Molecular characterization of maize landraces and various subspecies of teosinte from Mexico and Central America
Material type:
TextPublication details: 2007Description: p. 13Summary: Teosinte (Zea sp.) are the closest wild related species to maize, (Zea mays mays) and contains the progenitor of domesticated maize, (Zea mays ssp. parviglumus). This study was undertaken to compare the diversity of SSR markers in 20 teosinte subspecies with the diversity of 10 maize landraces from the same countries and 10 maize landraces from geographical regions who have been separated from the center of origin of maize for several centuries. The teosinte relationships shown in this study agreed with previously published results based on markers, morphology, and geography, with the addition of some subspecies not previously studied. The diversity within the cultivated maize landraces is extensive, even compared to the diversity in the wild species. Of a total of 386 alleles identified in the data set, 138 (36%) were unique to the teosinte species, and 38 (1%) were unique to the maize. Of these, 33 alleles were present only in the Asian maize, and only 5 were present in both Asian and Latin American maize landraces. The search for unique alleles in maize populations that are sympatric to teosinte accessions indicate the probability of diversity in maize being influenced by gene flow directly from wild maize subspecies.
| Item type | Current library | Collection | Call number | Copy number | Status | Date due | Barcode | Item holds | |
|---|---|---|---|---|---|---|---|---|---|
| Conference proceedings | CIMMYT Knowledge Center: John Woolston Library | CIMMYT Staff Publications Collection | CIS-5219 (Browse shelf(Opens below)) | 1 | Available | 635088 |
Abstract only
Teosinte (Zea sp.) are the closest wild related species to maize, (Zea mays mays) and contains the progenitor of domesticated maize, (Zea mays ssp. parviglumus). This study was undertaken to compare the diversity of SSR markers in 20 teosinte subspecies with the diversity of 10 maize landraces from the same countries and 10 maize landraces from geographical regions who have been separated from the center of origin of maize for several centuries. The teosinte relationships shown in this study agreed with previously published results based on markers, morphology, and geography, with the addition of some subspecies not previously studied. The diversity within the cultivated maize landraces is extensive, even compared to the diversity in the wild species. Of a total of 386 alleles identified in the data set, 138 (36%) were unique to the teosinte species, and 38 (1%) were unique to the maize. Of these, 33 alleles were present only in the Asian maize, and only 5 were present in both Asian and Latin American maize landraces. The search for unique alleles in maize populations that are sympatric to teosinte accessions indicate the probability of diversity in maize being influenced by gene flow directly from wild maize subspecies.
Genetic Resources Program|Global Wheat Program|Global Maize Program
English
Lucia Segura
INT2692|INT3287|CBED01|INT3057
CIMMYT Staff Publications Collection
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