摘要
本文利用美洲黑杨的三个栽培品种与欧美杨四个栽培品种搭配成七个杂交组合,采取人工水培杂交,研究F_1代苗木选种潜力。经过八年的试验(1982年开始),选择出鲁克斯杨×山海关杨;山海关杨×哈佛杨,Ⅰ-72杨×山海关杨三个优良组合。四年生树高超过沙兰杨(CK)23％～35.7 ％;胸径超CK 26.5 ％～81.5％。表现出明显的杂交优势规律:美洲黑杨CV之间杂交F_1代形态分化类型少,生长量大,超亲,超过对照优势强,是选出的优质速生新无性系;欧美杨CV之间杂交F_1代类型分化多,生长量小,超亲优势很小或负值,选择生长量超过沙兰杨的可能性很小;美洲黑杨CV与欧美杨CV之间杂交F_1代类型分化、超亲优势介于上述两者之间,生长量较大,是可供选择的比较理想无性系。
3 cultivars of Populus deltoides Marsh and 4 cultivars of P. x euramericana (Dode) Guinier are used as male and/or female parents to carry out 7 species and/or cultivars combinations of hybridizatios in this test. The F1 hybrids of these combinations have been studied for 8 years (1982~1990) and 3 combinations among them have been selected as good combinations which are Populus deltoides cv. 'LUX' x p. deltoides cv. 'Shan Hai Guan', P. deltoides cv. 'Shan Hai Guan' xP. deltoides cv.'Harvard' and P. x euramericana cv. 'San Martino'x P. deltoides cv.'Shan Hai Guan'. At age 4, the hybrids of these 3 combinations exceeded P. x euramericana cv. Sacran 79 (control) in height by 23%~37.5% and in breast high diameter by 26.5%~81.5% and expressed obvious hybrid vigor. The hybrids of P. deltoides cv. x p. deltoides cv. differentiate a fewer morphological forms and their growth rate is higher than that of their parents and control. From these hybrids we have obtained some new clones which possess such characteristics as high quality and fast growth. The F1 hybrids of P. x euramericana cv. x P. x euramericana cv. differentiate more morphological forms which grow relatively slowly. The transgressive inheritance in growth rate of these hybrids is less or negative and it is impossible to choose any clone surppassing control in growth rate from them. The F1 hybrids of P. deltoides cv. x P. x euramericana cv. are the intermediate forms of the above mentioned F, hybrids. Since the growth rate of these hybrids is relatively high, it is possible to choose some ideal clones from them.
出处
《林业科学研究》
CSCD
北大核心
1991年第2期201-206,共6页
Forest Research
关键词
美洲黑杨
欧美杨
杂交
选种
Populus deltoides
Populus x euramericana
hybridization
selective breeding potentiality
