高原夏菜大白菜新品种引进试验

为鉴定并筛选出适宜高原夏菜生产的优良大白菜品种,实施了安定区高原夏菜大白菜新品种引进试验。引进了6个品种,对不同品种播种后的出苗率、植株长势、抗病性和净菜产量等指标分别进行了比较分析。结果表明:参试品种中金盈(杂交一代)出苗率高、抗病性强、丰产性好,适宜在安定区推广种植。     

高山夏季大白菜新品种比较试验

对引进的5个大白菜品种进行品种比较试验,结果表明,从田间长势、产量、生育期、抗病性、结球紧实度、商品性、口感方面进行分析,‘胶研夏秋王'优于其他参试品种,其次为‘金品夏阳',均可作为高山夏季大白菜推广品种。     

黄芯大白菜品种筛选试验

为了筛选出适合浙江省的黄芯大白菜品种,对引进的几个大白菜品种进行了植物学性状、抗病性、产量等指标的综合考查测评,结果表明,NO730、NO718、NO614植株高大,长势较好,球叶品质与丰产性较好,但NO730与NO614存在发病严重、心叶色泽浅的缺点。相比而言NO718的产量、抗性与品质综合评分居首位。黄佳75在田间生长势中等,抗病性最强,产量高,心叶色泽黄,NO718、黄佳75建议进一步开展示范研究。     

春季大白菜不同播期和育苗方式的栽培试验总结

<正>大白菜容易管理、产量高、市场售价高,深受菜农欢迎,目前已成为鹰潭市月湖区早春蔬菜的主栽品种。但近2年田间调查发现,连续7年使用主栽品种——春晓大白菜出现早抽苔、抗病性差、发病率高的现象。为此,月湖区农林局引进4个春大白菜品种进行试验,以期筛选出最佳推广品种。     

早熟大白菜品种(系)比较试验

为筛选适宜河南地区种植的早熟大白菜品种,选取5个品系进行2年品种比较试验。结果表明,‘郑白65’大白菜生育期63.0 d,熟性最早,软腐病和霜霉病较轻,田间表现抗病毒病,667 m~2净菜产量6 979.50 kg,可于国庆节前上市,经济效益高,是适合河南省大部分地区夏、秋栽培的早熟大白菜品种。新品系‘15t43×11v39’大白菜熟性也较早,对霜霉病和软腐病抗病性强,667 m~2净菜产量5 984.28 kg,有待进一步提纯推广。     

青麻叶直筒合叠抱品种津冠70品比试验

经过组配、试验,选育出了秋播青麻叶直筒合叠抱新型大白菜品种津冠70,以北京三号大白菜品种作为对照,进行了品种比较试验。结果表明,大白菜新品种津冠70较对照农艺性状好,产量高,抗病性强,品质佳,具有很高的推广价值。     

济南地区夏季结球大白菜品种比较试验

为筛选出济南地区夏季适宜种植的结球大白菜品种,以‘夏阳50’为对照,对收集的6个结球大白菜品种从田间性状、产量、抗病性等方面进行比较试验。结果表明,‘德高45’株型紧凑,高温下结球快且紧实,净菜率高,抗病毒病和软腐病,每667 m~2产量达3 418.8 kg,比对照增产32.3%,适合在济南地区夏季推广种植。     

中熟大白菜品种秋栽抗病性比较试验

大白菜是福建省的主要蔬菜品种之一,但霜霉病、软腐病、菌核病等对产量和品质威胁很大,为了筛选出适宜当地晚秋种植的高产、抗病、优质新品种,于2002年秋开始连续两年承担了福建省秋季中晚熟大白菜品种抗病性区域试验,现将试验结果报道如下.     

成都平原地区大白菜品种比较试验

为了筛选出适合成都平原地区栽培的优质、高产夏秋大白菜新品种,在四川成都对10个国内外大白菜品种进行田间比较试验。试验结果表明,千葉、旺春综合评价最高,产量、紧实度、软叶率、净菜率、营养品质、抗病性等指标在所有供试品种中表现最佳,适合在成都平原夏秋季推广栽培;另外京秋56、四季下锅粑可以作为夏季小白菜或快菜推广栽培。     

强冬性大白菜新品种黔白9号的选育

黔白9号是针对贵州省冬春、早春、春夏反季节大白菜生产需要及春夏叶菜淡季市场需求,采用2个强冬性自交不亲和系材料CQ2和ye14-2杂交育成的中晚熟一代杂种。该品种冬性极强,抗寒性、抗病性强,商品性佳。在冬春严寒条件下长势好,产量4 668.4 kg/667 m2,适宜在贵州大白菜产区及类似生态区作晚秋种越冬栽春季上市以及早春栽培春夏上市。     

Advance in adrenomedullin in shock

Adrenomedullin (AM) is a new peptidergic regulator of vascular function. AM serves as a hormone, which has many biological properties, plays an important role in the many pathophysiological processes, especially shock. This review will highlight the structure. bilogical properties of AM and the relationship between AM and shock.     

果实中果胶代谢相关酶基因的研究进展

对果实果胶代谢相关酶基因的研究概况进行综述,总结了参与果胶合成和分解途径的重要酶类编码基因的家族信息、基因功能鉴定、基因表达分析等研究,为果胶代谢分子机制的深入研究及果实品质改良育种提供参考。     

乐都县引进大樱桃效益分析及栽培技术

从气候和区域地理优势角度,对大樱桃在乐都县的发展及栽培优势作出了简单介绍,对栽培大樱桃的效益作出了分析,指出大樱桃在乐都县具有较高的栽培前景,并对大樱桃的栽培技术作了一般性介绍.     

葡萄中糖基化花色苷研究进展

葡萄果实与葡萄酒的颜色由其所含花色苷的种类和含量决定,而花色苷是由花色素经过糖基化修饰转变而成,所以糖基化修饰在葡萄果实花色苷合成途径中起着重要作用。葡萄果实中的糖基化花色苷主要包括花色素的3–O–葡萄糖基和3,5–O–双葡萄糖基,即花色素单糖苷和花色素双糖苷,糖基化花色苷的组成是决定红葡萄酒品质的关键因素之一。对糖基化花色苷在葡萄果实中的组成及其对葡萄酒颜色和稳定性的影响进行了简要介绍,重点对花色素单糖苷和花色素双糖苷合成的关键酶基因以及转录因子进行了综述,以期为葡萄果实糖基化花色苷合成的调控机理的全面揭示和优质红色酿酒葡萄品种的选育提供信息。     

苹果原生质体研究进展——文献综述

综述了近二十年来苹果原生质体研究进展。概述了苹果原生质体分离培养技术及影响分离培养的条件。通过对有关文献的分析，提出了在选用不同的原生质体起始分离材料时应重点解决的问题及今后苹果原生质体研究的方向     

我国食品中农药残留研究进展

随着人们安全健康意识的提高，食品中农药残留问题更加受到重视。为此，对样品预处理研究进展及农药残留快速检测技术研究进展进行综述，并简单介绍各种方法的优缺点。     

设施秋延迟番茄主要农艺性状与产量的相关通径分析

对16个番茄品种的13个农艺性状和产量进行了相关和通径分析。试验结果表明,单株产量和总采果数、株高、叶片数相关性达显著水平,相关系数分别为0.5386,0.6144和0.5182。回归和通径分析结果表明,早期采果数、平均单果质量、果肉厚、株高、总采果数对单株产量直接作用较大,早期采果数通过总采果数、第1穗果数、平均单果质量、株高、茎粗、果肉厚对单株产量间接作用均为负值且较大。     

Seasonal and cultivar differences in salt-induced changes in antioxidant system in tomato

Salt stress has been applied to improve the quality of tomato, but detailed information about the changes in antioxidant systems in salt-stressed fruit is not available. In this study, we examined the effect of salt stress on oxidative parameters, antioxidant content and antioxidant enzymes in two tomato cultivars during two cropping seasons. Salt stress was applied by adding 100 mM NaCl to the nutrient solution. We show that tomato fruits have antioxidant systems to protect themselves from salt-induced oxidative stress. This finding is supported by the lipid peroxidation and hydrogen peroxide levels, which remained unchanged under salt stress conditions. However, these antioxidant systems depend on cultivars and cropping seasons. In the summer crop, the antioxidant systems in salt-stressed ‘House Momotaro’ can be attributed to the enzymatic reactions of ascorbate peroxidase (EC 1.11.1.11) and glutathione reductase (EC 1.6.4.2), while those in salt-stressed ‘Mini Carol’ can be attributed to their non-enzymatic reactions of ascorbate and glutathione. In the winter crop, the antioxidant systems were not influenced by salt stress in either cultivar. However, the proline content increased in both cropping seasons and cultivars. The seasonal and cultivar differences of salt-induced changes in the antioxidant systems may result from cultivar differences in antioxidant capacities and the interaction between salt stress and growth conditions such as temperature and solar radiation.     

我国核桃繁殖技术研究进展

综述了近３０多年来我国核桃繁殖技术研究的主要进展。包括：繁殖方法，砧木资源及其分布利用；嫁接繁殖技术研究（生物学原理、接穗处理、适宜的时期和方法、影响嫁接成活的因素）；现代生物技术繁殖核桃的研究应用与前景展望。     

Differences in vernalisation responses in onion cultivars

Onions normally form bulbs in the first year of growth; however, exposure to low temperatures can induce flowering (vernalisation) before bulbs are produced. Based on the cultivation data of onions grown in Japan, we evaluated and validated a reported model describing the onion vernalisation response. The observed bolting rates of ‘Sapporoki’, which was used in the construction of a previous model, were a good fit to the model, whereas, the bolting rates of one of the overwinter-type cultivars, ‘Momiji No.3?, were lower than the predicted value. The difference between the predicted and observed bolting rates in ‘Momiji No.3? was caused by a larger VD_0.5, the coefficient in vernalisation response models that represents the time point when half of the plants have bolted. Overwinter-type and/or bolting resistant cultivars can have parameters that indicate a further vernalisation requirement for bolting. The parameters in our model can be customised to the cultivar being investigated, and our study suggests the viability of modelling onion bolting by using air temperature.