木薯品种新选048体细胞胚发生及植株再生初步研究

【目的】初步探讨木薯品种新选048体细胞胚发生及植株再生的影响因素,为木薯遗传转化和品种改良奠定基础。【方法】以不同外植体(未完全张开叶、侧芽茎尖、幼嫩叶柄及完全张开叶的顶部、基部、叶缘、中部和全叶)为材料,对木薯体细胞胚发生和愈伤组织生长进行观察,并探讨6.BA(0.01、0.05、0.10、0.50、1.00mg/L)对体细胞胚植株再生的影响。【结果】不同木薯外植体均能诱导愈伤组织,愈伤组织诱导率为48.30%~100.00%,但产生的愈伤组织生长状况表现不同。在MS+12.0mg/L毒莠定(picloram)+20.0g/L蔗糖+6.5g/L琼脂培养基中,侧芽茎尖诱导获得的初生体细胞胚诱...

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Published in南方农业学报 Vol. 45; no. 11; pp. 1916 - 1920
Main Author 曾文丹 陆柳英 谢向誉 周慧文 严华兵
Format Journal Article
LanguageChinese
Published 广西作物遗传改良生物技术重点开放实验室,南宁530007%广西农业科学院经济作物研究所,南宁,530007%广西大学农学院,南宁,530005 2014
广西农业科学院经济作物研究所,南宁530007
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ISSN2095-1191
DOI10.3969/j.issn.2095-1191.2014.11.1916

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Summary:【目的】初步探讨木薯品种新选048体细胞胚发生及植株再生的影响因素,为木薯遗传转化和品种改良奠定基础。【方法】以不同外植体(未完全张开叶、侧芽茎尖、幼嫩叶柄及完全张开叶的顶部、基部、叶缘、中部和全叶)为材料,对木薯体细胞胚发生和愈伤组织生长进行观察,并探讨6.BA(0.01、0.05、0.10、0.50、1.00mg/L)对体细胞胚植株再生的影响。【结果】不同木薯外植体均能诱导愈伤组织,愈伤组织诱导率为48.30%~100.00%,但产生的愈伤组织生长状况表现不同。在MS+12.0mg/L毒莠定(picloram)+20.0g/L蔗糖+6.5g/L琼脂培养基中,侧芽茎尖诱导获得的初生体细胞胚诱导率最高,达22.22%,平均产胚量为5.85个;而叶柄、未完全张开叶片或全张开叶片不同部位均不利于诱导体细胞胚,其诱导率极低,为0~5.00%。随着MS培养基中6.BA用量的增加,体细胞胚的成熟率不断增加(81.3%~100.0%),而在MS+0.01mg,L6-BA+0.02mg/L NAA培养基中的植株再生率呈先升高后下降的变化趋势;当6.BA用量为0.10mg/L时,植株再生率最高,为21.8%,且子叶生长正常。在1/3MS+0.02mg/L NAA生根培养基中,再生植株均能诱导生根;在沙与表土混合基质中生根植株均能正常生长。【结论】新选048可以通过体细胞胚发生途径获得再生植株,但其发生率和再生率较低。
Bibliography:cassava; Xinxuan 048; somatic embryogenesis; plantlet regeneration
45-1381/S
Objective 】Influence factors of somatic embryogenesis and plantlet regeneration for cassava Xinxuan 048 were investigated preliminarily in order to lay the foundation for genetic transformation and variety improvement of cas-sava. 【 Method 】 Taking different explants viz. fully expanded leaf, axillary buds apex, young petiole, and the top,base, margin, middle and whole of fully expanded leaf as experimental materials, the somatic embryogenesis and callus of cassava were induced, and the effects of 6-BA(0.01, 0.05, 0.10, 0.50 and 1.00 mg/L) on somatic embryo plantlet regeneration were investigated. 【 Result 】 All different explants could induce callus with 48.30 %-100.00 % of induction rate, while the induced callus presented different growing status. In MS medium adding 12 mg/L picloram,20.0 g/L sucrose, and 6.5 g/L agar, the axillary buds could induce primary somatic embryo, its induction rate(22.22%) was the highest, and the average
ISSN:2095-1191
DOI:10.3969/j.issn.2095-1191.2014.11.1916