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中国农学通报 ›› 2022, Vol. 38 ›› Issue (24): 19-27.doi: 10.11924/j.issn.1000-6850.casb2022-0077

所属专题: 生物技术 小麦

• 农学·农业基础科学 • 上一篇    下一篇

荞麦脱壳性状的研究进展

马贵芳1,2(), 辛海波1, 修莉3, 孙朝霞2, 张华1()   

  1. 1北京市园林绿化科学研究院,绿化植物育种北京市重点实验室,北京 100102
    2山西农业大学,山西晋中 030801
    3沈阳市浑南区城乡建设综合执法中心,沈阳 110000
  • 收稿日期:2022-02-05 修回日期:2022-04-27 出版日期:2022-08-25 发布日期:2022-08-22
  • 通讯作者: 张华
  • 作者简介:马贵芳,女,1996年出生,山西大同人,硕士研究生,研究方向:种质创新与遗传育种。通信地址:100102 北京市朝阳区花家地甲7号 北京市园林绿化科学研究院,E-mail: 1783526621@qq.com
  • 基金资助:
    国家自然科学基金面上项目“苦荞脱壳关键基因的鉴定与分子调控机制研究”(31871691)

Buckwheat Seed Shelling Characters: A Review

MA Guifang1,2(), XIN Haibo1, XIU Li3, SUN Chaoxia2, ZHANG Hua1()   

  1. 1Beijing Institute of Landscape Architecture, Beijing Key Laboratory of Greening Plants Breeding, Beijing 100102
    2Shanxi Agricultural University, Jinzhong, Shanxi 030801
    3Comprehensive Law Enforcement Center for Urban and Rural Construction in Hunnan District, Shenyang 110000
  • Received:2022-02-05 Revised:2022-04-27 Online:2022-08-25 Published:2022-08-22
  • Contact: ZHANG Hua

摘要:

荞麦适应性广、种质资源丰富,是一种药食同源作物,其籽实具有很高的营养价值。荞麦籽粒由胚、胚乳和外壳构成,外壳富含木质素、纤维素和糖,导致脱壳困难,这一性状严重制约着荞麦加工产业的发展,因此培育易脱壳种质资源是荞麦育种的主要目标之一。荞麦种壳的形成和开裂受遗传和环境共同调控,为了充分了解影响荞麦脱壳的因素,本研究归纳了不同荞麦种壳的组成及细胞排列方式;总结了酶在种子壳裂发生过程中的作用及蜡质角质层在种子外壳脱落过程中的功能;分析了转录因子对壳发育的调控。本研究同时指出了薄壳和厚壳荞麦种壳发育和裂壳性状的主要差异及其关键候选调控基因,为脱壳关键调控基因克隆和高效分子设计育种提供重要的理论依据。

关键词: 荞麦, 脱壳, 细胞壁降解酶, 角质层, 转录因子

Abstract:

Buckwheat has a wide range of adaptation and rich germplasm, and it is a medicinal and food crop. Its seeds have a high nutritional value. Buckwheat seeds are composed of embryos, endosperm and hulls. The hull is rich in lignin, cellulose and sugar, which makes it difficult to shell. This trait seriously restricts the development of the buckwheat processing industry. Therefore, cultivating germplasm resources which are easy to shell is one of the main objectives of buckwheat breeding. The formation and dehiscence of buckwheat hulls are regulated by both genetic and environmental factors. In order to fully understand the factors affecting buckwheat hull dehiscence, this study summarized the composition and cellular arrangement of different buckwheat hulls, generalized the function of enzymes in the process of seed hull dehiscence and the function of the waxy cuticle in the process of seed hull shedding, and analyzed the regulation of transcription factors on hull development. It also pointed out the main differences and relative key candidate genes in hull development and hull dehiscence traits between thin and thick hulled buckwheat seeds, which could provide an important theoretical basis for the cloning of key regulatory genes for dehiscence and efficient molecular design breeding.

Key words: buckwheat, seed shelling, cell wall degrading enzymes, cuticle, transcription factor

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