共查询到20条相似文献,搜索用时 313 毫秒
1.
用单因素多重比较DDCBJ模型对大梅核与大马铃在石灰岩母质上,大梅核与细梅核在岗岩母质上,大佛指银杏,中椭圆及中长子银杏在板页岩上的经济性状作了作了差异显著检验,检验结果:(1)各品种(类型)间其含水率,Vc含量,蛋白质含量,还原糖含量,总糖含量,淀粉含量,单果重等经济性状差异达到显著水平。(2)中椭圆子和中长子银杏在板页岩上的核率达到了差异显著性水平。(3)同一品种群的不同品种(类型)间或不同品 相似文献
2.
3.
对大佛手银杏秘大梅核银杏经济性状与土壤条件的相关性作了研究,不同土壤因子对银杏经济性状有不同方式,不同程度的影响,但没有达到显著水平,同一土壤因子对这两个银杏品种经济性状的影响不一定相同;影响两品种同一经济性状的土壤因子也不一定相同。生产上应找出影响呼品种(类型)经济性状的主要因子。 相似文献
4.
银杏种核形状及其种仁成分的分析研究(英文) 总被引:2,自引:0,他引:2
根据银杏种核的形状将银杏雌株品种分为长子、佛指、马铃、梅核和圆子5 种类型.测定分析结果表明,不同品种类型间的种核三维度,即长/ 宽、长/ 厚、宽/ 厚比具显著或极显著差异,其株间变异较小,种仁中氢氰酸含量与种核的宽/ 厚比呈极显著正相关;而不同品种类型间的单核重及种仁中与品质密切相关的干物质、支链淀粉、直链淀粉、淀粉、粗蛋白及可溶性糖含量差异不显著,但其株间变异较大,最大变异系数达到2479 % . 相似文献
5.
中国银杏的种核类型及其特征 总被引:18,自引:0,他引:18
银杏种内变异较大。 2 0世纪 5 0年代起 ,通过广泛调查、收集我国银杏的核用品种资源 ,对种实不同发育时期的组织结构及形态特征进行了解剖观察。主要根据种实的珠托、种核的形状、长、宽、厚及种核两侧、顶端的特征 ,将银杏种核分为长子、佛指、马铃、梅核、圆子 5种类型 ,并确定了隶属于各个类型的主要栽培品种。通过对每一类型的种核重、核形指数及种仁中干物质、直链淀粉、支链淀粉、淀粉、粗蛋白、可溶性糖、氢氰酸含量的分析 ,对种核品质作了鉴评 ,为银杏核用品种资源的利用和改良提供了依据。 相似文献
6.
郯城县银杏栽培品种发展历史很久,大致可划分为自发选育,试验推广和发展提高3个阶段。该县的银杏可划分为长子、佛指、马铃、圆子4大类群;品种丰富,作者重点介绍了早实、丰产、粒大、质优的6个良品种(品系)。文末对银杏品种的研究方向问题提出了建议。 相似文献
7.
8.
不同品种银杏种子成分分析 总被引:1,自引:0,他引:1
1材料与方法实验材料为1995年10月采于洛阳的4个品种的银杏种子。将生理成熟调制后的银杏种子室温下风干,去掉外种皮后,进行各项测定。总糖测定用费林试剂热滴定法;淀粉和还原糖测定用索姆基法;总氮测定用克氏定氮法;脂肪测定用索氏抽提法;胡萝卜素和核黄素和总黄酮的测定用庄向平法;银杏内酯测定用Pitta法;矿质元素测定用毕守法法;白果酸和白果酚测定用游松法。2结果与分析2.卫平同品种银杏种子碳水化合物、脂肪和蛋白质的含量不同品种银杏种子的水分、脂肪、蛋白质、总糖、淀粉和还原糖的测定结果(表1)表明,品种不同,种子… 相似文献
9.
《中国林副特产》2016,(6)
为进一步了解传统品种优1、龙王帽在本地区果实经济性状的表现,及与新选育出的品种中仁一号与新优选的品系B5的果实经济性状差异,为育种亲本的选择提供科学依据。对韩城乡陡沟村试验园内4个仁用杏品种(系)的8项果实经济性状指标进行调查,利用主成份分析法分析。结果表明:供试的4个仁用杏品种(系)中,中仁一号产仁指标最大,但核重指标偏小;B5是产仁指标与核重指标都较小的品种,但B5的核壳厚度只有0.9mm;优1的产仁指标与核重指标都中等偏上;龙王帽的核重指标大,但是产仁指标偏小。结论:中仁一号可以做丰产性强的品种,B5可以作为薄壳品系,优1可推荐综合性状较好的品种,龙王帽可作为产大核品种推荐。 相似文献
10.
开展不同种源银杏同质园试验,揭示环境对不同种源银杏的影响,为选育药用价值高的银杏种源和品种提供依据。收集了川内4个不同种源的银杏种子,经同质园栽培后,对其幼苗生长和叶片药用成分含量进行测定分析,并对各测定结果进行相关性分析。结果显示:(1)各种源间种子横径、纵径和百粒重均极显著差异(P<0.01),且均开江最大;(2)各种源间苗高、单株叶数、单叶重和单株叶重均极显著差异(P<0.01),冠幅显著差异(P=0.02)。其中苗高、单株叶数、单株叶重、冠幅均开江最大,单叶重泸定最大;(3)各种源间叶片萜类内酯、白果内酯含量呈极显著差异(P<0.01),黄酮、银杏内酯A和银杏内酯B含量均显著差异(P=0.02,P=0.03,P=0.01)。其中黄酮含量苍溪最高,萜类内酯、白果内酯、银杏内酯A、银杏内酯B含量均泸定最高;(4)苗高与单株叶重呈极显著正相关(r=0.912);萜类内酯与白果内酯和银杏内酯B含量(r=0.928和0.962)均呈极显著正相关。不同种源的银杏同质园栽培结果表明,由于亲代长期受种源地环境的影响,子代幼苗的生长以及药用成分含量具有显著差异。 相似文献
11.
12.
研究表明:杉木种子性状间、发芽率与优良度、发芽率与发芽势为极显著相关,而优良度与千粒重为显著相关;千粒重与苗期、幼林的生长性状间的线性相关不显著;同一家系年重复与千粒重之间虽显著线性相关,其它性状相关则不显著;同一家系同年份,苗高、侧枝数有较高的空间重复性,而地径、顶芽数空间的重复性较差;相同家系,树高、胸径和材积生长在不同的地点表现出不同程度的相关系数。树高与胸径生长的相关系数γ值为0.6—0.7;相同家系在不同年份重复中,胸径生长相关显著。 相似文献
13.
14.
本文对广元市9个核桃良种的生长表现及坚果经济性状进行了分析。结果表明:(1)广元现有良种具有生长势中等偏强,具备丰产、稳产特性。同时,本地核桃品种多样性丰富,在特色品种开发方面,仍然有较大空间。(2)广元现有良种果形端正,果壳厚薄适中,坚果内褶壁基本退化,隔膜膜质,稀有革质,多数取仁易,出仁率高。在以后的品种推广中,应大力发展蜀朝2号、青川1号、旺核1号等品种果型大、出仁率高、耐储运的良种。(3)根据变异分析得出,三径均值、粗脂肪含量、出仁率变异系数较低,说明这些指标的遗传稳定性较高。(4)单果重、三径、壳厚、出仁率、粗脂肪含量、粗蛋白含量两两之间存在一定的相关性。这些相关性结果对于研究区域内核桃性状变异、性状指标间变化规律具有一定的指导意义。 相似文献
15.
As part of a wider study characterizing tree-to-tree variation in fruit traits as a pre-requisite for cultivar development,
fruits were collected from each of 63 marula (Sclerocarya birrea) trees in Bushbuckridge, South Africa and from 55 trees from
the North Central Region of Namibia. The nuts were removed from the fruit flesh, and the kernels extracted, counted and weighed
individually to determine the patterns of dry matter partitioning among the nut components (shell and kernel) of different
trees. Mean nut, shell and kernel mass were not significantly different between the two countries. Between sites in South
Africa there were highly significant differences in mean nut mass, shell mass, kernel mass and kernel number. In Namibia,
there were highly significant differences between geographic areas in mean shell mass, kernel mass and kernel number, but
not in nut mass. These differences had considerable impacts on shell:kernel ratios (8.0 - 15.4). In South Africa, mean kernel
mass was significantly greater in fruits from farmers fields (0.42 g) than from communal land (0.30 g) or natural woodland
(0.32 g). Within all sites, in both South Africa and Namibia, there was highly significant and continuous variation between
individual trees in nut mass (South Africa = 2.3 - 7.1 g; Namibia = 2.7 - 6.4 g) and kernel mass (South Africa = 0.09 - 0.55
g; Namibia = 0.01 - 0.92 g). The small and valuable kernels constitute a small part of the nut (Namibia = 6.1- 11.1%; South
Africa = 7.6 - 10.7%). There can be 4 kernels per nut, but even within the fruits of the same tree, kernel number can vary
between 0-4, suggesting variation in pollination success, in addition to genetic variation. The nuts and kernels of the Namibian
trees were compared with the fruits from one superior tree (Namibian Wonder: nuts = 10.9 g; kernels = 1.1 g). Oil content
(%) and oil yield (g/fruit) also differed significantly between trees (44.7 - 72.3% and 8.0 - 53.0 g/fruit). The percentage
frequency distribution of kernel mass was skewed from trees in farmers fields in South Africa and in some sites in Namibia,
suggesting a level of anthropogenic selection. It is concluded that there is great potential for the development of cultivars
for kernel traits, but there is also a need to determine how to increase the proportion of nuts with four kernels, perhaps
through improved pollination success. 相似文献
16.
17.
18.
Black walnut (Juglans nigra) is a prime tree species for agroforestry practices in the United States providing highly prized wood and nuts for human
consumption and wildlife. In 54 black walnut stands in south central United States, the site index (i.e., mean dominant height
[DH], at age 25 years) ranged between 5.2 and 21.4 m, and was independent of stand density. There were no differences in height
and stem diameter (DBH) growth rates between stands with improved varieties and native stock. Most stands were in a “free
growth” stage because of either early age or wide spacing. Mean annual increments in DBH and height were positively related
both for improved varieties and native stock. Understory competition had a substantial detrimental effect on DH. In a 26 year-old
stand, trees growing within Kentucky blue grass (Poa pratensis) had a site index 5 m greater than trees growing within tall fescue (Festuca arundinacea). Predicted nut yields in 2002 varied between 0 and 1370 kg of hulled nuts per ha. Improved varieties had, in general, higher
nut yields than predicted from a nut yield-DBH equation developed for individual trees. Nut yields were highly variable both
within and among stands, and were related to DBH in native stock but not in improved varieties. 相似文献
19.
20.
燕山板栗营养品质的模糊综合评价 总被引:4,自引:1,他引:3
为了给华北地区选育优良板栗品种提供理论依据,采用模糊综合评价方法对燕山和山东板栗的营养品质进行了测评,结果表明:被测评的各品种板栗的单粒质量、蛋白质含量、维生素C含量、可溶性糖含量、淀粉含量、糊化温度的差异极显著;其支链淀粉含量、直链淀粉含量和还原性糖含量的差异不显著。通过建立各指标的线性隶属函数,根据最大隶属原则进行品质排序,确定出燕山短枝、短雄、垂枝栗1号、燕昌、遵达栗等品种为优质品种;同时发现,糊化温度和板栗品质的排名呈现极显著正相关关系。 相似文献