共查询到20条相似文献,搜索用时 78 毫秒
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根据河南省主要农作物品种审定委员会及相关专家对2020年秋作物生产、新品种试验和展示示范考察情况,结合各地市统计结果,对2020年河南省秋季作物生产情况与特点、品种利用以及布局意见进行分析,为2021年秋季作物品种利用选择提供指导和参考. 相似文献
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河南省种子管理站于2009年9月中下旬组织“三农”专家到全省部分市、县的主要农作物种子基地、中间试验点、示范展示点和引种试验点对秋作物主要品种进行田间考察,根据品种的田间表现、产量预测和各省辖市种子管理部门的考察总结,我们对2009年秋作物主要品种做出评价,并提出下年度品种初步布局利用意见。 相似文献
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为做好全市秋作物品种考察工作,了解2019年南阳市秋作物生产形势和品种利用情况,为科学评价品种及品种合理布局利用提供依据,南阳市种子管理站于2019年8月28日-9月29日对全市秋作物进行了全面考察。 相似文献
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2003年我省秋作物生长期间,气候十分异常,降雨量较往年多1~2倍,8~9月份长期阴雨连绵、低温寡照,对秋作物生长极为不利。为掌握特殊气候条件下各种秋作物品种在大田生产中的表现,科学筛选及鉴定优良品种,为2004年各地利用品种提供参考和依据,河南省种子管理站于2003年9月下旬组织省农业厅、农科院、农业大学的专家,对全省部分市、县的玉米、水稻、棉花、大豆、花生等主要农作物品种的大田、品种试验田进行了考察,之后又参考各市种子管理部门的品种考察报告,对全省秋作物品种利用情况进行了汇总。 相似文献
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中国牧草育种工作研究进展 总被引:4,自引:0,他引:4
在综述中国牧草育种工作进展的同时,分析了牧草育种工作中存在的问题,主要包括育成的牧草品种少,良种推广和覆盖面积较小以及牧草育种理论基础薄弱等,并针对性地提出应从改进牧草育种的方法和途径、培育具有地方特色的独特牧草品种、加强种质资源的保护与利用、加快良种向现实生产力的转化以及通过各部门协作攻关等方面解决这些问题。 相似文献
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中国稻草还田技术研究进展 总被引:5,自引:2,他引:3
随着中国农业的发展,大量稻草被焚烧或者弃置,这不仅浪费了养分资源还造成环境污染。本文综述了稻草还田的方式方法,稻草还田对土壤性状及水稻产量的影响以及稻草还田对水稻氮素吸收和氮肥利用率的影响,以期待稻草还田技术可以进一步推广应用。 相似文献
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兰花试管开花研究进展 总被引:3,自引:1,他引:2
对兰花试管开花方面的研究进行了综述,着重介绍了兰科植物试管开花的影响因素及其调控和分子机理等方面的研究情况,指出目前存在的若干问题并提出解决对策。 相似文献
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Twenty two Uromyces appendiculatus isolates were tested on 20 differential and 25 Ecuadorian Phaseolus vulgaris cultivars in the seedling stage. Based on the infection types 20 races could be discerned. The Ecuadorian cultivars differed
greatly in their reaction to the isolates, from resistant to only one isolate (`Red Small Garden') to resistant to all isolates
(’G2333‘). The isolates showed a wide range of virulence to the Ecuadorian cultivars, from virulent to only two cultivars
(isolate 13) to virulent to 21 cultivars (isolates 5 and 23).
Seven cultivars with a basically susceptible infection type appeared to differ greatly in quantitative resistance when tested
in three consecutive crop cycles. The disease severities in percentage leaf area affected averaged over the three cycles ranged
between 83.9% for ‘Red Small Garden’ and 13.1% for ‘INIAP-414’.
Race-specific resistance does not seem an advisable breeding strategy, but the quantitative resistance offers a good alternative. 相似文献
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低温胁迫是限制植物生长发育和地理分布最主要的环境因子之一,影响植物细胞膜系统、抗氧化系统、光合作用、次生代谢等诸多方面,对农业生产和发展有严重影响。因此,揭示作物在冷胁迫下的生理及分子机制是十分必要的,这有助于培育耐寒作物品种,从而减少生产损失,扩大作物种植面积,具有重要的生产价值和经济效益。目前,基于RNA-seq技术进行植物低温胁迫分子机制深度解析在拟南芥、水稻、油菜、茶树、小麦、烟草、高粱等重要作物上得到了发展应用。本研究综述了近年来植物在低温胁迫或低温适应过程中的转录组学研究现状,以期为高通量测序技术在植物抗性研究方面提供方法借鉴和理论基础。 相似文献
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Toshihiro Saito 《Breeding Science》2016,66(1):46-59
The Japanese pear (Pyrus pyrifolia Nakai) is one of the most widely grown fruit trees in Japan, and it has been used throughout Japan’s history. The commercial production of pears increased rapidly with the successive discoveries of the chance seedling cultivars ‘Chojuro’ and ‘Nijisseiki’ around 1890, and the development of new cultivars has continued since 1915. The late-maturing, leading cultivars ‘Niitaka’ and ‘Shinko’ were released during the initial breeding stage. Furthermore, systematic breeding by the Horticultural Research Station (currently, NARO Institute of Fruit Tree Science, National Agriculture and Food Research Organization (NIFTS)) began in 1935, which mainly aimed to improve fruit quality by focusing on flesh texture and black spot disease resistance. To date, 22 cultivars have been released, including ‘Kosui’, ‘Hosui’, and ‘Akizuki’, which are current leading cultivars from the breeding program. Four induced mutant cultivars induced by gamma irradiation, which exhibit some resistance to black spot disease, were released from the Institute of Radiation Breeding. Among these cultivars, ‘Gold Nijisseiki’ has become a leading cultivar. Moreover, ‘Nansui’ from the Nagano prefectural institute breeding program was released, and it has also become a leading cultivar. Current breeding objectives at NIFTS mainly combine superior fruit quality with traits related to labor and cost reduction, multiple disease resistance, or self-compatibility. Regarding future breeding, marker-assisted selection for each trait, QTL analyses, genome-wide association studies, and genomic selection analyses are currently in progress. 相似文献