Caracterização morfológico reprodutiva de acessos de Jureminha (Desmanthus virgatus (L.) Willd.) nativa de Sergipe

• Ano de defesa: 2007
• Autor(a) principal: Fontenele, Ana Consuelo Ferreira
• Orientador(a): Aragão, Wilson Menezes
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Sergipe
• Programa de Pós-Graduação: Pós-Graduação em Agroecossistemas
• País: BR
• Palavras-chave em Português: Agroecossistemas; decritores morfológicos; variabilidade genética
• Palavras-chave em Inglês: Agroecosystems; morphological descriptors; genetic variability
• Área do conhecimento CNPq: CNPQ::CIENCIAS AGRARIAS
• Link de acesso: https://ri.ufs.br/handle/riufs/6606

Among the most representative families of the world flora, the Legumonosae (Fabaceae) is one of most expressive her the capacity in fixing nitrogen in the soil and its releasing for the agroecosystems, presence in many agricultural systems, aggressive characteristic of seed dispersion, and by the considerable forage potential. The present work aimed to characterize accessions of the native legume Jureminha, collected in different ecological- geographic regions of Sergipe state, using morphological reproductive descriptors. Two-hundred and twelve accessions of Desmanthus were cultivated the Embrapa Tabuleiros Costeiros Experimental Station in Nossa Senhora das Dores, SE. The experiment was carried out in a completely randomized block design with 2 replications and 3 representative plants per plot, spaced by 2x2 m from each other. The characters of fertilization percentage (Ft), flowering after pruning (Flo), pods per flower (Vi), pod length (CpV), pod width (LgV), seeds per pod (SV), locus per pod (LoV), weight of 100 seeds (PS) were evaluated. Analysis of variance was processed by the GENES statistical program (Cruz, 2001), estimating for each characteristic the average genetic inheritance (h2 m), the experimental variation (CVe%) and genetic (CVg%) coefficients, and the correlation between such coefficients. Grouping multivariate techniques by the method of Tocher Optimization and Hierarchic Closest Neighbor and the Plane Distance Projections, utilizing the Mahalanobis generalized distance as the dissimilarity measurements were also applied. Significant genetic variability for the characters VI. PS, CpV, and LoV were found between the studied accessions, indicating a genetic potential to be used in breeding programs. Largest genetic inheritance were found for the CpV and LoV characters with respectively 59.59% and 50.61%. Such characters also showed the highest degree of correspondence between the genetic value and phenotypic value with respectively 0.72 % and 0,859 %. The SV and LoV characters had the greatest contribution for the divergence with respectively 37.20% and 14.39% of the variation. Seven divergent groups were formed. There was concluded that there are not a large genetic divergence among the accessions considering the majority of the accessions composed the first group and two groups were composed by four accessions and three groups were composed by two accessions each one, and one group by only one accessions.