The Origin and Evolution of Maize

Mangelsdorf, Paul C.

doi:10.1016/s0065-2660(08)60486-1

Cited by 58 publications

(33 citation statements)

References 40 publications

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“…Some authors (20)(21)(22) reported that none of the key traits segregate in simple Mendelian ratios in a maize-teosinte F2, agreeing with our results that the traits are under multigenic control. Conversely, Langham (11) concluded that paired spikelets and rank are each controlled by a single Mendelian locus.…”

Section: Methodssupporting

confidence: 92%

Genetic and morphological analysis of a maize-teosinte F2 population: implications for the origin of maize.

Doebley

Stec

Wendel

et al. 1990

Proc. Natl. Acad. Sci. U.S.A.

289

152

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Genes controlling the dramatic morphological differences between maize and its presumed progenitor (teosinte) were investigated in a maize-teosinte F2 population through the use of molecular markers. Results indicate that the key traits differentiating maize and teosinte are each under multigenic control, although for some traits, such as the number of ranks of cupules, the data are consistent with a mode of inheritance that would involve a single major locus plus several modifiers. For other traits, such as the presence/absence of the pedicellate spikelet, the data indicate multigenic inheritance with no single locus having a dramatically larger effect than the others. Results also indicate that the tunicate locus (Tu) had no major role in the origin of maize, despite previous opinion that it was involved. The major loci affecting the morphological differences between maize and teosinte are located on the first four chromosomes. The data suggest that the differences between teosinte and maize involve, in part, developmental modifications that enable (i) primary lateral inflorescences, which are programmed to develop into tassels (male) in teosinte, to become ears (female) in maize, and (ii) the expression of male secondary sex traits on a female background in maize. Similar changes were likely involved in the origin of maize.

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Section: Methodssupporting

confidence: 92%

Genetic and morphological analysis of a maize-teosinte F2 population: implications for the origin of maize.

Doebley

Stec

Wendel

et al. 1990

Proc. Natl. Acad. Sci. U.S.A.

289

152

View full text Add to dashboard Cite

show abstract

“…Even traits shown to be controlled by a single Mendelian locus in some studies, such as paired vs. and teosinte as quantitative (Mangelsdorf, 1947;Rogers, 1950a,b;Collins and Kempton, 1920), the 166 other half as Mendelian (Langham, 1940;Galinat, 1971Galinat, , 1988 yielded ears looking like either the maize or teosinte parent (Beadle, 1972(Beadle, , 1980. This reduced the 185 number of genes involved to between four and five, similar to that suggested by Langham (1940).…”

mentioning

confidence: 99%

Maize domestication and gene interaction

Stitzer

Ross‐Ibarra

2018

Preprint

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9The process of domestication presents a tractable system for following evolutionary change, 10 as selective pressures shift, resulting in adaptation to the new ecological niche of cultivation. 11Perhaps the most detailed understanding of this process comes from Zea mays, where mor-12 phological, genetic, and genomic studies have elucidated the ancestry and selection that trans-13 formed a wild plant, the teosinte Zea mays subsp. parviglumis, into the domesticated maize 14 Zea mays subsp. mays. These studies have identified five major morphological differences 15 that distinguish these two subspecies, and careful genetic dissection of these phenotypes has

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“…T HE Tripsacum and Zea genera are sister taxa that share many morphological features as well as common elements of their genomes (Mangelsdorf 1947;Dennis and Peacock 1984;Galinat 1988;Meyers et al 2001). Their genomes are also similar in their gene density; both contain abundant LTR-type retroelements in contrast to a slightly more distantly related genus, Sorghum, which has a more compact, gene-rich, genome (Gaut et al 2000).…”

mentioning

confidence: 99%

Retroelement Genome Painting: Cytological Visualization of Retroelement Expansions in the Genera Zea and Tripsacum

Lamb

Birchler

2006

Genetics

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Divergence of abundant genomic elements among the Zea and Tripsacum genera was examined cytologically and a tool kit established for subsequent studies. The LTR regions from the CRM, Huck, Grande, Prem1, Prem2/Ji, Opie, Cinful-1, and Tekay retroelement families were used as FISH probes on mitotic chromosome spreads from a ''trispecies'' hybrid containing chromosomes from each of three species: Zea mays (2n ¼ 20), Z. diploperennis (2n ¼ 20), and Tripsacum dactyloides (2n ¼ 36). Except for Tekay, which painted both Zea and Tripsacum chromosomes with nearly equal intensity, the retroelement probes hybridized strongly to the Zea chromosomes, allowing them to be distinguished from those of Tripsacum. Huck and Grande hybridized more intensely to maize than to Z. diploperennis chromosomes. Tripsacum genomic clones containing retroelement sequences were isolated that specifically paint Tripsacum chromosomes. The retroelement paints proved effective for distinguishing different genomes in interspecific hybrids and visualizing alien chromatin from T. dactyloides introgressed into maize lines. Other FISH probes (180-bp knob, TR-1, 5S, NOR, Cent4, CentC, rp1, rp3, and a-ZeinA) could be simultaneously visualized with the retroelement probes, emphasizing the value of the retroelement probes for cytogenetic studies of Zea and Tripsacum.

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The Origin and Evolution of Maize

Cited by 58 publications

References 40 publications

Genetic and morphological analysis of a maize-teosinte F2 population: implications for the origin of maize.

Genetic and morphological analysis of a maize-teosinte F2 population: implications for the origin of maize.

Maize domestication and gene interaction

Retroelement Genome Painting: Cytological Visualization of Retroelement Expansions in the Genera Zea and Tripsacum

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