共查询到20条相似文献,搜索用时 62 毫秒
1.
2.
通过全国不同生态环境多点试验,正确评价参试棉花新品种系的纤维品质及在不同生态条件下纤维品质的差异,为综合评价参试品种和区划种植提供实践依据. 相似文献
3.
4.
5.
6.
7.
国家棉花品种区试纤维品质结果与评价 总被引:1,自引:0,他引:1
农业部棉花品质监督检验测试中心承担了国家棉花品种区试共 7个类型的纤维品质检测与评价工作.通过不同生态环境的多年多点试验,正确评价棉花新品种的纤维品质及在不同生长条件下纤维品质的差异,为品种审定推广、纤维品质区划提供科学依据.试验在温度 20℃± 2℃、相对湿度 65%± 3%条件下进行,检验依据为 ASTM D5867- 95< HVI900大容量纤维测试仪试验方法>,采用 HVICC校准水平. 相似文献
8.
湖北省棉花纤维品质现状分析及品质区划初步探讨 总被引:3,自引:1,他引:2
对湖北省“九五”以来育成的16个棉花品种的纤维品质进行分析,结果表明:湖北省棉花纤维长度较好,比强度偏低,马克隆值偏高。湖北省生产的原棉品质居全国中上等水平,纤维色特征相比较差。在分析湖北省三大棉区的纤维品质特征基础上,提出将鄂东、鄂北、江汉平原棉区分别建成中长绒、中短绒和中绒三种类型原棉生产基地。对如何提高湖北省原棉质量,从改良棉花遗传品质、提高生产品质、实施品质区划等方面进行了讨论。 相似文献
9.
区域试验就是通过田间试验,鉴定新品种的丰产性、抗逆性、适应性、纤维品质、综合表现与对照品种的差异.客观评价参试品种特性与生产利用价值,为国家品种的审定和推广提供科学依据。 相似文献
10.
11.
12.
13.
14.
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
15.
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
16.
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
17.
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
18.
19.
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
20.
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