Advances in maize genomics: the emergence of positional cloning

Bortiri, Esteban; Jackson, D. I.; Hake, Sarah

doi:10.1016/j.pbi.2006.01.006

Cited by 63 publications

(29 citation statements)

References 50 publications

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“…UNVEILING THE NATURE OF QUANTITATIVE VARIABILITY Robertson (1985) postulated that qualitative mutant alleles and QTL alleles represent the extremes of a possible range of effects, with QTLs resulting from the segregation of natural alleles with smaller effects. The cloning of a number of plant QTLs has confirmed Robertson's hypothesis, in as much as the types of mutations, genes, and metabolic pathways determining quantitative traits are not distinct from those underlying Mendelian traits and in some cases involve the same loci for which a strong mutation was already known Bortiri et al, 2006). Examples of the latter are provided by studies of Arabidopsis (Arabidopsis thaliana) tolerance to water deficit (Masle et al, 2005), salinity (Rus et al, 2006), and aluminum (Al) toxicity (Hoekenga et al, 2006).…”

mentioning

confidence: 84%

Quantitative Trait Loci and Crop Performance under Abiotic Stress: Where Do We Stand?: Table I.

Collins

Tardieu²,

Tuberosa³

2008

Plant Physiol.

496

330

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mentioning

confidence: 84%

Quantitative Trait Loci and Crop Performance under Abiotic Stress: Where Do We Stand?: Table I.

Collins

Tardieu²,

Tuberosa³

2008

Plant Physiol.

496

330

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“…mays and represents a powerful tool for the fine-scale resolution and molecular dissection of genes contributing to complex traits in maize. Positional cloning is emerging as the most powerful tool for gene identification in maize, a procedure that is greatly enhanced by the genomic sequencing effort (Bortiri et al 2006). Links to these tools and other related maize resources are summarized in Table 1.…”

Section: Genetics and Genomicsmentioning

confidence: 99%

Maize (Zea mays): A Model Organism for Basic and Applied Research in Plant Biology

Strable¹,

Scanlon²

2009

Cold Spring Harb Protoc

131

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INTRODUCTIONZea mays ssp. mays is one of the world’s most important crop plants, boasting a multibillion dollar annual revenue. In addition to its agronomic importance, maize has been a keystone model organism for basic research for nearly a century. Within the cereals, which include other plant model species such as rice (Oryza sativa), sorghum (Sorghum bicolor), wheat (Triticum spp.), and barley (Hordeum vulgare), maize is the most thoroughly researched genetic system. Several attributes of the maize plant, including a vast collection of mutant stocks, large heterochromatic chromosomes, extensive nucleotide diversity, and genic colinearity within related grasses, have positioned this species as a centerpiece for genetic, cytogenetic, and genomic research. As a model organism, maize is the subject of such far-ranging biological investigations as plant domestication, genome evolution, developmental physiology, epigenetics, pest resistance, heterosis, quantitative inheritance, and comparative genomics. These and other studies will be advanced by the completed sequencing and annotation of the maize gene space, which will be realized during 2009. Here we present an overview of the use of maize as a model system and provide links to several protocols that enable its genetic and genomic analysis.

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“…To conclude, we are currently fine mapping Sos1 to identify the gene using positional cloning (Bortiri et al, 2006b). Cloning the sos1 gene will elucidate the molecular basis for its interaction with the ramosa pathway.…”

Section: Does Auxin Play a Role In Sos1 Function?mentioning

confidence: 99%

suppressor of sessile spikelets1Functions in theramosaPathway Controlling Meristem Determinacy in Maize

Skirpan

McSteen

2008

Plant Physiology

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The spikelet, which is a short branch bearing the florets, is the fundamental unit of grass inflorescence architecture. In most grasses, spikelets are borne singly on the inflorescence. However, paired spikelets are characteristic of the Andropogoneae, a tribe of 1,000 species including maize (Zea mays). The Suppressor of sessile spikelets1 (Sos1) mutant of maize produces single instead of paired spikelets in the inflorescence. Therefore, the sos1 gene may have been involved in the evolution of paired spikelets. In this article, we show that Sos1 is a semidominant, antimorph mutation. Sos1 mutants have fewer branches and spikelets for two reasons: (1) fewer spikelet pair meristems are produced due to defects in inflorescence meristem size and (2) the spikelet pair meristems that are produced make one instead of two spikelet meristems. The interaction of Sos1 with the ramosa mutants, which produce more branches and spikelets, was investigated. The results show that Sos1 has an epistatic interaction with ramosa1 (ra1), a synergistic interaction with ra2, and an additive interaction with ra3. Moreover, ra1 mRNA levels are reduced in Sos1 mutants, while ra2 and ra3 mRNA levels are unaffected. Based on these genetic and expression studies, we propose that sos1 functions in the ra1 branch of the ramosa pathway controlling meristem determinacy.

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Advances in maize genomics: the emergence of positional cloning

Cited by 63 publications

References 50 publications

Quantitative Trait Loci and Crop Performance under Abiotic Stress: Where Do We Stand?: Table I.

Quantitative Trait Loci and Crop Performance under Abiotic Stress: Where Do We Stand?: Table I.

Maize (Zea mays): A Model Organism for Basic and Applied Research in Plant Biology

suppressor of sessile spikelets1Functions in theramosaPathway Controlling Meristem Determinacy in Maize

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