摘要
采取室内切枝水培杂交法开展了以美洲黑杨Populus deltoides69号和57号为母本,青杨P.cathayana,川杨P.szechuanica和卜氏杨P.purdomii为父本的杨树派间人工杂交及杂种苗生长和抗病性状测定研究。结果表明:5个杂交组合坐果率、种子发芽率最高可达55%和20%,最低仅为20%和5%,可配性差异较大;5个杂交组合杂种苗生长存在极显著性水平差异;69号×川杨、69号×卜氏杨2个杂交组合杂种苗在苗高、地径生长方面表现最好,其平均苗高分别为2.87和2.38m,平均地径分别为2.57和2.13cm,且均与以57号为母本的2个杂交组合的杂种苗生长存在极显著差异,故可以此初选出优良新品种单株;5个杂交组合杂种苗普遍发病,发病率均达100%,以69号为母本的3个杂交组合杂种苗表现出较低的感病指数,抗黑斑病能力优于以57号为母本的2个杂交组合。
Abstract： Indoor artificial crosses for two groups of Populus deltoides （I-69 and I-57） （female） ： I-69 with P. cathayana, P. szechuanica, and P. purdomii （ male ） and I-57 with P. cathayana and P. szechuanica were carried out in the spring of 2006. Then, in September 2007, growth performance, and infection from Marssonina brunnea fungi on the 1-year-old hybrid seedlings were tested, with a 30 cm×40 cm seedling space design having 10 seedlings per plot and 3 replications using an ANOVA with an LSD test. Results among the five crosses showed that percentage of fruit set and seed germination ranged from 55% to 20% for the I-69 group and 20% to 5% for the I-57 group. Best growth performances were with I-69 x P. szechuanica having a mean hybrid seedling height of 2.87 m and I-69 × P. purdomii （2.38 m） along with root-collar diameters 2.57 and 2.13 cm, respectively. The LSD test also showed that hybrid seedling growth for mean height and root-collar diameter of 1-69 was significantly greater（P 〈 0.01 ） than the I-57 group. M. brunnea infected 100% of all hybrid seedlings; however, the infection index of the I-69 group was lower. Thus, the I-69 × P. szechuanica, I-69 × P. cathayana, and I-69 ×P. purdomii crosses have good resistance to M. brunnea.
出处
《浙江林学院学报》
CSCD
北大核心
2009年第6期778-783,共6页
Journal of Zhejiang Forestry College
基金
陕西省科学技术攻关项目(2003K02-G8)
关键词
林木育种学
杂交育种
美洲黑杨
青杨
川杨
卜氏杨
苗期测定
forest tree breeding
cross breeding
Populus deltoids
Populus cathayana
Populus szechuanica
Populus purdomii
hybrid seedling traits
