Mechanisms and genetic control of botanical composition in mixed swards

混合草地植物成分的机制和遗传控制

• 批准号: 06660330
• 负责人: SUGIYAMA Shuichi
• 金额: $ 1.34万
• 依托单位: Hirosaki University (1995)Hokkaido University (1994)
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1994
• 资助国家: 日本
• 起止时间: 1994 至 1995
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-06660330/
• 关键词: Grasses; Mixture; Competition; Cultivars; 競争力; 競争効果; 競争反応; 種内変異; Lolium perenne.

Intraspecific genetic variability in relative competitive ability was examined in 15 cultivars of perennial ryegrass (Pr). The results were analyzed with the results obtained by previous studies of competitive experiments with orchardgrass (Og) and tall fescue (Tf) cultivars.(1) There were large differences in the relative proportion of biomass in the mixtures among the cultivars of the three grass species : 45-85% for Pr, 45-85% for Og and 11-43% for Tr.The results suggest that botanical composition in mixtures can be easily changed by genetic changes of populations.(2) There were close relationships between the relative proportion of the mixtures and tiller size in the monocultures in the three species.(3) However, the pattern and sign of their relationships varied with the species : a positive linear relation for Pr ; positive quadratic relation for Og and negative linear relation for Tf. I proposed the hypothesis that botanical composition of mixture swards is determined bythe balance between potential productivity and regrowth a bility after defoliation.

对 15 个多年生黑麦草 (Pr) 品种的相对竞争能力的种内遗传变异进行了检查。并与前人果园草(Og)和高羊茅(Tf)品种竞争性试验结果进行分析。(1)三种草品种间混合物中生物量的相对比例存在较大差异。物种：Pr 为 45-85%，Og 为 45-85%，Tr 为 11-43%。结果表明混合物中的植物成分可以很容易地(2) 三个物种的单一栽培中，混合相对比例与分蘖大小之间存在密切关系。(3) 但其关系的模式和迹象因物种而异： Pr 为正线性关系； Og 为正二次关系，Tf 为负线性关系。我提出了这样的假设：混合林的植物组成是由潜在生产力和落叶后再生能力之间的平衡决定的。

项目成果

Sugiyama S.: "Variation in competitive ability and correlated traits in cultivated populations of Lolium perenne" Grassland Science. 41. 9-15 (1995)

Sugiyama S.：“多年生黑麦草栽培种群竞争能力和相关性状的变化”《草原科学》。

Sugiyama S.and H.Nakashima: "Cultivarietal differences in competitive ability and associated traits in orchardgrass (Dactylis glomerata L.)." J.Japan.Grassl Sci. 40. 179-189 (1994)

Sugiyama S. 和 H.Nakashima：“果园草 (Dactylis glomerata L.) 竞争能力和相关性状的品种差异。”

Sugiyama S.: "Cultivarietal differences in competitive ability and associated traits in orchardgrass" J.Jpn.Soc.Grassland Sci. 40. 179-189 (1994)

Sugiyama S.：“果园草竞争能力和相关性状的品种差异”J.Jpn.Soc.Grassland Sci。

Sugiyama S.and H.Nakashima: "Variation in competitive ability and correlated traits in cultivated populations of lolium perenne." Grassland Science. 41. 9-15 (1995)

Sugiyama S. 和 H.Nakashima：“黑麦草栽培种群的竞争能力和相关性状的变化。”

Sugiyama S.: "The relationship between growth and devllopment of vegetative shoots in genotypes of tall fesue" Annals of Botany. 76. 553-558 (1995)

Sugiyama S.：“高羊茅基因型中营养芽的生长和发育之间的关系”植物学年鉴。