Amylose content and micromorphology of popcorn progenies with different popping expansion volumes
| Autor: | Filipe Bittencourt Machado de Souza, Ana Izabella Freire, João Cândido de Souza, Wantuir Filipe Teixeira Chagas, Renata Ranielly Pedroza Cruz, Elisa de Melo Castro, Ariana Mota Pereira |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
General Veterinary
Agriculture (General) Agriculture 04 agricultural and veterinary sciences thickness 040401 food science Endosperm S1-972 endosperm Horticulture chemistry.chemical_compound 0404 agricultural biotechnology chemistry Plant morphology Amylose 040103 agronomy & agriculture 0401 agriculture forestry and fisheries Starch granule Crop quality Zea mays var. everta Animal Science and Zoology pericarp Agronomy and Crop Science starch granule |
| Zdroj: | Ciência Rural, Vol 50, Iss 2 (2020) Ciência Rural v.50 n.2 2020 Ciência Rural Universidade Federal de Santa Maria (UFSM) instacron:UFSM |
| ISSN: | 1678-4596 |
| Popis: | EnglishPopcorn (Zea mays var. everta) has a higher commercial value than common maize, in addition to being a popular food among consumers. Today, there is a constant search for cultivars with superior performance for several traits of interest in the case of popcorn, yield and popping expansion. On this basis, this project proposes to characterize progenies of popcorn with different values of expansion capacity regarding chemical composition and micromorphology. Kernels from the fifth cycle (C5) of intrapopulation recurrent selection were evaluated. The progenies were selected based on the popping expansion volume of their kernels. The kernels were quantified for amylose and analyzed for starch granule arrangement and pericarp thickness by scanning electron microscopy. Progenies with low popping expansion volume (0 and 7 mL g-1) showed amylose contents of 21.24 and 20.18%, respectively; a less compact endosperm, with individual starch granules interspaced with empty spaces; and pericarp thickness between 40.94 and 38.99 µm, respectively. By contrast, progenies with high popping expansion volume (30 and 35 mL g-1) showed amylose contents of 23.92 and 26.10%; a vitreous endosperm; more-compact starch granules without empty spaces in between; and pericarp thickness between 107.66 and 107.84 µm. Progenies with higher popping expansion volume exhibited a thicker pericarp, a high amylose percentage and a more-compact endosperm, whereas those with the lower expansion volumes showed a thinner pericarp, a lower amylose percentage and individual starch granules. portuguesO milho-pipoca (Zea mays var. everta) tem um valor comercial mais elevado do que o milho comum e e um alimento popular entre os consumidores. Hoje, existe uma constante busca por cultivares com desempenho superior para os diversos caracteres de interesse, no caso da pipoca, produtividade e capacidade de expansao. O trabalho propoe caracterizar progenies de milho-pipoca com diferentes valores de capacidade de expansao quanto a composicao quimica e micromorfologia. Foram estudados graos do quinto ciclo (C5) de selecao recorrente intrapopulacional. As progenies foram selecionadas com base nos valores de capacidade de expansao de seus graos. Os graos foram quantificados para amilose e analisados quanto ao arranjo dos grânulos de amido e espessura do pericarpo por microscopia eletronica de varredura. Progenies com baixa capacidade de expansao (0 e 7 mL g-1) apresentaram teor de amilose de 21,24 e 20,18% respectivamente; endosperma menos compacto, com grânulos de amido individualizados e intercalados com espacos vazios; e espessura do pericarpo medindo entre 40,94 e 38,99 µm, respectivamente. Por outro lado, progenies com alta capacidade de expansao (30 e 35 mL g-1) apresentaram teor de amilose de 23,92 e 26,10%, endosperma vitreo, sendo os grânulos de amido mais compactos e sem espacos vazios entre eles; e espessura do pericarpo medindo entre 107,66 e 107,84 µm. Progenies com altos valores de capacidade de expansao apresentam maior espessura de pericarpo, alta porcentagem de amilose e endosperma mais compactado, enquanto as com menores valores de expansao, apresentam menor espessura do pericarpo, menor porcentagem de amilose e grânulos de amido individualizados. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|