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MAIZE GERMPLASM DIVERSITY FROM NORTHESTERN REGION OF BRAZIL

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Author(s): FLAVIA FRANÇA TEIXEIRA | RAMIRO VILIELA DE ANDRADE | ANTONIO CARLOS DE OLIVEIRA | ALEXANDRE DA SILVA FERREIRA | MANOEL XAVIER DOS SANTOS

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

Volume: 1;
Issue: 3;
Start page: 59;
Date: 2002;
Original page

Keywords: Zea mays | pre-breeding | genetic resources

ABSTRACT
Breeders in Brazil do not use the germplasm frequently due to several factors,including the lack of information about the accesses which , when available, are inadequate orinsufficient. This research aims at estimating the genetic divergence of 169 accessions ofgermplasm evaluated at The Second Latin American Maize Project (LAMP II) in Janauba-MG using fifteen morfological characters. These characters were used to estimate the geneticdistance between the accessions and to form clusters for each grain type. The accessionsCE004 and CE001 with flint grains and the AL014 and PE007 with dent grains together withthe check, BR5011, reached the highest yield. All the germplasm evaluated showed differences,so it was possible to identify germplasm with special characters usually required by the plantbreeding and the difference between the accessions was useful to evaluate the divergencebetween the accesses and to cluster them. The flint group was the most divergent followed by the semident, floury and dent groups. The accessions BA233 and CE017 were the mostdivergent in the flint grain group, the MA012 was the most divergent in dent grain and theCE027 was the most divergent in floury grain. The group with semident grains was divided intwo: one of the subgroups held the accessions AL024, BA207, BA220, CE001, BA211,RN007, PE045 and PE032 and the other one held the others.
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