共查询到20条相似文献,搜索用时 67 毫秒
1.
研究以杂交新品种黑青杨(Populus euramericana"N3016"×Populus ussuriensis)F1代雄性无性系为对象,对其生长、抗性进行了调查,结果表明,在齐齐哈尔地区11年生黑青杨单株平均树高、胸径和材积分别为15.05 m、16.19 cm和0.142 m3,分别超过对照品种小黑杨8.6%、14.8%和37.2%。对主要病害杨灰斑病、锈病、烂皮病、溃疡病及主要蛀干害虫青杨天牛、杨干象、潜叶跳象等抗性较强。该品种树干通直饱满,雄株不飞絮,适合作纸浆材等工业用材林、防护林及绿化树种。 相似文献
2.
文章以白杨派银白杨为母本,以黑杨派N001或青杨派马氏杨单一花粉或其与白杨派树种的混合花粉(混合比例4∶1)为父本,采用人工切枝水培技术进行杂交,并对杂交子代的生根能力进行测定,为更好地提高杂交技术及选育优良品种提供参考。 相似文献
3.
4.
5.
6.
2004年泊头市大面积发生青杨锈病,严重影响杨树的生长。为摸清青杨锈病的危害情况,确定本地适生树种进行了此项调查,结果表明不同杨树品种对青杨锈病的抗病力不同,中林46杨、2025杨等青杨派及其杂交种抗病性极差,而黑杨派及其杂交种如107杨、108杨、廊杨等抗病性较强。白杨派则免疫不感病。 相似文献
7.
天麻为传统中药材.本文从杂交制种、无性栽培、采收等方面全面介绍了长白山区乌天麻与红天麻杂交制种、管理及无性栽培技术. 相似文献
8.
近年来,为解决胶合板行业中芯板占用优质材(曲柳、椴木)的问题,全国许多厂家开始着手研究用青杨代替优质材生产胶合板芯材的研究和实验,并取得不同程度的效果。我厂从1935年下半年开始着手实验工作,经过几年的努力,已初步取得一定的成果,下边谈一下几个具体问题。一、青杨的基本特性青杨为散孔至半散孔材,木材呈乳白色 相似文献
9.
新疆伊犁黑杨派30个品种引种分析 总被引:1,自引:0,他引:1
对新疆伊犁引种的黑杨派30个品种、品系16a的生长量、形态特征、病虫害冻害分析,以健杨作为对照,通过方差分析表明,不同品种间树高和胸径的差异极显著(p<0.01),黑杨派各树种间树高和胸径以及冠幅直径和冠幅高之间呈极显著正相关(p<0.01),胸径和冠幅高间呈显著正相关(p<0.05)。通过分析,适合伊犁的优势品种有中林23、中林28、中林、78-8、78-133。 相似文献
10.
31个杂交杨无性系对青杨叶锈病的抗性评价 总被引:4,自引:0,他引:4
在大田条件下对从北美新引种的31个杂交杨无性系对青杨叶锈病的抗性进行调查和评价的结果表明:所引进无性系对杨树叶锈病的抗性表现出很大的差异,从高度抗病到高度感病均有,但没有免疫的无性系。HE-2,XMH-10,XMH-9,HE-1,XMH-1,XMH-11,XMH-12,XMH-2,MH-8,XMH-7这10个无性系表现出高度抗病性,MH-9,DMH-3,MH-10,MH-4,MH-1,MH-6,MH-7,MH-2这8个无性系表现为高度感病。DN、NE杂交的大多数无性系有较高的抗病性,而TD、TN杂交的绝大多数无性系为感病或高度感病。同一杂交组合的不同无性系间,其抗性存在很大差异,有高抗,也有高感。 相似文献
11.
青杨叶锈病是土默特地区杨树发生的一种重要病害。病原为落叶松-杨栅锈菌。该病菌[0][Ⅰ]阶段专主寄生在落叶松上,[Ⅱ][Ⅲ]阶段寄生在青杨上。该病在土默特地区8~9月开始发病,病害发生比较严重,幼林发病较成林早、重;林内发病较林外重。 相似文献
12.
利用美洲黑杨50号为母本和青杨5个种源(各10个单株)为父本杂交,获得杂种F1代无性系,对此多水平杂交育种体系叶片和生长遗传变异进行了研究.结果表明,父本青杨种源间及种源内单株间均达到极显著差异,F1代无性系的种源间、种源内家系间和家系内无性系间存在不同差异.杂种F1代无性系扦插苗父本种源不同的杂交组合间和组合内家系间成活率差异不显著,1、2、3年生苗的生长性状在不同层次变异水平上差异显著或极显著,表明父本青杨种源间和种源内变异对F1代生长有显著影响,F1代无性系存在丰富的遗传变异,具有选择潜力.杂种F1代叶片形态与苗期生长性状间未发现有较大相关性. 相似文献
13.
利用美洲黑杨 5 0号为母本和青杨 5个种源 (各 10个单株 )为父本杂交 ,获得杂种F1代无性系 ,对此多水平杂交育种体系叶片和生长遗传变异进行了研究。结果表明 ,父本青杨种源间及种源内单株间均达到极显著差异 ,F1代无性系的种源间、种源内家系间和家系内无性系间存在不同差异。杂种F1代无性系扦插苗父本种源不同的杂交组合间和组合内家系间成活率差异不显著 ,1、2、3年生苗的生长性状在不同层次变异水平上差异显著或极显著 ,表明父本青杨种源间和种源内变异对F1代生长有显著影响 ,F1代无性系存在丰富的遗传变异 ,具有选择潜力。杂种F1代叶片形态与苗期生长性状间未发现有较大相关性 相似文献
14.
回顾了林木杂交育种研究的历程,着重介绍,分析了国内,外林木杂交育种研究的情况及趋向。为进一步开展林木杂交育种研究工作提供科学依据。 相似文献
15.
16.
17.
18.
Progress and strategies in cross breeding of poplars in China 总被引:4,自引:0,他引:4
Li Shan-wen Zhang Zhi-yi Luo Jun-min He Cheng-zhong Pu Ying-shan An Xin-min 《中国林学(英文版)》2005,7(3):54-60
The advance in intrasection and intersection cross breeding of poplars in China over the past 50 years is reviewed. Great progress has been made in Sections Leuce and Aigeiros, and satisfactory results of intersection hybridization have been achieved in the crossing between Sections Tacamahaca and Aigeiros. The modes of hybridization include single cross, double cross, triple cross, backcross, etc. It is known that using hybrids as parents to cross with other species or hybrids is an effective and easy way to obtain heterosis. Fast growth, cold and drought tolerance, pest and disease resistance, narrow crowns and rootage, etc. are breeding goals. The conventional artificial crossing is still a major breeding method, and a combination of the conventional artificial crossing with physical radiation and chemical induction can create new triploid individuals that possess higher yield potential. The super clones cultivated have already displayed enormous socioeconomic and ecological benefits in practice. Finally, the problems that investigators have to face at present are discussed as well as some strategies in poplar cross breeding in China. 相似文献
19.
Populus tomentosa was crossed with P. tremuloidis, P. grandidentata, P. alba × P. grandidentata and P. alba × Ulmus pumila in order to maintain its rapid growth and high wood quality and improve its resistance to cold. Two methods were used to
increase the germination rate from 1.5% to 41.1% and the remaining rate from 1.7% to 44.2%. Forty crossing combinations were
conducted and 2 744 hybrid seedlings were obtained. MX4 × P. grandidentata (G-1-58), MX3 × P. tremuloidis (T-44-60), MX2 × P. tremuloidis (1-13-87-37) and MX2 × (P. alba × P. grandidentata) were regarded as superior combinations after analysis and selection. Thirty seedlings of these combinations and 11 triploid
seedlings identified by counting their chromosomes were selected as super plants.
[Supported by the Doctoral Foundation of Ministry of Education (Grant No. 200220022004) and the National “863” Project (Grant
No. 2002AA241071)] 相似文献
20.
Populus tomento a was crossed with P. tremuloidis, P grandiden ata, P. lba × P. grandidentata and P. alba × Ulmus s . ta pumila in order to maintain its rapid growth and high wood quality and improve its resistance to cold. Two methods were used to increase the germination rate from 1.5% to 41.1% and the remaining rate from 1.7% to 44.2%. Forty crossing combinations were conducted and 2 744 hybrid seedlings were obtained. MX. t4 × P grandiden ata (G-1-58), MX3 × P. tremuloidis (T-44-60), MX2 × P. tremuloidis (l-13-87-37) and MX2 × (P. alba × P. grandidentata) were regarded as superior combinations after analysis and selection. Thirty seedlings of these combinations and 11 triploid seedlings identified by counting their chromosomes were selected as super plants. 相似文献