摘要
采用田间试验方法研究有、无花瓣油菜花期前后的株型演变及其与成熟期株型结构的关系。结果表明，无花瓣油菜花期缺少花瓣，植株中、下部受光充足，光合产物多，形成低分枝、多分枝、结角层厚、角果多的大株型。有花瓣品种宁油７号花瓣影响透光，下部分枝退化多，形成高分枝、少分枝、结角层薄、角果少而集中的较小株型。还研究了株型质量问题。
The changings of the features of plant-type structure (PTS) during the period of begining-to post-flowering and its effects on PTS at mature time were investigated in normal and apetalous rapeseed (B. napus). Results showed that photosynthesis active areas was gradually moving to upper from lower part of plants of both normal Petal and apetalous rapeseed during begining to post-flowering. As a result, the accumulating and distribution region of photosynthesis products in the plants changed to the upper part from lower. At pet-flowering, the majority of the photosynthesis active areas was green pods and most of the photosynthesis products was distributed to embryoes mainly for seeds developing. At full-flowering,the lower part of apetalous rapeseed plants could receive plenty of sunlightspenetrted from the top due to Petals missing, which may benefit the coddle and lower parts of the plants to promote and accumulate more photosynthesis products. So a big plant was developed with lower branching point, more branches, more pods and a thick layer of preset for apetalous rapeseed. While most of branches emerged on lower part of normal petal rapeseed plants were degenerated resulting from sunlight insufficiency which caused by Petal absorbtion and renection. As a result, less branches, less pods and a relatively small plant characterized by higher branching point and a relatively small plant characterized by higher branching POint and a thiner layer of pod-set developed for 'Ningyou No. 7'. The quality of plant-type was discussed also in this paper.
出处
《中国油料》
CSCD
北大核心
1996年第4期23-27,共5页
基金
国家自然科学基金
关键词
油菜
株型
无花瓣
原型结构
Brassica napus Plant-type structure Apetalous
