http://repositorio.ufc.br/handle/riufc/54 2026-08-14T09:45:36Z 2026-08-14T09:45:36Z Freitas, Leslyene Maria de http://repositorio.ufc.br/handle/riufc/87263 2026-07-27T10:47:53Z 2026-01-01T00:00:00Z

Título: Diversidade genética de progênies de feijão-caupi utilizando marcadores ISSR e SSR Autor(es): Freitas, Leslyene Maria de Abstract: Cowpea (Vigna unguiculata (L.) Walp.) is a crop of great socioeconomic and nutritional importance in Brazil, particularly in the Northeast region, due to its excellent adaptability to diverse environmental conditions and its high nutritional value. However, crop productivity remains limited in some regions, highlighting the need for advances in cowpea breeding programs. In this context, the assessment of genetic variability is an essential step for identifying and selecting superior and genetically divergent parents, contributing to the development of populations with greater genetic variability and, consequently, improving the efficiency of breeding programs. Therefore, the present study aimed to confirm the hybridization of F1 progenies, evaluate the genetic diversity of F1 and F2 cowpea populations using ISSR molecular markers, and assess the potential of multiplex PCR associated with capillary electrophoresis using SSR markers. Seven parental genotypes, eight F1 progenies, and 97 individuals from the F2 population were evaluated. Genomic DNA was extracted from young leaves and subsequently subjected to PCR amplification using ISSR and SSR markers. The hybrid status of five previously selected F1 progenies was confirmed using seven ISSR markers, which enabled the identification of polymorphic bands inherited from the male parent and the discrimination of true hybrids from potential self-pollinated individuals. The formation of distinct clusters in the F2 population revealed the existence of genetic variability among the individuals. Four individuals exhibited the greatest genetic divergence compared with the remaining materials evaluated, indicating their potential for advancement in subsequent selection generations. In addition, multiplex PCR associated with capillary electrophoresis showed potential for allele identification in cowpea, although methodological adjustments and optimization of the experimental conditions are still required to improve the efficiency and standardization of the analyses. Overall, ISSR markers proved to be effective for molecular characterization, genetic diversity assessment, and hybrid confirmation in cowpea, highlighting the potential of the F2 population as a valuable source of genetic variability for cowpea breeding programs. Tipo: Dissertação

2026-01-01T00:00:00Z Pequeno, Márcio Rabelo http://repositorio.ufc.br/handle/riufc/87253 2026-07-24T17:43:50Z 1991-01-01T00:00:00Z

Título: Periodograma da busca de provisão de operarias da saúva do nordeste Autor(es): Pequeno, Márcio Rabelo Abstract: Scientific investigations developed at the Federal University of Ceará, Brazil has disclosed the northeast leaf-cutting ant, Atta opaciceps Borgmeier, 1939 (Hymenoptera: Formicidae) as a possible third insect to be domesticated. Then, behavioral studies has been conducted in order to make this species a beneficial entity. [...] Tipo: Dissertação

1991-01-01T00:00:00Z Moreira, Conceição de Maria Pontes http://repositorio.ufc.br/handle/riufc/87099 2026-07-13T17:30:24Z 1991-01-01T00:00:00Z

Título: Biologia, longevidade e germinação do pólen do urucueiro (Bixa orellana L.) in vitro Autor(es): Moreira, Conceição de Maria Pontes Abstract: Fresh pollen of annatto (Bixa orellana. L.), was biologically studied as its form, shape, size, and aperture. Its form is subcircular, and its shape is a relatively short one. [...] Tipo: Dissertação

1991-01-01T00:00:00Z Mendes, Roselita Maria de Souza http://repositorio.ufc.br/handle/riufc/87081 2026-07-10T18:32:18Z 1991-01-01T00:00:00Z

Título: Influência do tamanho da semente de girassol (Helianthus annuus L.) na germinação, vigor e produtividade Autor(es): Mendes, Roselita Maria de Souza Abstract: This study was developed in laboratory under seedbed conditions "in the section of Horticulture studies of Centro de Ciências Agrarias - in Fortaleza, Ceara, Brazil and on a irrigated area of the Experimental Farm of the Curu Valley, in Pentecoste, Ceara, Braz-il, all facilities belonging to the Federal Umversity of Ceara. [...] Tipo: Dissertação

1991-01-01T00:00:00Z