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在玉米带角玉米中对周围皮肤色素变化的遗传分析

Dylan L Schoemaker¹, Yinjie Qiu², Natalia de Leon¹

¹Department of Plant and Agroecosystem Sciences, University of Wisconsin-Madison, Madison, WI 53706, USA.

G3 (Bethesda, Md.)

|November 11, 2023

概括

超越性分离会导致牙玉米杂交品种的周周皮肤色素,即使没有父母色素. 基因测绘确定了关键的基因位点,包括P1位点的新型等位基因,影响这种特征.

科学领域:

植物遗传学植物遗传学
玉米育种玉米育种
农业科学农业科学

背景情况:

商业黄色玉米对非黄色玉米粒有严格的限制.
虽然父系通常是肤浅的,但繁殖可能会产生意想不到的色素性皮卡体变异.
了解皮色素对于保持玉米谷物质量标准至关重要.

研究的目的:

为了调查dent玉米中围心皮肤色素变化的遗传基础.
为了确定负责色素强度的特定基因和等位基因.
了解跨越性隔离在产生新型色素化模式中的作用.

主要方法:

评估了10个双倍的平分体双亲种群,以检测周围皮颜色.
使用奇平方测试来评估遗传的遗传模型.
用RGB色调值量化测量色素强度,在1,327个杂交系中使用.
采用遗传映射和全基因组关联研究 (GWAS) 来识别位点.

主要成果:

在大多数人群中,周围肌皮肤色素遗传最适合2或3基因的表观性模型.
在种群之间确定了色素强度的显著差异.
在W606S衍生系中检测到一个潜在的新型P1-rw等位基因,与黑暗的周心相关.
在LH82-衍生种群中,在染色体2上找到一个单独的定量特征位点 (QTL) 区域.
GWAS发现了4个显著的关联,包括P1区域.

结论:

超越性分离可以在缺少父母颜色的形玉米中产生周周皮肤色素.
在P1位点的功能性基变异部分解释了观察到的色素.
新的等位基因和QTLs有助于玉米中复杂的周周色的复杂遗传.

关键词:

植物遗传学和基因组学已过期的植物品种保护全基因组关联研究研究.这种颜色的颜色.玉米玉米玉米是一种周围心脏 (pericarp) 的一个部分.颜色颜色颜色颜色颜色定量特征局部映射定量特征位置映射

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