| 甘蓝型黄籽油菜与黑籽油菜苗期生理特性的比较研究 |
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| 引用本文： | 张子龙,陶士珩,李加纳.甘蓝型黄籽油菜与黑籽油菜苗期生理特性的比较研究[J].作物学报,2007,33(5):837-842. |
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| 作者姓名： | 张子龙 陶士珩 李加纳 |
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| 作者单位： | 1.西南大学农学与生物科技学院，重庆北碚 400716；2西北农林科技大学生物信息学研究中心，陕西杨凌 712100 |
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| 基金项目： | 国家自然科学基金;引进国际先进农业科学技术计划(948计划)项目 |
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| 摘 要： | 油菜苗期的植株长势与抗性及后期产量密切相关。为探索甘蓝型黄籽油菜抗逆性较弱和产量较低的原因，以2对不同遗传来源的甘蓝型黄、黑籽油菜近等基因系为材料，研究了苗期植株的主要生理特性。结果表明，甘蓝型黄籽油菜苗期生长势弱，叶绿素含量和类胡萝卜素含量，光合速率和叶面积指数（LAI）均比相同遗传背景下的黑籽油菜低；与黑籽油菜相比，甘蓝型黄籽油菜无论是在不同的叶龄期，还是在植株的不同部位，均表现出“糖高氮低”的代谢特点，且越冬期叶片的硝态氮含量和硝酸还原酶活性也低；根颈粗和单株干物质重也明显小。甘蓝型黄籽油菜苗期生长势弱，冬前干物质积累偏少，进而影响其春后的生殖生长，这可能是其产量较低的重要原因之一。
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| 关 键 词： | 甘蓝型黄籽油菜 生理特性 苗期 |
| 收稿时间： | 2006-06-08 |
| 修稿时间： | 2006-10-09 |
A Comparative Study on Physiological Characteristics during Seedling Stage in Yellow-Seeded and Black-Seeded Rapeseed (Brassica napus L.) |
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| ZHANG Zi-Long,TAO Shi-Heng,LI Jia-Na.A Comparative Study on Physiological Characteristics during Seedling Stage in Yellow-Seeded and Black-Seeded Rapeseed (Brassica napus L.)[J].Acta Agronomica Sinica,2007,33(5):837-842. |
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| Authors: | ZHANG Zi-Long TAO Shi-Heng LI Jia-Na |
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| Institution: | 1.College of Agronomy and Biotechnology，Southwest University，Beibei 400716, Chongqing;2.Institute of Bioinformatics，Northwest Agriculture and Forest University, Yangling 712100, Shaanxi, China |
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| Abstract: | Yellow-seeded rapeseed(Brassica napus L.) is characterized with thinner seed coat and lower hull percentage,which in turn is correlated with higher oil,protein,and lower crude fiber contents compared with black-seeded rapeseed from the same genetic background.The breeding of yellow-seeded rapeseed has become one of the main objectives in rapeseed breeding.However,the growth vigor, resistance,and yield of yellow-seeded rapeseed are not so good as black-seeded rapeseed.The growth vigor of rapeseed plants during seedling stage is in connection with its yield significantly.Two pairs of different genetic near-isogenic lines of yellow-seeded and black-seeded rapeseed(Brassica napus L.) genotypes were used to study the physiological characters of yellow-seeded rapeseed in seedling stage,which included photosynthetic characters,characters on C/N metabolism,and accumulation of dry matter.The results showed that the chlorophyll content and carotenoid content of yellow-seeded rapeseed were lower than those of black-seeded rapeseed,and its net photosynthetic rate was lower compared to blackseeded rapeseed from the same genetic background.The leaf area index(LAI) of yellow-seeded rapeseed was lower than that of black-seeded rapeseed.It was found that there were higher total sugar content and lower protein content in yellowseeded rapeseed plants than in black-seeded rapeseed plants in every plant organs during seedling stage,and there were lower nitrogen content and activity of nitrate reductase in yellow-seeded rapeseed plants than in black-seeded rapeseed plants at overwintering stage.Width of root colla and dry matter per plant in yellow-seeded rapeseed plants were also lower than those in black-seeded rapeseed plants,indicating the weak growth vigor of yellow-seeded rapeseed.All those above were the important reasons leading to the lower yield of yellow-seeded rapeseed. |
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| Keywords: | Yellow-seeded rapeseed(Brassica napus L ) Physiological characters Seedling stage |
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