Inbreeding depression and genetic variability of populations for green maize production
AUTOR(ES)
Cascão, Luma Mariano; Santana, Priscilla Neves de; Costa, Nayana Valéria; Crispim Filho, Ailton José; Resende, Marcela Pedroso Mendes; Melo, Patrícia Guimarães Santos
FONTE
Revista Ceres
DATA DE PUBLICAÇÃO
2022
RESUMO
ABSTRACT The production of green maize is considerable important for various regions of Brazil. It is vital that breeding programs of public institutions seek to meet the needs of this market sector, which has a relevant social role, mainly on small properties. The aim of this study was to estimate the inbreeding depression and the genetic components (m + a and d) of characters associated with green maize production and quality in three populations of different genetic basis: the variety UFG-Samambaia (P1), and two populations formed by crossing the commercial hybrids (P2 e P3). The S1 progenies of each population, the three S0 populations, and two checks were evaluated in a 14 × 14 triple lattice design. Agronomic and ear quality traits were evaluated. Genetic variability and greater inbreeding depression were observed for most of the traits among the P1 progenies. In P2 and P3, greater inbreeding depression was observed for male flowering, ear weight without straw, ear diameter, ear weight, female flowering, breakage and lodging, and grain color. The traits of ear quality, important for green maize production, had greater inbreeding depression than the agronomic traits, indicating that inbreeding depression and exploitation of heterosis should be considered in the selection process for these traits.
Documentos Relacionados
- Genetic Adaptation to Captivity and Inbreeding Depression in Small Laboratory Populations of Drosophila Melanogaster
- Variabilidade genética em progênies S1 e depressão por endogamia em populações de milho (Zea mays L.)
- Inbreeding depression of 28 maize elite open pollinated varieties
- Inbreeding Depression Due to Overdominance in Partially Self-Fertilizing Plant Populations
- Responses to reciprocal recurrent selection and changes in genetic variability in IG-1 and IG-2 maize populations