Please use this identifier to cite or link to this item: http://www.alice.cnptia.embrapa.br/alice/handle/doc/474567
Research center of Embrapa/Collection: Embrapa Milho e Sorgo - Artigo em periódico indexado (ALICE)
Date Issued: 1994
Type of Material: Artigo em periódico indexado (ALICE)
Authors: SANTOS, M. X. dos
PACHECO, C. A. P.
GUIMARAES, P. E. O.
GAMA, E. E. G. e
SILVA, A. E. da
OLIVEIRA, A. C. de
Additional Information: EMBRAPA-CNPMS.; PAULO EVARISTO DE O GUIMARAES, CNPMS; ANTONIO CARLOS DE OLIVEIRA, CNPMS.
Title: Diallel among twenty eight varieties of maize.
Publisher: Revista Brasileira de Genética, Ribeirão Preto, v. 17, n. 3, p. 277-282, 1994.
Language: en
Keywords: Heterose
Maize
Improvement.
Description: Twenty eight varieties of maize of different maturities and types of endosperm were assessed together with 378 F1, and seven commercial hybrids (controls) in three locations: Sete Lagoas, MG, Goiania, GO, and Londrina, PR. The varieties represent germplasms adapted to different areas of Brazil, used in the breeding program at the National Maize and Sorghum Research Center at Sete Lagoas, MG. The joint analysis of variance for ear weight showed significance (P < 0,01) for environments, entries, varieties, heterosis, mean heterosis, variety heterosis, specific heterosis, environments x entries and environments x varieties. The average yield of the varieties varied from 2,322 to 7,704kg/ha, while for the intervarietal hybrids the variation was from 4,112 to 8,363 kg/ha. The mean heterosis was 489 kg/ha and the vrietal heterosis varied from 589 to 1,339 kg/ha. The highest specific heterosis was obtained for the BR 105 x BA III - Tuson crossing. Some intervarietal hybrids were higher yielding than the best control. This is promising for breeding purposes, since new synthetic varieties can be formed or used to begin programs to produce hybrids. No association was found between heterosis and endosperm type.
Thesagro: Milho
Melhoramento
Variedade
Zea Mays.
NAL Thesaurus: corn
breeding
Brazil
heterosis
varieties.
Data Created: 1997-03-07
Appears in Collections:Artigo em periódico indexado (CNPMS)

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