Performance of soybean genotypes in the Amapá savannah between 2009-2013

• Autor(a) principal: Yokomizo, Gilberto Ken-Iti
• Data de Publicação: 2018
• Outros Autores: Santos, Igor Correa dos
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Revista de Ciências Agrárias (Belém. Online)
• Texto Completo: https://ajaes.ufra.edu.br/index.php/ajaes/article/view/2395
• topic: Glycine max; Yield; Genetic breeding; Scott-Knott; Glycine max; Produtividade; Melhoramento genético; Scott-Knott

The soybean has occupied new agricultural frontiers, initially appearing in savannah areas in the north of the country, including Amapá, which has a strategic location, so it is essential that the research identifies and selects the best materials for local use. Thus, Embrapa Amapá conducted a research with 26 cultivars and 41 lineages in its experimental area between 2008 and 2013, being evaluated: number of days to flowering (NDF), number of days to maturity (NDM), plant height at maturity (APM in cm), and grain yield (PG, in kg ha-1). The results show that differences between the years of evaluation, genotypes and interaction were found between them; the coefficient CVg/CVe indicates there is ease of selection based only on NDFs, considering that the other characteristics need more refined statistical methodologies. The Scott-Knott classification divided the genetic material into groups, for grain yield, the top ten experimental lineages were: MABR03-3545, MABR05- 22940, BRN03-5602, BRN03-7183, MABR05-24513, MABR04-52667, MABR05-24540, MABR02-1876, BRN03-5760, BR04-5290, and the commercial cultivars were: BRS Candeia, BRS Candeia VNH, BRS Seridó VNH, and BRS 219; the correlation between productivity and plant height was higher, which means that the selection of one of these characteristics will hardly be obtained independent of one another; regarding the other correlations, which involved only the number of days to flowering and maturity with plant height, they were low, so these characteristics are practically independent.