农业与技术 ›› 2025, Vol. 45 ›› Issue (7): 51-54.DOI: 10.19754/j.nyyjs.20250415011
• 农业科学 • 上一篇
高玉龙 王丙武 赵璐 焦芳婵 吴兴富
出版日期:
2025-04-15
发布日期:
2025-04-15
作者简介:
高玉龙(1976-),男,博士,副研究员。研究方向:烟草生物技术育种。
基金资助:
Online:
2025-04-15
Published:
2025-04-15
摘要: 8-LCY基因是植物类胡萝卜素含量的负调控基因,为了培育可用于烟叶生产的高类胡萝卜素烟草品种, 改善我国烟叶香气不足的缺,点,本研究从我国烤烟主栽品种“云烟87”的基因组数据库中克隆到烟草N-LCYI 基因,并从“云烟87”的EMS突变体库中筛选到1个氨基酸改变的突变体。结果表明,Nt8-LCYI基因CDS长 度为1575bp,编码524个氨基酸。Nte-LCY1蛋白与番茄8-LCY1蛋白相似性为90%,且含有番茄红素环化酶的 特征基元二核苷酸结合基序。从“云烟87”的EMS突变体库中筛选到1个N8-LCYI基因的错义突变体,该突 变体N18-LCY1基因CDS第505位的核苷酸C突变为T,其编码蛋白质第169位的亮氨酸(L)突变为苯丙氨酸 (F)。检测烟叶中类胡萝卜素表明,突变体B-胡萝卜素、紫黄质、B-隐黄质、叶黄素棕榈酸酯含量比“云烟 87”分别提高54.21%、49.07%、40.32%、32.90%,该突变体的获得为后续培育高香气烟草新品种鉴定了基础。
中图分类号:
. 突变tε-LCY1基因获得高类胡萝卜素烟草新品系[J]. 农业与技术, 2025, 45(7): 51-54.
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