楸树杂交育种初报

来源 :河南林业科技 | 被引量 : 0次 | 上传用户:bell900818
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
楸树自花不育,自然界中的楸树也很少结果,采用人工控制杂交育种,是培育楸树良种的有效途径通过对楸树杂交育种的系统研究,提出了楸树人工控制杂交育种新方法,通过人工杂交及子代测定,筛选出了表现优良的全同胞楸树家系.在此基础上,经超级苗选择,选出了楸树杂种超级苗(单株)29个.
其他文献
目的:为了了解头孢哌酮钠舒巴坦钠联合喹诺酮治疗慢阻肺的66例社区观察,以不断改进慢性阻塞性肺病的临床治疗措施,提高治疗质量,为人民的健康给予保障.方法:将本中心2010年9
The formulas for atomic displacements and Hamiltonian of a thin crystal film in phonon occupation number representation are obtained with the aid of Greens func
The novel bimetallic Sn-In/A12O3 catalysts prepared by three methods for NO reduction by propene were investigated. The results showed that the catalytic activi
Geometries, energies, and vibrational frequencies for two C4N12O4 isomers with pagodane- and isopagodane-like structures have been calculated at the B3LYP/6-31G
目的:探讨改良阴式子宫切除术(TVH)在子宫良性病变的临床应用价值.方法:回顾性分析2011年1月至2012年12本院妇产科46例行改良阴式子宫切除术患者的临床资料.结果:46例患者均
Three new silver alkylenediphosphonates,[Ag2(HO3PCH2CH2CH2CH2PO3H)]1,[Ag4(O3PCH2CH2CH2CH2PO3)]2 and [Ag4(O3PCH2CH2CH2PO3)(H2O)]3,have been hydrothermally synthe
对新疆某一种鸡场的商品代肉雏鸡进行了禽流感母源抗体的跟踪监测.结果显示,2004年4个批次商品代肉雏鸡的禽流感母源抗体持续期随着种鸡免疫后时间的推移呈递减趋势,将同批种
Recent type Ia supernovas data seemingly favor a dark energy model whose equation of state w(z) crosses -1 very recently, which is a much more amazing problem t
13C spin-lattice relaxation times (T1) of a conjugated polymer MEH-PPV in polymer/layered silicate nanocomposites together with the steady state fluorescence em
辣椒疫病是辣椒上的重要病害,由于辣椒疲病病原菌抗药性日益严重,给我国辣椒生产造成极大影响,尤其是在辣椒老产区.该病影响造成减产50-50%,甚至绝产.本文就化学杀菌剂甲霜灵