Taxonomy of Zea (Gramineae). I. A Subgeneric Classification With Key to Taxa

Doebley, John; Iltis, Hugh H.

doi:10.1002/j.1537-2197.1980.tb07730.x

Cited by 117 publications

(23 citation statements)

References 26 publications

(26 reference statements)

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“…mays (Tz12,Tz13 and Tz14). The results were generally consistent with the opinion that the genus Zea was divided into sections Luxuriantes and Zea according to Dobeley et al [1] and Iltis et al [2]. The new teosinte Z. nicaraguensis was classified into the first major cluster and thus considered to be a section Luxuriantes species.…”

Section: Resultssupporting

confidence: 89%

“…The subgeneric boundaries of Zea proposed by Doebley and Iltis [1], [2] are well defined on UPGMA-based dendrogram derived from RAPD analysis (Figure 2). The members of each section share a suite of morphological and genetic features [3].…”

Section: Discussionmentioning

confidence: 79%

“…The genus Zea has been classified into two sections [1], [2], section Luxuriantes , which is composed of Zea diploperennis , Zea luxurians and Zea perennis , and section Zea , which contains four subspecies: Zea mays ssp. mays , Zea mays ssp.…”

Section: Introductionmentioning

confidence: 99%

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RAPD and Internal Transcribed Spacer Sequence Analyses Reveal Zea nicaraguensis as a Section Luxuriantes Species Close to Zea luxurians

Wang

Zheng

et al. 2011

PLoS ONE

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Genetic relationship of a newly discovered teosinte from Nicaragua, Zea nicaraguensis with waterlogging tolerance, was determined based on randomly amplified polymorphic DNA (RAPD) markers and the internal transcribed spacer (ITS) sequences of nuclear ribosomal DNA using 14 accessions from Zea species. RAPD analysis showed that a total of 5,303 fragments were produced by 136 random decamer primers, of which 84.86% bands were polymorphic. RAPD-based UPGMA analysis demonstrated that the genus Zea can be divided into section Luxuriantes including Zea diploperennis, Zea luxurians, Zea perennis and Zea nicaraguensis, and section Zea including Zea mays ssp. mexicana, Zea mays ssp. parviglumis, Zea mays ssp. huehuetenangensis and Zea mays ssp. mays. ITS sequence analysis showed the lengths of the entire ITS region of the 14 taxa in Zea varied from 597 to 605 bp. The average GC content was 67.8%. In addition to the insertion/deletions, 78 variable sites were recorded in the total ITS region with 47 in ITS1, 5 in 5.8S, and 26 in ITS2. Sequences of these taxa were analyzed with neighbor-joining (NJ) and maximum parsimony (MP) methods to construct the phylogenetic trees, selecting Tripsacum dactyloides L. as the outgroup. The phylogenetic relationships of Zea species inferred from the ITS sequences are highly concordant with the RAPD evidence that resolved two major subgenus clades. Both RAPD and ITS sequence analyses indicate that Zea nicaraguensis is more closely related to Zea luxurians than the other teosintes and cultivated maize, which should be regarded as a section Luxuriantes species.

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Section: Resultssupporting

confidence: 89%

Section: Discussionmentioning

confidence: 79%

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RAPD and Internal Transcribed Spacer Sequence Analyses Reveal Zea nicaraguensis as a Section Luxuriantes Species Close to Zea luxurians

Wang

Zheng

et al. 2011

PLoS ONE

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“…Using a sample of 237 teosinte plants from all species and subspecies, and encompassing the geographic range from northwestern Mexico to Nicaragua, as well as two individual Tripsacum plants as their outgroup (one each of T. zopilotense and T. peruvianum ), Fukunaga et al [3] analyzed the allelic diversity in the same (or similar) set of microsatellites (SSRs) as used in the two maize studies. Their results confirm that across a broad set of SSRs, the teosintes can be divided into the two sections previously suggested by Doebley and Iltis [1]. They suggest that Z. luxurians is either ancestral to section Zea, or, more likely, the root lies somewhere between (i.e., ancestral to both) sections Zea and Luxuriantes (Figure 1).…”

Section: Introductionsupporting

confidence: 85%

“…Doebley and Iltis [1] and Iltis and Doebley [2] provided the current taxonomy of Zea , which they divide into two sections (also see [3]). Section Zea includes the annual teosintes Z mays ssp.…”

Section: Introductionmentioning

confidence: 99%

Teosinte Inflorescence Phytolith Assemblages Mirror Zea Taxonomy

et al. 2011

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Molecular DNA analyses of the New World grass (Poaceae) genus Zea, comprising five species, has resolved taxonomic issues including the most likely teosinte progenitor (Zea mays ssp. parviglumis) of maize (Zea mays ssp. mays). However, archaeologically, little is known about the use of teosinte by humans both prior to and after the domestication of maize. One potential line of evidence to explore these relationships is opaline phytoliths produced in teosinte fruit cases. Here we use multidimensional scaling and multiple discriminant analyses to determine if rondel phytolith assemblages from teosinte fruitcases reflect teosinte taxonomy. Our results indicate that rondel phytolith assemblages from the various taxa, including subspecies, can be statistically discriminated. This indicates that it will be possible to investigate the archaeological histories of teosinte use pending the recovery of appropriate samples.

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Zea Mays(Maize, Corn)

Vincent

2012

Encyclopedia of Life Sciences

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Zea mays L. (maize, corn) is a member of the grass family (Poaceae). It has been an important food crop since ancient times, especially among the peoples of Central and South America. Although most grasses have bisexual florets the mature florets of Z. mays are functionally unisexual on the sample plant, a condition referred to as monoecy. The functionally male florets are borne on the tassel whereas the functionally female florets are borne on the ear. All of the components of the adult Z. mays plant are initiated within the first 4 weeks after germination. Research on maize genetics has led to some exciting discoveries (some associated with the award of a Nobel prize). These discoveries have clarified the putative origin and biology of Z. mays and have also provided significant insights for plant biology as a whole. An overview of the taxonomy of Z. mays is provided. Key Concepts: The species, Zea mays L. (maize/corn), is a member of the grass family (Poaceae) and a member of the genus Zea . Taxonomically and nomenclaturally maize is known as Z. mays L. ssp. mays . Maize is considered to have evolved from the Mexican annual teosintes ( Z. mays ssp. parviglumis and ssp. mexicana ). A large number of exciting genetic discoveries originated from the research on maize. One of these discoveries, the phenomenon of transposable elements, resulted in the awarding of a Nobel prize. The flowers of Z. mays , typically referred to as florets, are initially bisexual but before the florets are reproductively functional they become unisexual, resulting in monoecy. The functionally male florets are borne terminally on the plant in the tassel. The functionally female florets are borne laterally on the plant in one or more ears. The occurrence of separate male and female florets in separate flowering structures (inflorescences) on the Z. mays plant (monoecy) has enabled the genetics of this species to be extensively studied because controlled pollinations are relatively easily performed. The morphological structure of the very young florets in Z. mays is typical of the florets in the grass family (Poaceae) in that each floret is subtended by a lemma and a palea. Pairs of florets form spikelets. In the tassel, both florets in each spikelet are functionally male and produce pollen. In the ear one of the two florets in each spikelet aborts. The remaining floret results in a kernel following successful pollination and fertilisation.

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Taxonomy of Zea (Gramineae). I. A Subgeneric Classification With Key to Taxa

Cited by 117 publications

References 26 publications

RAPD and Internal Transcribed Spacer Sequence Analyses Reveal Zea nicaraguensis as a Section Luxuriantes Species Close to Zea luxurians

RAPD and Internal Transcribed Spacer Sequence Analyses Reveal Zea nicaraguensis as a Section Luxuriantes Species Close to Zea luxurians

Teosinte Inflorescence Phytolith Assemblages Mirror Zea Taxonomy

Zea Mays(Maize, Corn)

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