Maize diversity in southern Brazil: indication of a microcenter of Zea mays L.

Costa, Flaviane Malaquias; Silva, Natália Carolina de Almeida; Ogliari, Juliana Bernardi

doi:10.1007/s10722-016-0391-2

Cited by 31 publications

(28 citation statements)

References 37 publications

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“…A practical application for this research is to propose prospection plans and in situ conservation strategies for the traditional varieties that are still being grown. Also, local characterizations of maize diversity through census of diversity could be performed, which is perceived as a crucial step for strengthening on farm conservation strategies (2) . This paper contributes with a broader understanding of maize diversity in the Southern Cone and seeks to revalue micro-centres where traditional agriculture is still practiced.…”

Section: Discussionmentioning

confidence: 99%

“…Maize (Zea mays L.) is cultivated in almost every continent, showing specific adaptations to different climates and soils (1) (2) . In the Southern Cone (Argentina, Brazil, Bolivia, Chile, Paraguay and Uruguay) there is a wide variety of maize landraces (3)(4) that have been kept by small-scale farmers in traditional ways over the centuries (5) .…”

Section: Introductionmentioning

confidence: 99%

“…Recent studies with high sampling intensity in micro-regions in southern Brazil revealed a currently greater number of races of maize (5) (12) . Furthermore, the presence of wild relatives of maize in sympatric coexistence with landraces, along with the identification of new races (12) , has led to the indication of micro-centers of diversity (2) .…”

Section: Introductionmentioning

confidence: 99%

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Diversity of Maize Landraces in Germplasm Collections from South America

2020

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In the Southern Cone there is a wide variety of maize landraces kept by small-scale farmers, which are of interest for the development of the crop at a worldwide scale. The countries of this region hold important ex situ maize collections in national and international Germplasm Banks, from missions that took place before the generalization of hybrids and transgenic cultivars. In order to avoid losses of genetic diversity and to promote their use in breeding programs, it is essential that these collections are adequately known and conserved. The aim of this study was to map the geographic distribution of the collections of maize from Argentina, Bolivia, Brazil, Chile, Paraguay and Uruguay, and to analyze its diversity based on the variable kernel type.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Diversity of Maize Landraces in Germplasm Collections from South America

2020

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“…Through interviewing peasants, this methodology allowed for identifying, mapping and characterizing all the landraces of Zea mays subsp. mays L. Thus, the BC-ISOF database included the following information: identification of the landraces (name, cultivation time and risk factors of loss), morphological characteristics of the grain (type of endosperm, size and color), geographical location (municipality, community, longitude and latitude), and use values and conservation, organized into 13 categories (agronomic, gastronomic, animal feed, adaptive, aesthetic, economic, health, cultural, ornamental, crafts, conservation of diversity, nutritional and medicinal) defined by Costa et al (2016).…”

Section: Sample Universe: In Situ/on Farm Base Collectionmentioning

confidence: 99%

Old tools as new support for on farm conservation of different types of maize

Vidal

Silva

Ogliari

2020

Sci. agric. (Piracicaba, Braz.)

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A germplasm collection should represent the diversity of the target species and the gene pools associated with it. However, it is critical to establish collection plans which ensure such representativeness. At times it is difficult to identify the best strategy for collecting domesticated species that are conserved in situ/on farm, since, in general, the magnitude of the diversity existing in a geographical area was hitherto unknown. The Diversity Census methodology was developed for previous diagnosis of the diversity of Zea mays subsp. mays L., conserved by farmers in two municipalities in the far western region of the state of Santa Catarina, southern Brazil. The Diversity Census database allowed for the identification of the best strategy to collect different types of maize landraces. Thus, tests were carried out using two methods described for Core Collections (Modified Random Sampling and Maximization) and a third statistical method for random sampling, stratified by farm area. The Maximization method enabled the capture of all the morphological variation of the traits evaluated in the Diversity Census from the smallest sample size. The relevance of this result is the feasibility of adapting the Core Collection strategy in order to plan more efficient expeditions to collect maize landraces conserved in microregions. Such planning allows for organizing the collection work efficiently, reducing costs, simplifying the work of characterization and helping to plan integrated strategies of in situ/on fam conservation.

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“…A microrregião do EOSC, representada neste trabalho pelos municípios de Anchieta e Guaraciaba, tem sido apon-tada como detentora de uma significativa diversidade de variedades locais de milho (ALMEIDA SILVA et al, 2015;COSTA et al, 2016); quanto ao arroz, Fonseca & Vieira (2001) e Gonçalves et al (2013) já relataram a presença e caracterizaram algumas populações de variedades coletadas na região. Entre os acessos pertencentes à coleção nuclear de arroz da Embrapa, 15 foram coletados em Santa Catarina, dentre os quais cinco correspondem a variedades de sequeiro coletadas no Oeste catarinense (COLEÇÕES…, 2014).…”

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