪合酶基因抗白粉病功能分析 总被引:1,自引:0,他引:1
中国野生毛葡萄(Vitis quinquangularis)‘丹凤–2’白藜芦醇含量高,并抗白粉病。以此为材料,利用同源序列克隆技术获得两个芪合酶基因VqSTS12和VqSTS25。以欧洲葡萄‘无核白’分生愈伤组织为受体材料,通过农杆菌介导法进行遗传转化,分别获得7个VqSTS12和5个VqSTS25‘无核白’葡萄转基因植株。实时定量PCR分析发现,与野生型植株相比,转基因植株中芪合酶基因STS与下游白藜芦醇糖基转移酶基因RSGT表达量升高,与STS有底物竞争关系的查尔酮合酶基因CHS表达量降低。STS的表达产物中主要的芪类物质反式云杉新苷含量增加。选择芪类物质含量高的转基因植株接种白粉菌发现,转基因植株对白粉菌的敏感性降低,发病较晚,病情较轻,在转基因植株上部分孢子萌发受抑制,菌丝发育迟缓。转基因植株中VqSTS12和VqSTS25受白粉菌诱导表达:在接菌后1~3 d内表达量显著升高,随后略有下降,在6~7 d表达量再次上升。同时高效液相色谱(HPLC)检测到STS的表达产物白藜芦醇、云杉新苷、葡萄素与紫檀芪含量增加。研究结果表明‘丹凤–2’毛葡萄VqSTS12和VqSTS25及其表... 相似文献
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用于无核葡萄选育的胚挽救技术研究 总被引:4,自引:1,他引:3
通过4a的连续试验,观察了无核葡萄果粒及胚珠发育变化,对胚挽救的多个影响因素包括品种、接种时间、培养基和培养方式进行了研究。结果表明,红脸无核、底来特、黎明无核作母本的胚珠萌发率较高;各品种适宜的接种时间为无核白花后26d,红脸无核花后35d,爱莫无核×火焰无核花后48d,底来特×红宝石无核花后56d;用Nitsch作基本培养基优于B5;添加BA0.2mg/L获得的胚珠萌发率最高;常温黑暗、固体培养有利于胚珠的发育。已定植结果的无核葡萄杂交胚挽救后代的无核比率平均为58.6%。将胚挽救技术用于无核葡萄育种是十分有效的。 相似文献
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在植物赤霉素合成代谢中,GA3ox可将几种非活性赤霉素转化为具生理活性的赤霉素。以葡萄有核品种‘黑比诺’和无核品种‘无核白’为材料,克隆葡萄的VvGA3ox基因家族成员,分析基因结构、进行染色体定位和系统发育树构建,检测其组织器官表达特性和在胚珠(幼种子)发育过程的表达变化。结果表明,葡萄基因组VvGA3ox家族有3个成员,cDNA长度分别为1 313、1 225和1 480 bp,都包含2个外显子和1个内含子结构。组织器官特异性表达分析表明,VvGA3ox1在胚珠中的表达很低,在根中高表达;VvGA3ox2和VvGA3ox3在花和胚珠中的表达较高。在受精后胚珠(幼种子)发育过程中,VvGA3ox家族基因的表达趋势存在差异,其中VvGA3ox1在‘黑比诺’与‘无核白’中均是在盛花后30 d时上调之后下降;VvGA3ox2在‘黑比诺’中20 ~ 30 d极速上调之后下降,相应地‘无核白’中是先缓慢下降之后上升;VvGA3ox3在‘黑比诺’中逐渐下降,对应地‘无核白’中是在10 ~ 15 d先上升后在20 ~ 45 d呈下降趋势并逐渐与‘黑比诺’中的表达持平。VvGA3ox在有核和无核葡萄品种中表现较大差异表达,与葡萄无核性状有一定关系。 相似文献
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Chockpisit Channuntapipat Terry Bertozzi Margaret Sedgley 《The Journal of Horticultural Science and Biotechnology》2013,88(2):228-232
SummaryShoot tips of two almond scion cultivars, ‘Ne Plus Ultra’ and ‘Nonpareil 15-1’, and one almond/peach hybrid rootstock were successfully cryopreserved using a one-step vitrification technique. Three week old in vitro cultures were cold-hardened at 4°C on the multiplication medium (Murashige and Skoog for ‘Ne Plus Ultra’ and the hybrid rootstock; Almehdi and Parfitt for ‘Nonpareil 15-1’) for three weeks. Shoot tips, 2–2.5 mm long, were excised and precultured for 1 d at 4°C on the same basal medium, without plant growth regulators, supplemented with 0.7 M sucrose. After the preculture, the shoot tips were incubated in vitrification solution at 25°C for 45 min for the almond scion cultivars and 60 min for the hybrid rootstock, and then stored under liquid nitrogen (LN) for at least 3 d. After rapid thawing at 30°C, the shoot tips were washed with the appropriate liquid basal medium containing 1.0 M sucrose and then cultured on the same basal medium, solidified with agar, but excluding NH4NO3 or (NH4)2SO4. Shoot regeneration was usually observed within 2–3 weeks. Survival after LN, recorded as the percentage of shoot tips that produced at least one new shoot four weeks after thawing, was 87.5, 60.0 and 72.5% for ‘Ne Plus Ultra’, ‘Nonpareil 15–1’ and the hybrid rootstock respectively. The one-step vitrification method is a promising simple technique for cryopreserving almond scion and rootstock shoot tips from in vitro cultures. 相似文献
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AIM: To investigate the feasibility and reliability of using laser Doppler flowmetry (LDF) to evaluate the animal model of cerebral ischemia and reperfusion injury in vivo. METHODS: Ten Sprague-Dawley (SD) male rats, weighing 280-310 g, were subject to unilateral middle cerebral artery occlusion (MCAO) with the routine method of line-embolism, and the cortical blood flow was continuously monitored by LDF during ischemia and reperfusion in the rats. Meanwhile, the degree of injury induced by cerebral ischemia and reperfusion was evaluated after MCAO by the nervous scoring of rat criteria. Brain slices were obtained by the method of neck end breaking and brain autopsy at the time point of ischemia for 2 h and reperfusion for 24 h. The volumes of infarction in the brain slices were determined by TTC staining. RESULTS: (1) In the successful MCAO rats, the average local blood flow remarkably decreased from the baseline value of (224.99±75.00) PU to (67.23±6.90) PU in the ischemic period. The mean difference was 157.76 PU and decreasing amplitude of local blood flow was more than 70% by MCAO. In the reperfusion period, the average local blood flow was rapidly recovered to (216.01±7.30) PU after the embolus was pulled out, which was only slightly lower than that of the baseline level without statistical significance. However, the mean difference of 148.78 PU between the local blood flow of reperfusion and local blood flow of cerebral ischemia for 2 h was found (P<0.01). The average local nervous score was 10.35 at 24 h after cerebral ischemia and reperfusion,higher than that of the baseline (0 point). The infracted evidence with remarkable brain edema in the brain slices was clearly observed with TTC staining. (2) In the unsuccessful MCAO rats, the decrease in local blood flow was less than 50%. The local nervous score was 0 point at 24 h, which was equal to the baseline value. No local infraction and brain edema was observed in the brain slices. CONCLUSION: Besides using the local nervous functional scoring, continuously monitoring of blood flow by LDF in vivo is a reliable and useful method to confirm the successful establishment of rat MCAO model. 相似文献
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雄性不育板栗雄花序败育过程中的形态学特征及内源激素含量的变化 总被引:3,自引:0,他引:3
采用石蜡切片法,观察了雄性不育板栗品种浮来无花雄花败育过程中的形态变化特征,同时在雄花序发育的8个不同时期,测定了雄性不育板栗品种雄花序中IAA、GA3、ZT及ABA含量的变化。结果表明:雄性不育品种“浮来无花”比可育品种“大红袍”晚3d进入花簇原基形成期,此期开始出现维管束发育不良;晚3d进入花朵原基形成期,维管束同样发育不良;花被原基形成期,“浮来无花”维管束细胞排列疏松,“大红袍”维管束细胞排列紧密而清晰;两品种相差4d进入雄花原基形成期;花药形成期“浮来无花”开始出现雄蕊退化,且停止发育,不能形成花粉粒,属无花粉囊型不育。雄性不育品种雄花序IAA含量除雄花序刚长出时高于可育品种,其它时期均低于可育品种,在雄花序即将脱落时IAA含量仅为大红袍的8%;雄性不育品种GA3含量各个时期均高于可育品种,前期差异显著;雄性不育品种ZT含量各个时期均显著高于可育品种;雄性不育品种ABA含量各个时期均高于可育品种,后期差异极显著,在雄花序即将脱落时为可育品种的44.1倍。浮来无花雄花序中的IAA/ABA值及GA3/ABA值均极显著或显著低于大红袍,而GA3/IAA值极显著或显著高于大红袍。 相似文献