Descriptors for Mangaba (Hancornia speciosa Gomes)

The ‘Descriptors for Mangaba (Hancornia speciosa Gomes)’ were developed by the Embrapa Tabuleiros Costeiros and a group of researchers from three research centres of the Brazilian Agricultural Research Corporation (Embrapa). Mangaba is a native fruit species of Brazil, but also occurs in Paraguay, Bolivia and Peru. The genus is monotypic, and there are six botanical varieties. H. speciosa var. speciosa is the most widely distributed occurring in the Cerrado, coastal tablelands and lowlands of Brazil. This neglected species, is considered one of the "Plants of the Future", a group of plants with a high priority for conservation, research and development in Brazil. Research on the genetic resources of underutilized native tropical species has been one of the main objectives of Bioversity International and Embrapa, and this list for mangaba contributes greatly to its characterization and, consequently, conservation and use activities. This document is a first approach for the definition of a descriptors list, aiming at supporting studies focusing on documenting characterization and evaluation traits and conserving its genetic resources, and, mainly, increasing production and use of nutritious mangaba products

Descriptors for Mangaba (Hancornia speciosa Gomes)

The ‘Descriptors for Mangaba (Hancornia speciosa Gomes)’ were developed by the Embrapa Tabuleiros Costeiros and a group of researchers from three research centres of the Brazilian Agricultural Research Corporation (Embrapa). Mangaba is a native fruit species of Brazil, but also occurs in Paraguay, Bolivia and Peru. The genus is monotypic, and there are six botanical varieties. H. speciosa var. speciosa is the most widely distributed occurring in the Cerrado, coastal tablelands and lowlands of Brazil. This neglected species, is considered one of the "Plants of the Future", a group of plants with a high priority for conservation, research and development in Brazil. Research on the genetic resources of underutilized native tropical species has been one of the main objectives of Bioversity International and Embrapa, and this list for mangaba contributes greatly to its characterization and, consequently, conservation and use activities. This document is a first approach for the definition of a descriptors list, aiming at supporting studies focusing on documenting characterization and evaluation traits and conserving its genetic resources, and, mainly, increasing production and use of nutritious mangaba products.Peer Revie

Estimativas de parâmetros genéticos e ganho de seleção para produção de frutos em progênies de polinização aberta de pupunheira no estado do Pará, Brasil

O estudo objetivou estimar parâmetros e valores genéticos para os caracteres número de cachos (NC), peso médio do cacho (PMC) e peso total do cacho (PTC) aos seis anos, pelo método de modelos mistos (REML/BLUP). O teste de progênies foi estabelecido sob o delineamento de blocos ao acaso com 50 tratamentos (progênies), 10 blocos e uma planta por parcela, no espaçamento de 5 x 5 m, além de uma bordadura externa ao experimento. As estimativas de herdabilidade individual e médias no sentido restrito para PTC (0,213 e 0,360) e NC (0,286 e 0,435), respectivamente, foram de boas magnitudes. O coeficiente de variação genética individual exibiu valores elevados para PTC (19,86) e NC (17,59). A raiz quadrada da herdabilidade ao nível de médias das progênies resulta em acurácia seletiva na ordem de 0,60 para PTC e 0,66 para NC, atestando boa precisão e confiança nos parâmetros genéticos estimados, promovendo segurança na seleção. O potencial da população para fins de melhoramento pode ser observado por meio dos ganhos genéticos para PTC, que oscilaram de 8,3 a 19,9 kg, elevando a nova média populacional para o caráter após um ciclo de seleção, para 40,4 kg, equivalente a 25,8%