EVALUATION AND CHARACTERIZATION OF PORTUGUESE MAIZE LANDRACES. ENHANCING GENETIC DIVERSITY

André Pereira; Pedro Mendes-Moreira; Ana Luiza Bilro Neri; Manuela Veloso

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Trabalho

Título do Trabalho

EVALUATION AND CHARACTERIZATION OF PORTUGUESE MAIZE LANDRACES. ENHANCING GENETIC DIVERSITY

Autores

André Pereira
Pedro Mendes-Moreira
Ana Luiza Bilro Neri
Manuela Veloso

Modalidade

Resumo

Área temática

Recursos Genéticos

Data de Publicação

16/02/2022

País da Publicação

Brasil

Idioma da Publicação

Inglês

Página do Trabalho

https://www.even3.com.br/anais/cbmp2021/418613-evaluation-and-characterization-of-portuguese-maize-landraces-enhancing-genetic-diversity

ISBN

978-65-5941-579-3

Palavras-Chave

Germplasm.; Maize Landraces; Characterization; Evaluation.

Resumo

For centuries maize adaptation and selection evolved towards location, climate and farmer´s choices. This process resulted in large number of Landraces perfectly adapted to a wide range of ecosystems and traditions. With the emergence of hybrids, the maize Landraces were systematically neglected and underutilized, resulting in loss of genetic diversity. The Participatory Plant Breeding Program “VASO” (Sousa Valley in Portugal) started in the 80s with the purpose of valorizing Portuguese maize Landraces for farmer’s needs, that included the use of maize for maize bread. ESAC-IPC (Escola Superior Agrária de Coimbra) supported by ADERSOUSA carry on the “VASO” PPB work with farmers and stakeholders from Sousa Valley, ensured seed multiplication and tested the agronomic potential of the maize Landraces derived from PPB "VASO" to meet the needs of sustainable agriculture in the context of climate change. The study aims to: phenotypically characterize, test the agronomic behavior and adaptation of the Landraces and CCPs in farmers conditions (Macieira de Lixa and Lousada) and in a low input organic system (Coimbra). The germplasm used included 10 maize Landraces: 8 open- pollinated populations, 1 composite cross population (CCP) derived from PPB "VASO", and 1 CCP (BulkAzores2) created in 2019 at ESAC from 40 maize populations from Azores, that were obtained in a collecting mission in 1979, kept ex-situ in BPGV (Banco Português de Germoplasma Vegetal) until 2018, then multiplied at ESAC low input organic field. (Bettencourt and Gusmão, 1982; Mendes-Moreira et al, 2017). Registered data included Grain yield and Phenotypic evaluations using HUNTERS descriptor (Plant Height, Uniformity, Leaf aNgle, Tassel, Ear placement, Root and Stalk lodging) The trials followed the randomized complete block design with three replications in three locations: Coimbra, Macieira de Lixa and Lousada, the last two in Sousa Valley region. Data treatment followed ANOVA. Grain yield ranged from 2,1 Mg/ha to 10,5 Mg/ha, with significant higher values in Macieira de Lixa. The CCP BulkAzores2 achieved yield stability across environments, indicating that heterogeneous populations had potential to buffer the environment effect. In addition, the tested populations showed significant phenotypic differences among populations for Plant Height, Ear placement and Stalk lodging, unveiling diversity and breeding potential to adapt to sustainable agriculture and to low input marginal areas, where the use of heterogeneous populations can extend the network of suitable maize environments.

Título do Evento: 11º Congresso Brasileiro de Melhoramento de Plantas
Título dos Anais do Evento: Anais 11º Congresso Brasileiro de Melhoramento de Plantas.
Nome da Editora: Even3
Meio de Divulgação: Meio Digital

Como citar

PEREIRA, André et al.. EVALUATION AND CHARACTERIZATION OF PORTUGUESE MAIZE LANDRACES. ENHANCING GENETIC DIVERSITY.. In: Anais 11º Congresso Brasileiro de Melhoramento de Plantas.. Anais...Pelotas(RS) UFPel, 2021. Disponível em: https//www.even3.com.br/anais/cbmp2021/418613-EVALUATION-AND-CHARACTERIZATION-OF-PORTUGUESE-MAIZE-LANDRACES-ENHANCING-GENETIC-DIVERSITY. Acesso em: 18/07/2025