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EVALUATION OF MAIZE LAND RACES ACCESSION COLLECTED IN THE CENTRAL REGION OF BRAZIL

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Author(s): RAMIRO VILELA DE ANDRADE | MANOEL XAVIER DOS SANTOS | ALEXANDRE DA SILVA FERREIRA | ANTÔNIO CARLOS DE OLIVEIRA

Journal: Revista Brasileira de Milho e Sorgo
ISSN 1676-689X

Volume: 1;
Issue: 2;
Start page: 67;
Date: 2002;
Original page

Keywords: Germplasm | Zea mays L. | characterization | endosperm type | clusters

ABSTRACT
The Brazilian maize germplasm collection is one of the greatest in the worldwith 3,816 accessions preserved in the Active Maize Germplasm Bank of Embrapa Maize andSorghum Research Center in Sete Lagoas, Minas Gerais, Brazil. One of the main reasons that difficult its use is the lack of information about this germplasm . To increase the amount and thequality of germplasm information, the Embrapa Maize and Sorghum Research Center has beendoing a continuous work to characterize and evaluate this maize collection. Within this scope,in 1984, it was published the first catalogue of maize germplasm with 26 descriptors of 282accessions. In 1986 it was initiated of the program “Latin American of Maize” ( LAMP ) tocharacterize and evaluate the maize germplasm. At that time, 1,715 accessions from Brazilwere characterized and evaluated using three geographic regions which resulted in the publicationof a catalogue. In 1996, a new LAMP program began ( LAMP II) with the objective ofcharacterizing and evaluating other maize germplasm not considered in the first stage. So , inthe 1988/89 season year was established in Sete Lagoas, Minas Gerais, one experiment using324 accessions of land race germplasm, mostly collected in central Brazil. The experimentaldesign was a 9x9 lattice with four trials and one check within blocks with two replications. Thehomogeneous groups were classified according to their endosperm type ( sweet, floury, pop,dent, semident, flint and semiflint). The dissimilarities among groups were determined using theEuclidean average distance method , according to the characteristics of male and femaleflowering, plant height, ear height, stalk and root lodging, final stand, prolificity, ear weight, andgrain weight. The results showed high phenotipic variation among accessions for all characteristics,and based on that, it was possible to select accessions to improve intrapopulation varieties andcomposites formation.
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