中国稻米

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云南药用野生稻幼穗离体培养研究

  1. 1云南省农业科学院生物技术与种质资源研究所/云南省农业生物技术重点实验室/农业农村部西南作物基因资源与种质创制重点实验室,昆明 650205;2云南省农业科学院粮食作物研究所,昆明 650205;3云南大学生命科学学院,昆明 650091
  • 出版日期:2020-03-20 发布日期:2020-03-20
  • 通讯作者: 程在全
  • 基金资助:

    国家重点研发计划“七大农作物育种”子课题(2017YFD0100202);云南省农业基础研究联合专项面上项目[2018FG001(-068); 2017FG001(-023)]

Study on in Vitro Culture of Young Shoots of Oryza officinalis Wall. in Yunnan

  • Online:2020-03-20 Published:2020-03-20

摘要:

药用野生稻由于结实率低、落粒性强,难以利用种子保存繁殖。为了进一步在育种中有效地利用药用野生稻抗虫、抗病、抗旱、分蘖力强等优良特性,本研究利用药用野生稻幼穗,通过离体培养方法获得植株再生苗。实验设计了10种不同生长调节剂浓度的愈伤诱导培养基,筛选出N6+2,4-D 2.0 mg/L+植物凝胶 2.8 g/L + 蔗糖30 g/L、pH值5.8是最适合愈伤诱导的培养基;设计了10种分化培养基,筛选出N6+6-BA 0.3 mg/L+NAA 0.3 mg/L+ZT 2.0 mg/L+KT 3.0 mg/L+植物凝胶 2.8 g/L+蔗糖30.0 g/L、pH值5.8最适合作分化的培养基。设计了10种生根培养基,1/2 N6+ NAA 0.2 mg/L + 植物凝胶 2.8 g/L + 蔗糖15.0 g/L、pH值5.8最适合作生根培养基。研究发现用4℃低温对幼穗前处理,然后使用强弱光照交替进行预培养后再进行愈伤诱导,可获得较高的愈伤诱导率。

关键词: 药用野生稻, 幼穗, 离体培养, 野生稻

Abstract:

Because of its low seed setting rate and strong granulation, it is difficult to use seeds to preserve and reproduce Oryza offcinalis. To effectively utilize its qualified characteristics of Oryza offcinalis in further rice breeding, the tissue culture and rapid propagation system of Oryza offcinalis was established by using the panicle as explants. The effects of various plant grouth regulators combinations on callus induction, differentiation and rooting were studied. The results showed that the optimal medium for induction of panicles of Oryza offcinalis was N6+2.0 mg/L 2,4-D + 2.8 g/L plant gel + 30.0 g/L sucrose. The optimal differentiation medium was N6 + 0.3 mg/L 6-BA + 0.3 mg/L NAA + 2.0 mg/L ZT + 3.0 mg/L KT + 2.8 g/L plant gel + 30.0 g/L sucrose, and the best rooting medium was 1/2 N6 + 0.2 mg/L NAA + 2.8 g/L plant gel + 15.0 g/L g sucrose, the most suitable pH was 5.8. The results also revealed that higher callus induction rate was obtained when young panicles were pretreated at 4℃ and then precultured by alternating light and dark.

Key words: O. officinalis, young ears, in vitro culture, wild rice

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