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首页> 外文期刊>Genetics: A Periodical Record of Investigations Bearing on Heredity and Variation >The narrow sheath Duplicate Genes: Sectors of Dual Aneuploidy Reveal Ancestrally Conserved Gene Functions During Maize Leaf Development
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The narrow sheath Duplicate Genes: Sectors of Dual Aneuploidy Reveal Ancestrally Conserved Gene Functions During Maize Leaf Development

机译：狭窄的鞘重复基因：玉米叶片发育过程中双重非整倍性的部门揭示了保守的基因功能

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摘要

The narrow sheath mutant of maize displays a leaf and plant stature phenotype controlled by the duplicate factor mutations narrow sheath1 and narrow sheath2. Mutant leaves fail to develop a lateral domain that includes the leaf margins. Genetic data are presented to show that the narrow sheath mutations map to duplicated chromosomal regions, reflecting an ancestral duplication of the maize genome. Genetic and cytogenetic evidence indicates that the original mutation at narrow sheath2 is associated with a chromosomal inversion on the long arm of chromosome 4. Meristematic sectors of dual aneuploidy were generated, producing plants genetically mosaic for NARROW SHEATH function. These mosaic plants exhibited characteristic half-plant phenotypes, in which leaves from one side of the plant were of nonmutant morphology and leaves from the opposite side were of narrow sheath mutant phenotype. The data suggest that the narrow sheath duplicate genes may perform ancestrally conserved, redundant functions in the development of a lateral domain in the maize leaf.
机译：玉米的窄鞘突变体显示出叶片和植物的表型，受双重因子突变窄鞘1和窄鞘2的控制。突变叶片无法形成包括叶片边缘的横向域。遗传数据表明，狭窄的鞘突变映射到重复的染色体区域，反映了玉米基因组的祖先复制。遗传和细胞遗传学证据表明，狭窄鞘2处的原始突变与4号染色体长臂上的染色体倒置有关。产生了双非整倍性的分生组织，产生了具有NARROW SHEATH功能的基因镶嵌植物。这些镶嵌植物表现出特征性的半植物表型，其中来自植物一侧的叶子具有非突变形态，而来自相反一侧的叶子具有窄鞘突变表型。数据表明，在玉米叶片的侧结构域的发育中，窄鞘复制基因可以执行祖先保守的冗余功能。

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