A genealogical database for plant propagation records     

P. A. Clarke  B. Casiero 《Euphytica》1979,28(3):785-792

Summary A CODASYL type database has been created for plant propagation records. The existence and history of plants can be recorded in such a way that details of parentage and offspring can be traced. Plants that have undergone similar treatments and events or that have similar characteristics can be located and other information assisting the management of the propagation experiments is recorded. Containing this information, the database is a model of experimental plant propagation.  相似文献   

Pistillate-parental differences and the ability to produce interspecific hybrids between Lycopersicon esculentum and 'peruvianum-complex' species (L. peruvianum and L. chilense)     

H. Egashira    R. Ogawa    H. Kanno    T. Tanisaka  S. Imanishi 《Plant Breeding》1999,118(3):253-258

To overcome the cross-breeding barriers between the cultivated tomato Lycopersicon esculentum and the ‘peruvianum-complex’, hybrid production ability (HPA) and pistillate-parental differences were investigated. As a criterion of HPA, the number of germinated ovules per fruit (GPF) was used. GPF was expressed as GPF = OPF × GPO, where OPF is the number of ovules per fruit, and GPO is the proportion of germinated ovules to total ovules obtained. The interspecific crossing between nine varieties and three ‘peruvianum-complex’ accessions revealed that the cultivars ‘Sekaiichi’,‘Ponde Rooza’ and ‘Early Pink’ showed quite high and stable GPF over the years, but the cv.‘Best of All’ produced no hybrids. Variance analysis for GPF, OPF and GPO, and their correlation with seven sexual organ morphological traits and three fruit morphological traits were performed. These results indicated that choosing both the pistillate parents with wider reproductive organs for high OPF and appropriate environmental conditions for high GPO might be significant for enhancing GPF in interspecific crossing.  相似文献   

Dry matter accumulation and partitioning in cotton (<Emphasis Type="Italic">Gossypium hirsutum</Emphasis> L.) as influenced by potassium fertilization     

M. I. Makhdum  H. Pervez  M. Ashraf 《Biology and Fertility of Soils》2007,43(3):295-301

The effect of potassium (K) supply on dry matter accumulation and partitioning of biomass between different among parts of cotton (Gossypium hirsutum L.) was determined under irrigated conditions. The treatments were four cotton cultivars (CIM-448, CIM-1100, Karishma, and S-12), four K rates (0, 62.5, 125, and 250 kg K ha⁻¹), and two K-fertilizer sources (K₂SO₄, KCl). Sequential harvests were collected at four stages of growth, viz first flower, peak flowering, first boll split, and maturity. The dry weights (DW) of vegetative and reproductive organs were determined. Maximum total DW was obtained at 125 days after planting, and then it declined because of leaf senescence at maturity. Cultivars differed significantly among themselves in the production of total DW and its partitioning between different organs. The addition of K fertilizer increased DW substantially at various stages of growth. Potassium fertilizer stimulated cotton plant to translocate resources towards reproductive organs rather than vegetative organs. Crop receiving 250 kg K ha⁻¹ allocated 77% more dry matter into reproductive organs. The K-sources produced a little effect on the allocation of DW in various parts of the plant. Maximum reproductive–vegetative ratio (RVR) was maintained by cv CIM-448 and minimum in cv CIM-1100. Data showed that a shift in DW allocation into reproductive organs was dependent upon sustained supply of K⁺ throughout the season. There were positive significant correlations (0.86, 0.71, and 0.90) between seed cotton yield and total DW, vegetative DW, and reproductive DW, respectively.  相似文献   

干旱对玉米穗发育及产量的影响   总被引：6，自引：2，他引：6  

李叶蓓  陶洪斌  王若男  张萍  吴春江  雷鸣  张巽  王璞 《中国生态农业学报》2015,23(4):383-391

干旱作为影响玉米产量的环境因素之首,对玉米植株形态、物质积累、生理作用、性器官发育等方面产生影响,最终降低穗粒数、粒重,导致产量降低。以雌雄穗发育为研究重点,本文综述了不同时期干旱对雌雄穗性状及开花吐丝间隔期的影响。玉米开花前遭遇干旱,延缓雌雄穗发育进程,减少分化小花数,增加籽粒败育,导致穗粒数降低;抽雄吐丝期间遭遇干旱,导致雄穗抽出困难、吐丝延迟,使开花吐丝间隔期拉长,严重时导致花粉、花丝超微结构发生改变,影响玉米授粉、受精过程,最终导致秃尖形成,穗粒数降低;灌浆期遭遇干旱导致叶片早衰,光合产物积累不足,籽粒灌浆受阻,粒重降低,最终均会导致产量下降。从源库关系角度分析,玉米灌浆期前干旱导致玉米产量降低的主要原因是穗粒数降低导致的库强不足;而灌浆期干旱主要是叶片早衰等营养器官发育受阻,限制同化物的积累及转运,此时源不足限制了产量的增加。  相似文献   

地被植物在园林中的配置探讨——以石家庄市城市绿地地被植物应用为例     

田利颖 《农业科技与信息》2007,(12)

选择出阳性及半阴性地被30种、阴生地被15种,提出四项地被植物应用设计原则和配置手法。对地被植物应用主要配置方式进行调查,按不同地域地被植物配置,分为空旷地、道路绿地、林缘疏林、林下、草坪、山体坡地、树池、和湿地八种应用形式。通过实例分析认为,地被植物景观配置必须了解其生态习性,选择与其生物学特性相适生的外界条件,并保证其必要的养护,以最大限度发挥其生态、景观效益。  相似文献   

火鸡2次免疫后的免疫应答     

高荣  刘忠贵  张克录  杨振英  周瑞进 《东北农业大学学报》1993,(3)

实验研究了 Lasota 疫苗2次免疫火鸡后,其中枢和外周免疫器官及消化道和呼吸道局部免疫组织中免疫细胞的动态变化。结果表明。2次免疫后,火鸡法氏囊,脾脏、盲肠扁桃体、哈德尔腺和支气管粘膜的浆细胞和淋巴细胞显著增多;胸腺、脾脏、法氏囊与盲肠扁桃体的酯酶阳性 T 细胞数明显升高,巨噬细胞程度不同地增加。ND 强毒攻击后,2次免疫火鸡免疫器官、组织的细胞免疫和体液免疫反应进一步增强,全部免疫火鸡获得免疫保护。对照火鸡则呈现全身和局部细胞免疫及体液免疫机能衰竭,全部发病死亡。  相似文献   

濒危植物夏蜡梅总皂甙含量及其环境因子相关性研究   总被引：4，自引：0，他引：4  

李钧敏  金则新  朱小燕 《西北林学院学报》2006,21(5):147-150

对不同样地、不同海拔高度夏蜡梅营养器官的总皂甙含量进行测定,并分析了与环境因子之间的相关性。结果表明:(1)夏蜡梅不同营养器官的总皂甙含量以叶片最高,1年生枝、根次之,2年生枝、茎最低。叶片的总皂甙含量与其他器官差异均极显著。根的总皂甙含量与海拔高度呈显著的负相关,其他器官与海拔高度相关不显著。(2)阴坡的1年生枝、根的总皂甙含量比阳坡高,差异极显著;其余器官在阴、阳坡之间的含量差异不显著。(3)夏蜡梅7个居群叶片总皂甙含量在0.295 9%~0.415 5%之间,平均为0.340 0%。(4)通径分析显示,土壤P含量对夏蜡梅叶片总皂甙含量起负相关作用,土壤N含量起正相关作用,有机质、土壤pH值、海拔高度也起正相关作用。  相似文献   

六盘山区伏毛铁棒锤生态适应特征研究     

王丽  曾洪学  屈兴红  王俊  曾洪云 《安徽农业科学》2007,35(19):5992-5994

对六盘山区伏毛铁棒锤营养器官的形态、解剖结构进行了观察和分析。结果表明,为适应六盘山区典型的草原半湿润半干旱气候及特定的生态环境,伏毛铁棒锤具备了显著的旱生结构特征。  相似文献   

多胺与园艺植物生长发育的关系   总被引：7，自引：0，他引：7  

崔凤芝  张运涛 《河北农业大学学报》1996,19(3):94-98

就多胺对园艺植物的花芽分化、花粉形成、果实发育、根系形成及营养生长的作用进行了综合评述，并就多胺与植物衰老的关系进行了分析。  相似文献   

杜仲不同器官含胶率的差异及其相关性分析   总被引：2，自引：0，他引：2  

杜红岩杜兰英  傅建敏杜西山 张小志 《中南林学院学报》2006,26(4):1-4

为了确定杜仲高产胶优良无性系选择的指标，采用选择典型样株和随机取样的方法对杜仲果实、树皮和叶片内含胶率进行全面分析比较．研究结果表明：不同产地、不同变异类型以及不同无性系的各器官杜仲胶含量由高到低的顺序均为果实〉树皮〉叶片；不同变异类型果实含胶率是叶片含胶率的4．34～4．89倍；不同产地果实含胶率是叶片含胶率的3．79～5．47倍；不同无性系果实含胶率是叶片含胶率的2．98～6．75倍；杜仲果实内杜仲胶的开发利用潜力远远大于杜仲叶,果园化栽培是今后杜仲综合利用的主导栽培模式，利用杜仲果实提取杜仲胶是今后杜仲胶产业化发展的最主要途径之一，也是今后杜仲培育技术重点研究的技术领域．  相似文献