来自小麦-Thinopyrum中间体杂交的黑粒小麦的发展和分子细胞遗传学特征
Chunfei Wu1, Xinyu Zhao1, Mingyao Li1
1Key Laboratory of Molecular Cytogenetics and Genetic Breeding of Heilongjiang Province, College of Life Science and Technology, Harbin Normal University, Harbin, 150025, China.
概括
使用Thinopyrum intermedium开发了具有增强蛋白质的新黑粒小麦生产线. 这些线被确定为双体染色体替代,显示出更好的产量和营养价值,为未来的小麦育种提供了基础.
科学领域:
- 植物遗传学和育种.
- 农作物科学 农作物科学
- 基因组学就是基因组学.
背景情况:
- 薄皮龙中间体是小麦改良的宝贵遗传资源.
- 提高营养质量的小麦,如增加蛋白质含量和新的谷物颜色,是作物科学的一个关键目标.
- 黑粒的特征与有益的植物化学物质有关.
研究的目的:
- 开发具有高谷物蛋白质含量的新型黑粒小麦品种.
- 描述黑粒特征的遗传基础及其与Thinopyrum中间染色体的关联.
- 评估开发的小麦品种的农学性能和营养价值.
主要方法:
- 在小麦品种和Thinopyrum intermedium之间进行杂交.
- 分体染色体置换线的发展.
- 基因组在位杂交 (GISH) 和多色光在位杂交 (mFISH) 用于染色体分析.
- 通过RNA测序 (RNA-seq) 进行单核酸多态性 (SNP) 分析.
- 对F2种群的分析以确认特征关联.
- 在谷物发育过程中的基因表达分析.
主要成果:
- 成功开发了13种黑粒小麦品种,其中包括黑色内和高谷蛋白.
- 这些线被确定为二元染色体置换线DS4B/4J或DS4D/4J,表明Thinopyrum中间染色体段的内进.
- 实地试验证实,与父系相比,产量特征优越,蛋白质含量更高.
- 黑粒特征与来自Thinopyrum intermedium的4Jr/St染色体强烈相关.
- 表达式分析显示,在谷物发育过程中,与安托西亚尼相关的基因和bHLHDNA结合蛋白的水平增加,与黑色素质相关.
结论:
- 通过跨物种杂交,创建了具有增强营养特性的新型黑粒小麦品种.
- 黑粒特征与Thinopyrum中间体的特定染色体 (4Jr/St) 联系在一起,为标记器辅助选择提供了宝贵的遗传资源.
- 这些线条代表了在开发具有改善营养价值和独特谷物特性的小麦品种方面取得的重大进步.
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