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中国农学通报

中国农学通报 ›› 2010, Vol. 26 ›› Issue (2): 74-79.

所属专题： 生物技术； 玉米

• 农学 农业基础科学 • 上一篇    下一篇

耐低磷基因型甜玉米的苗期筛选研究

贺囡囡,郭荣发   

  • 收稿日期:2009-10-19 修回日期:2009-09-22 出版日期:2010-01-20 发布日期:2010-01-20

Screening and Research of Sweet Maize with Tolerance to Low Phosphorus Stress at Seedling Stage

  • Received:2009-10-19 Revised:2009-09-22 Online:2010-01-20 Published:2010-01-20

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摘要：

以18个甜玉米品种为材料，设置低磷和高磷处理，采用盆栽试验研究了甜玉米苗期的主要形态和生理指标，并分析了其相关关系。结果表明：低磷胁迫对不同甜玉米品种苗期干物重和植株磷积累量影响较大，不同甜玉米品种耐低磷能力存在明显的基因型差异，干物重和植株磷积累量可作为甜玉米耐低磷基因型筛选的指标。18个供试甜玉米品种中，顶尖、台湾华珍和先甜5号对低磷土壤的忍耐能力较高，属于耐低磷品种；金茂3号、美玉3号和金圣王对低磷土壤的忍耐能力较差，属于低磷敏感品种；其余12个品种属于中等耐低磷品种。

关键词: 铝胁迫, 铝胁迫, 柑橘, 生长

Abstract:

Main biological traits of sweet maize and their relationships were investigated under both low phosphorus and high phosphorus conditions, with 18 landraces at seedling stage. The results showed that low phosphorus stress had greater influence on dry matter weight and P accumulation. There existed genotype differences of sweet maize landraces in tolerance to low-P stress. Dry matter weight and P accumulation could be used as indexes of screening sweet maize with tolerance to low- phosphorus.The result also indicated that Dingjian, Taiwanhuazhen and Xiantian number 5 had better tolerant ability to low-phosphorus stress, belonging to low-phosphorus-resistence varieties; while the tolerant ability to low-phosphorus stress of Jinmao number 3, Meiyu number 3 and Jinshengwang were very worse, belonging to low-phosphorus-sensitive varieties; and the other varieties belonged to the middle low-phosphorus-resistence varieties.