| 摘要: |
| 【目的】明确影响甘蓝型油菜种子含油量的主要气象因子，为高含油量育种提供一定的理论依据。【方法】以12个种子含油量不同的甘蓝型油菜品系为材料，探索在汉中和杨凌2种生态环境下油菜种子发育过程中油分积累的异同，分析油菜角果期主要气象因子与种子油分形成的相关性及对种子含油量的影响。【结果】不同生态环境下油菜种子中油分积累差异显著，汉中花后21～42 d为油分快速积累期，持续时间为21 d，而杨凌花后28～42 d为油分快速积累期，持续时间为14 d；在汉中生态环境下，油菜种子含油量与日均最低温度、日均最小湿度呈显著正相关，与日均温差呈显著负相关；在杨凌生态环境下，油菜种子含油量与日均温度、日均最高温度、日均日照时数均呈显著或极显著负相关。【结论】在油菜籽粒油分形成过程中,气象因素和积累时间起决定性作用。 |
| 关键词: 甘蓝型油菜 种子含油量 气象因子 |
| DOI： |
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| 基金项目:陕西省科技统筹创新工程计划项目“主要粮油作物新品种选育”（2011KTZB02-01-03） |
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| Correlation between meteorological factors and oil content in pod of Brassica napus L. |
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KANG Wenxia,DONG Jungang,MENG Qian,et al
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| Abstract: |
| 【Objective】This study clarified the main meteorological factors affecting oil content in Brassica napus L.to provide theoretical basis for breeding of varieties with high oil content.【Method】Twelve rapeseed lines with different oil contents were used to study the dynamic changes of oil content during seed formation,the correlation between meteorological factors and oil content,and the influence of geographical metrological factors on oil content in developing seeds of B.napus from Hanzhong and Yangling.【Result】Dynamic accumulation of oil during seed formation differed greatly among the 2 geological locations of Hanzhong and Yangling.In Hanzhong,oil accumulated rapidly 21-42 days after flowering (DAF) with the period of 21 days.In Yangling,it accumulated 28-42 DAF with the period of 14 days.In Hangzhong,the correlations of oil content with daily mean minimum temperature and daily mean minimum humidity were extremely positive,where the relationship with daily mean temperature difference was extremely negative.In Yangling,the relationships with daily mean temperature,daily mean highest temperature and daily mean sunshine hours were extremely negative.【Conclusion】Meteorological factors and accumulation time were decisive for oil formation of B.napus L. |
| Key words: Brassica napus L. oil content meteorological factors |
