通过对vte4,crtRB1和不透明2基因进行标记辅助育种,提高玉米核的营养质量
Firoz Hossain1, Sunil K Jaiswal2, Vignesh Muthusamy2
1Division of Genetics, ICAR-Indian Agricultural Research Institute, New Delhi, 110012, India. fh_gpb@yahoo.com.
Journal of applied genetics
|July 14, 2023
概括
分子育种增强了玉米杂交,增加了维生素E,维生素A,氨酸和氨酸. 这些改进的玉米品种为打击营养不良提供了可持续的解决方案,而不会影响产量.
科学领域:
- 农业科学 农业科学
- 生物技术是生物技术.
- 营养科学 营养科学
背景情况:
- 传统的玉米品种缺乏必需的营养物质,如维生素E (α-托哥法醇),维生素A (补维生素A),氨酸和氨酸.
- 这些缺陷导致营养不良,特别是在依赖玉米作为主食的人群中.
研究的目的:
- 通过分子育种技术开发增强的玉米杂交品种,以改善营养特征.
- 增加玉米中维生素E,维生素A,氨酸和氨酸的水平,以打击营养不良.
主要方法:
- 利用分子育种,在父母系中结合了vte4,crtRB1和不透明2 (o2) 基因的有利基因.
- 采用了基因特异性标记物,用于跨多代的选择 (BC1F1,BC2F1,BC2F2).
- 使用简单序列重复 (SSR) 进行了背景选择,以实现高反复性母基因组恢复 (94%).
主要成果:
- 进化杂交动物的阿尔法-托科菲罗尔含量显著增加 (18.38ppm与8.17ppm相比),阿尔法/马-托科菲罗尔和阿尔法/总托科菲罗尔的比率有所改善.
- 新获得的杂交动物表现出高水平的β-胡卜素 (8.91 ppm),β-加密素 (1.27 ppm),维生素A (9.54 ppm),素 (0.348%),和酸盐 (0.082%).
- 与传统杂交物相比,复合杂交物显示出维生素E,益维生素A,氨酸和氨酸含量大幅增加 (高达5.7倍),谷物产量和表型相似.
结论:
- 通过向基因内进和分子育种,开发出富含多种营养素的玉米杂交.
- 这些改良的玉米杂交品种具有显著改善的营养价值,并具有可持续和成本有效的营养不良缓解潜力.
- 该研究强调了分子育种在增强主食作物的有效性,以改善公共卫生结果.
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