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云南农业大学学报(自然科学) 2017, Vol. 32 Issue (4) :577-581    DOI: 10.16211/j.issn.1004-390X(n).2017.04.002
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氮素和Wx基因缺失对小麦淀粉生物合成的影响
李昆仑1, 孔治有2, 沙云3, 唐永生4, 程顺和5, 覃鹏1
1. 云南农业大学 农学与生物技术学院, 云南 昆明 650201;
2. 保山学院 资源环境学院, 云南 保山 678000;
3. 临沧市农业科学研究所, 云南 临沧 677000;
4. 曲靖市农业科学院, 云南 曲靖 655000;
5. 江苏里下河地区农业科学研究所, 江苏 扬州 225007
Effects of Nitrogen and Wx Gene Deletion on Starch Biosynthesis in Wheat
LI Kunlun1, KONG Zhiyou2, SHA Yun3, TANG Yongsheng4, CHENG Shunhe5, QIN Peng1
1. College of Agronomy and Biotechnology, Yunnan Agricultural University, Kunming 650201, China;
2. College of Resources and Environment, Baoshan University, Baoshan 678000, China;
3. Lincang Agricultural Science Institution, Lincang 677000, China;
4. Qujing Agricultural Science Academy, Qujing 655000, China;
5. Lixiahe Region Agricultural Research Institute of Jiangsu Province, Yangzhou 225007, China

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摘要 

[目的]通过不同氮素施用水平,明确氮肥水平及灌浆时期对小麦Wx近等基因系籽粒淀粉含量的影响。[方法]以宁麦14为背景的8个小麦Wx近等基因系为材料,不施底肥、在三叶期追施0、150、300、450、600 kg/hm2的尿素作为氮素梯度,测定灌浆7、14、21、28、35 d的小麦籽粒直链、支链淀粉和总淀粉含量。[结果]Wx基因型、灌浆时间对小麦籽粒的直链淀粉、支链淀粉和总淀粉含量产生显著影响,而氮素水平未引起淀粉含量及成分产生显著变化;淀粉合成在花后10 d以后极大加快、而到灌浆结束又明显趋缓。[结论]3个Wx基因直链淀粉的合成能力Wx-B1 > Wx-D1 > Wx-A1,其中Wx-D1Wx-A1基因的综合作用与Wx-B1基本相当。

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李昆仑
孔治有
沙云
唐永生
程顺和
覃鹏
关键词Wx近等基因系   氮素水平   淀粉   生物合成     
Abstract

[Purpose] The effects of nitrogen fertilizer level and grain filling stage on the grain starch content of near isogenic Wx wheat lines were determined by different nitrogen application levels.[Method] Eight Wx near-isogenic wheat lines in Ningmai 14 were researched at no basal fertilizer, and 5 nitrogen levels including 0, 150, 300, 450 and 600 kg/hm2 were fertilized at three-leaf period. The amylose, amylopectin and total starch contents of wheat grain were determined at 7, 14, 21, 28 and 35 days after anthesis.[Results] The grain amylose, amylopectin and total starch contents were significantly affected by the Wx genotypes and grain filling period, while the nitrogen levels did not cause significant changes in content and composition of starch. Starch synthesis was speed up 10 d after anthesis till the end of filling period.[Conclusion] The amylose synthesis ability of three Wx genes was Wx-B1 > Wx-D1 > Wx-A1, and the comprehensive effect of Wx-A1 and Wx-D1 was the equivalent of Wx-B1.

KeywordsWx near-isogenic wheat lines   nitrogen level   starch   biosynthesis     
Received 2017-02-21;
Fund:

云南省科技计划项目(2015BB016);昆明市科技计划项目(2015-1-H-00308)。

Corresponding Authors: 覃鹏(1977-),男,湖北利川人,博士,副教授,主要从事小麦遗传育种与品质改良研究。E-mail:qinpeng77@163.com     Email: qinpeng77@163.com
About author: 李昆仑(1982-),男,山东即墨人,硕士研究生,主要从事小麦遗传育种与品质改良研究。E-mail:sdaulkl82@163.com
引用本文:   
李昆仑, 孔治有, 沙云, 唐永生, 程顺和, 覃鹏.氮素和Wx基因缺失对小麦淀粉生物合成的影响[J]  云南农业大学学报(自然科学), 2017,V32(4): 577-581
LI Kunlun, KONG Zhiyou, SHA Yun, TANG Yongsheng, CHENG Shunhe, QIN Peng.Effects of Nitrogen and Wx Gene Deletion on Starch Biosynthesis in Wheat[J]  Journal of Yunnan Agricultural University, 2017,V32(4): 577-581
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