Heterosis for oil content in maize populations andhybrids of high quality protein



Document title: Heterosis for oil content in maize populations andhybrids of high quality protein
Journal: CBAB. Crop breeding and applied biotechnology
Database: PERIÓDICA
System number: 000269152
ISSN: 1518-7853
Authors: 1



Institutions: 1Universidade Federal de Goias, Escola de Agronomia e Engenharia de Alimentos, Goiania, Goias. Brasil
Year:
Season: Jun
Volumen: 6
Number: 2
Pages: 113-120
Country: Brasil
Language: Inglés
Document type: Artículo
Approach: Experimental
English abstract This study aimed to evaluate QPM populations and their crosses for grain oil content to determine the heterosis and its components. Ninety-six hybrids and their 21 parents were analyzed and separated in the groups dent and flint, in the partial diallelic/diallel intergroup scheme. The oil content was extracted from dry matter by the Soxhlet method in three replicates for each genotypic material and attained mean values of 5.04g 100g-1 and 4.78g 100g-1, respectively, in the groups dent and flint. Among the hybrid crosses, CMS 456 x CMS 463 (6.84g 100g-1) presented the highest value. Although the average heterosis (-9.83%) indicates average dominance of the alleles for low oil content, combinations with positive total heterosis were observed. In this sense, the best populations under the focus of improvement for high oil content were ZQP101 and ZQP103, both of the dent group, and CMS52, BR473, CMS455c and CMS465 of the flint group. Hence, it was concluded that there is genetic variability and significant heterosis in the genotypes under study
Portuguese abstract Este trabalho objetivou avaliar populações QPM e seus cruzamentos, quanto ao teor do óleo no grão, determinando-se a heterose e seus componentes. Foram analisados 96 híbridos e seus 21 genitores, divididos em grupos dentado e duro, no esquema dialélico parcial intergrupos. Extraiu-se o teor de óleo da matéria seca pelo método Soxhlet, utilizando-se três repetições para cada material. No grupo dentado e duro a média foi de 5,04g 100g-1 e 4,78g 100g-1, respectivamente. Dentre os híbridos o maior valor foi do cruzamento CMS 456 x CMS 463 (6,84g 100g-1). Embora a heterose média (-9,83%) indique que há dominância média dos alelos para baixo teor de óleo, foram observadas combinações com heterose total positiva. Nesse sentido as melhores populações visando melhoramento para alto óleo foram ZQP101 e ZQP103, do grupo dentado, e CMS52, BR473, CMS455c e CMS465, do grupo duro, concluindo-se que existe variabilidade genética e heterose significativa entre os materiais estudados
Disciplines: Agrociencias
Keyword: Fitotecnia,
Gramíneas,
Genética,
Mejoramiento genético,
Maíz,
Zea mays,
Composición química,
Proteínas,
Variabilidad genética,
Heterosis
Keyword: Agricultural sciences,
Crop husbandry,
Gramineae,
Genetic improvement,
Corn,
Zea mays,
Chemical composition,
Proteins,
Genetic variability,
Heterosis,
Genetics
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