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从三个方面综述了当前马铃薯抗“低温糖化”种质资源的研究和利用情况：一、引种和种质资源评定是加工品种选育的首要工作。二、杂交育种是获得抗“低温糖化”炸片加工型品种的主要方法。三、通过基因工程丰富马铃薯抗“低温糖化”的基因资源。 相似文献
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本文回顾了马铃薯种质资源研究利用的历史，简述了马铃薯种质资源收集、保存、鉴定、评价、利用与创新工作所取得的成就，提出了今后我国马铃薯种质资源的研究方向。 相似文献
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近年来,受气候因素、农民的耕作方法及农业经营方式变化,特别是城镇化、工业化快速发展的影响,大量地方品种迅速消失,作物野生近缘植物资源因其赖以生存繁衍的栖息地遭受破坏而急剧减少.全面普查农作物种质资源,抢救性收集和保护珍稀、濒危作物野生种质资源和特色地方品种,对保护农作物种质资源的多样性、农业可持续发展的生态资源环境具有重要意义. 相似文献
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我国蔬菜种质资源研究进展与发展策略 总被引：1，自引：0，他引：1
对我国近五十年蔬菜种质资源的收集、保存、创新和利用等方面的主要研究成果进行了综述，重点介绍了十年来在蔬菜种质资源的保护和高效率、安全、低能耗保存技术，种质资源鉴定评价和核心种质研究，优异基因源的挖掘、种质创新和利用等方面取得的显著成就。针对蔬菜种质资源研究面临的挑战和存在的问题，提出了我国蔬菜种质资源的发展策略。 相似文献
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通过调查了解湖北省枝江市柑橘产业发展的基本情况,如种植面积及分布、柑橘品种及数量、产量及经济效益等,分析了枝江市柑橘产业在发展过程中遇到的问题,如柑橘品种急需改良、基础设施欠缺、缺乏科学技术等,提出了枝江柑橘产业的发展建议,以促进枝江市柑橘产业的快速健康发展。 相似文献
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贺兰山东麓地区葡萄酒旅游产业创新发展路径研究 总被引：1，自引：0，他引：1
发展葡萄酒旅游是顺应我国消费需求升级,宁夏探索新经济、培育新发展动能的重要举措。通过梳理贺兰山葡萄酒旅游产业的发展现状、存在主要问题,并针对问题提出创新发展的对策,主要包括深化体制机制改革,盘活葡萄酒旅游资源;促进产业融合,拓宽葡萄酒旅游产品体系;依托科技和文化手段,提高葡萄酒旅游产品吸引力;优化空间布局,实施差异化发展;加强葡萄酒旅游品牌管理和营销,提升品牌价值;深耕国际和大众葡萄酒旅游市场,做大市场规模;加快葡萄酒产区旅游基础设施建设,完善旅游配套服务。 相似文献
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‘Perlita’ muskmelon fruit (Cucumis melo L.) grown under both field and greenhouse conditions were sampled at 10-day intervals for 50 days after pollination to determine changes in pH, soluble sugars, total protein, β-carotene, tissue firmness, cell wall composition, cell wall degrading enzymes, total calcium and bound calcium. The sucrose content of fruits increased substantially after 40 days post-anthesis, which compensated for the significant decreases in glucose and fructose content. Acidity and total protein remained relatively unchanged throughout the sampling period. β-carotene increased from 0.3% (w/w) at 10 days post-pollination to 2.7% (w/w) in 50-day old melons. Tissue firmness measured by shear force decreased by 400% between 30 and 50 days postanthesis. No significant changes in cellulose, hemicellulose and pectin content of the cell wall were detected. Cx-cellulase and pectinmethylesterase activity were detected but remained constant or declined during ripening; polygalacturonase activity was not detected. The major compositional changes in developing and ripening fruit were sucrose, glucose, fructose and β-carotene. In spite of dramatic decreases in tissue firmness, concomitant changes in crude cell wall fractions and associated cell wall degrading enzymes were not detected. 相似文献
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为推动"彭阳辣椒"产业高质量、可持续发展,立足"彭阳辣椒"发展的历史底蕴深厚、技术体系相对成熟、流通体系比较完善等现状,聚焦"彭阳辣椒"生产面积萎缩、连作障碍严重、内生动力不足等问题和短板,结合实际提出了优化升级设施建设标准、发展露地辣椒种植、全面提高科技水平、深化到户经营、构建产品大流通的格局等举措,对推动辣椒产业健康可持续发展具有现实的指导意义。 相似文献
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Oleg Daugovish Ben Faber Michael Cahn Surendra Dara 《International Journal of Fruit Science》2016,16(4):108-117
ABSTRACTStrawberry transplants in California are planted through narrow holes in raised beds covered with polyethylene mulch. They are irrigated with overhead sprinklers for the first five weeks to leach salts and maintain plant turgidity; most of this sprinkler-applied water runs off the plastic without reaching the plants. At three coastal locations, we compared grower controlled drip irrigation with doubled number of tapes to sprinkler irrigation immediately after planting. Root zone EC and moisture levels were similar in both irrigation systems. Depending on the location, water use was reduced 24 to 78% in drip-only plots compared to sprinkler and runoff was nearly eliminated. Plants in drip-only plots were similar in size and root biomass to those established with sprinkler irrigation. Early yields were similar in the two irrigation systems. Thus, use of the increased number of drip tapes conserves water during strawberry establishment without negative effects on plant performance. 相似文献
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The effect of mean daily air temperature (MDT) on flowering rate (the reciprocal of days to flower) was quantified for 18 species of annual bedding plants. Plants were grown in environmental growth chambers at constant air temperature set points of 5, 7.5, 10, 15, 25, or 30 °C and under an irradiance of 160–180 μmol m–2 s–1, with a 16-h photoperiod. Nonlinear mathematical equations were developed to predict the effect of MDT on flowering rate and to estimate the base, optimum, and maximum temperatures (Tmin, Topt, and Tmax), which are the temperatures at which flowering rates are zero (low temperature), maximal, and zero once again (high temperature), respectively. The estimated Tmin varied among species and ranged from 1.1 °C in French marigold (Tagetes patula L.) to 9.9 °C in angelonia (Angelonia angustifolia Benth.). Topt and Tmax were only observed for 8–10 species with the temperature range tested. Topt ranged from 19.1 °C in dahlia (Dahlia × hybrida Cav.) to 28.0 °C in blue salvia (Salvia farinacea Benth.), whereas Tmax ranged from 30.3 °C in snapdragon (Antirrhinum majus L.) to 31.7 °C in moss rose (Portulaca grandiflora Hook.). Angelonia, browallia (Browallia speciosa Hook.), cosmos (Cosmos sulphureus Cav.), dahlia, and snapdragon grown at 25 or 30 °C developed a mean of two to seven more nodes before flowering compared with plants grown at ≤15 °C. The results indicate that in many species, flowering rate in response to MDT is asymmetrical around Topt and the temperature range between Tmin and Topt is wider than that between Topt and Tmax. This information could be used to improve the predictability of flowering time of these ornamental crops and to assist growers in determining energy-efficient production temperatures. 相似文献
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In grapes, seedlessness is an important quality attribute for fresh consumption. There are seedless cultivars but their berries are often very small. A cane-scoring technique proved effective in increasing average berry size of ‘Emperatriz’ seedless grape by 16% in a 4-year experiment, and increased bunch weight by 8.2–28.6%, compared with unscored bunches, depending on the year, but had no effect in ‘Aledo’ seeded grape. This effect was due to: (1) a significantly higher daily berry growth rate in scored vines at 30–50 d after scoring; (2) an advance in time of accumulation of reducing sugars, particularly glucose; (3) a reduction of berry water potential of seedless ‘Emperatriz’ of similar values to those of seeded ‘Aledo’. Cane scoring showed no negative effect on the number of harvested bunches per vine the year following the scoring year, both in ‘Emperatriz’ and ‘Aledo’ cultivars. 相似文献
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不同营养液水培对含羞草生长发育的影响 总被引：2，自引：0，他引：2
采用水培方法,以清水培养为对照,研究了不同营养液配方对含羞草(Mimosa pudica)生长发育的影响。结果表明,含有0.9446 g·L-1Ca(NO3)2.4H2O、0.8088g·L-1KNO3、0.1495g·L-1NH4H2PO4和0.4929 g·L-1 MgSO4·7H2O的营养液(配方B)所处理植株的各项形态指标均明显优于其它配方,叶绿素含量和过氧化氢酶活性也高于其它配方。而丙二醛(MDA)的含量与其它配方相比差异不显著。 相似文献