摘要
利用近期育成的若干高产品种（系），研究前期营养生长基础、花期前后株型演变及成熟期冠层结构差异。干物质积累量宁杂１号始终占优势，９２—７—５８前期弱后期强，宁油１０号和荣选长势一直较弱。宁杂１号干物质的分配较为合理，各生育期生长中心的转移较快，宁油１０号营养物质利用率高。总光合面积指数，宁杂１号亦占优势，其最大值出现在花后期。成熟期宁杂１号结角层分布偏上，９２—７—５８偏下，而宁油１０号较分散。宁杂１号属于多枝多角、小粒、高产的优势型品种，宁油１０号属于少枝少角、大粒、多粒、高产的经济型品种，油菜育种以选育优势型和经济型品种为宜。
The difference of vegetative basis of recently released high yielding varieties ( Brassica napus ), their changing in plant type during the period of pre flowering to post flowering and the features of canopy structure at maturity were studied. Results showed that the quantity of dry matter (DM) accumulated were different among these varieties. Ningza No.1 had the highest DM accumulation during the observation period, compared with other genotypes, DM accumulation of 92—7—58 was lower at pre flowering stage but higher at post flowering stage, while that of Ningyou No.10 and Rongxun were lower both in pre and post flowering stage. The distribution of DM in Ningza No.1 was reasonable, it resulted in a quick change over in plant developing center at different period. The dry matter of Ningyou No.10 was used efficiently. Ningza No.1 had the biggest total photosynthesis area index (TAI), which emerged at post flowering stage. Ningza No.1 was characterized with a upper pod setting layer, 92—7—58 had a lower pod setting layer, while Ningyou No.10 had scattered one. Ningza No.1 was characterized with more branches, more pods per plant, small size seed and high yield capacity, while Ningyou No.10 was characterized with less branches, less pods per plant, large seed size, more seeds per pod and high yielding. To breed superior or economical type of varieties could be a reasonable breeding stratage in rapeseed.
出处
《中国油料作物学报》
CAS
CSCD
北大核心
1998年第3期36-41,共6页
Chinese Journal of Oil Crop Sciences
基金
国家自然科学基金
