Heritable Characters in Maize

Phipps, I. F.

doi:10.1093/oxfordjournals.jhered.a103030

“…Maize's rich history as a genetic research organism includes classical inflorescence mutants that were identified and preserved by researchers from the turn and the early part of the 20th century [34][35][36][37][38][39][40][41]. Forward-genetic analysis of inflorescence architecture may be a useful route to identifying these genes of minor effect that were targets of selection, when the efforts focus on genes that affect inflorescence characters known or predicted to have been under selection (Maize Inflorescence Project: http://www.maizegdb.org/ mip/).…”

Section: The Maize Inflorescencementioning

confidence: 99%

Amazing grass: developmental genetics of maize domestication

Vollbrecht¹,

Sigmon²

2005

Biochem. Soc. Trans

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Crop plants were domesticated by prehistoric farmers through artificial selection to provide a means of feeding the human population. This article discusses the developmental genetics of crop domestication and improvement, including the historical framework and recent approaches in maize and other grasses. In many cases, selecting for a plant form that correlates with productivity involves controlling meristem activity. In the domestication of modern maize from its progenitor Zea mays ssp. parviglumis, QTL (quantitative trait loci) mapping, genetics and population genomics approaches have identified several genes that contain signatures of selection. Only a few genes involved in the derivation of the highly productive maize ear have been identified, including teosinte glume architecture1 and ramosa1. Future prospects hinge on forward and reverse genetics, as well as on other approaches from the developing discipline of evo-devo (evolutionary developmental biology).

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“…Work over the last few years with maize mutants exemplifies this approach. Maize's rich history as a genetic research organism includes classical inflorescence mutants that were identified and preserved by researchers from the turn and the early part of the 20th century [34][35][36][37][38][39][40][41]. At this time, some mutants were considered separate species or revertant evolutionary throwbacks because of morphological similarities to undomesticated grasses, and common ancestry of maize and teosinte, based on comparative morphology, was already favoured, although not without dissent [42,43].…”

Section: The Maize Inflorescencementioning

confidence: 99%

Amazing grass: developmental genetics of maize domestication

Vollbrecht

¹

,

Sigmon

²

2005

Biochemical Society Transactions

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Crop plants were domesticated by prehistoric farmers through artificial selection to provide a means of feeding the human population. This article discusses the developmental genetics of crop domestication and improvement, including the historical framework and recent approaches in maize and other grasses. In many cases, selecting for a plant form that correlates with productivity involves controlling meristem activity. In the domestication of modern maize from its progenitor Zea mays ssp. parviglumis, QTL (quantitative trait loci) mapping, genetics and population genomics approaches have identified several genes that contain signatures of selection. Only a few genes involved in the derivation of the highly productive maize ear have been identified, including teosinte glume architecture1 and ramosa1. Future prospects hinge on forward and reverse genetics, as well as on other approaches from the developing discipline of evo-devo (evolutionary developmental biology).

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“…In combination with tsl, male florets are seen at the tip of the main spike but are not as numerous as in the single mutant line. Ts5/+; Tu/+ mutants exhibit predominantly female florets with a few male florets scattered throughout ( ts4,TsG:Tu interactions ts4 and Ts6 are recessive and dominant mutations, respectively, that result in a proliferation of floral organs on both the tassel and ear (Nickerson and Dale, 1955;Phipps, 1928). In combination with Tu, Ts6 tassels appear highly branched and sterile.…”

Section: Tassel Seed:tu Interactionsmentioning

confidence: 99%

Action of the Tunicate locus on maize floral development

Langdale

¹

,

Irish

²

,

Nelson

³

1994

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The co-dominant Tunicate (Tu) mutation in maize causes nonreproductive structures in both the male and female inflorescences to be enlarged. This mutation also affects sex determination, permitting the development of pistils in the normally staminate tassel. In order to characterize the role of the normal fu gene product, we have analysed genetic interaction between Tu and other mutations that perturb specific stages of floral development. Synergistic interactions observed suggested that the tu product functions in at least three stages of flora I develop men t-deter mi nation of spikelet primordia, differentiation of non-reproductive organs and pistil abortion in the tassel.

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Heritable Characters in Maize

Cited by 25 publications

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Amazing grass: developmental genetics of maize domestication

Amazing grass: developmental genetics of maize domestication

Amazing grass: developmental genetics of maize domestication

Action of the Tunicate locus on maize floral development

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