铁皮石斛与霍山石斛杂交后代性状分析

为选择杂交后代优良株系,对铁皮石斛（Dendrobium officinale）、霍山石斛（Dendrobium huoshanense）及其杂交F₁代株系的组培苗及栽培苗生长量、表型性状及多糖含量进行测定和分析。结果表明：各株系的组培生长量差异显著,变幅为0.15~0.69 g,超亲株系占75.00%,移栽生长量变幅为0.03~0.44 g,超亲株系占75.00%;组培苗8个表型性状表现为超亲,占总考察性状的88.89%;栽培苗4个表型性状表现为超亲,占总考察性状的44.44%,各株系多糖含量与亲本差异显著,7个株系的多糖含量表现为超亲,占总考察株系的87.50%。可见,利用铁皮石斛与霍山石斛杂交是改良石斛产量与品质的有效途径之一。

Character Analysis of Hybrid Offspring of Dendrobium officinale and Dendrobium huoshanense

To select the best hybrid lines, the growth, phenotypic traits and polysaccharide content of Dendrobium officinale, Dendrobium huoshanense and their F₁ hybrid lines were determined and analyzed. The growth of tissue culture was significantly different in each line, in the range 0.15-0.69 g, superior to their parental strains accounting for 75.00%. The growth of the transplanting seedlings was ranged for 0.03-0.44 g, superior to their parental strains, accounting for 75.00%. Eight phenotypic traits of the tissue culture seedlings showed superior to their parents, accounting for 88.89% of the total investigation. In the transplanting seedlings, four phenotypic traits of the cultivated seedlings showed superior to their parents, accounting for 44.44% of the total investigation. The content of polysaccharides in each line was significantly different from that of their parents. The content of polysaccharides in seven lines was superior to their parents, accounting for 87.50% of the total lines studied. In summary, interspecific hybridization is one of the effective ways to improve the output and quality of Dendrobium.