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genetic Correlation between Agronomically Important Traits in Yellow Passion Fruit

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American Journal of Plant Sciences 2013年第11期4卷 2112-2117页

作者： Leonarda Grillo Neves Claudio Horst Bruckner Marcelo Coutinho Picanco Severino de Paiva Sobrinho Kelly Lana Araújo Petterson Baptista da Luz Marco Antonio Aparecido Barelli Willian Krause laboratóriode melhoramento genético vegetal Universidade do Estado de Mato GrossoCáceresBrasil Departamento de Fitotecnia Universidade Federal de VicosaVicosaBrasil Departamento de Entomologia Universidade Federal de VicosaVicosaBrasil Departamento de Agronomia Universidade do Estado de Mato GrossoCáceresBrasil

Breeding programs have sought to determine the minimum period of genotype evaluation, which is a long term-process. The objective of this work was to determine the association between qualitative traits of yellow passion fruit (Passiflora edulis Sims) and relate maturity to other characteristics. To carry out this work, 113 families of full-sibs and half-sibs were planted in Viçosa (MG), Brazil, in a randomized block experimental design arranged in sets (treatment groups). The association between the analyzed characteristics was studied using path analysis and canonical correlation techniques. It was found that lower-yielding but larger-fruit bearing genotypes of passion fruit plant also require more days until reaching anthesis. Round-shaped fruits are linked to higher contents of total soluble solids. More intense pulp color also indicates higher contents of total soluble solids. The riper the fruit, the more intensely orange is the color of the pulp. The ratio between the levels of total soluble solids and total titrimetric acidity was the main determinant of pulp color for passion fruit.

关键词： Canonical Correlation Passiflora edulis Path Correlation

Physiological Quality and Seed Production of Corn and Fabaceae in Monoculture and Intercropping

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American Journal of Plant Sciences 2017年第11期8卷 2597-2607页

作者： Anna Christina Sanazário de Oliveira Fábio Cunha Coelho Henrique Duarte Vieira Jocarla Ambrosim Crevelari Aurea Izabel Aguiar Fonseca e Souza Tiago Massi Ferraz Antonia Alice Costa Rodrigues Programa de Pós-Graduacao em Agroecologia Centro de Ciências AgráriasUniversidade Estadual do MaranhaoSao LuísBrasil laboratório de Fitotecnia Campos dos GoytacazesUniversidade do Norte Fluminense Darcy RibeiroCamposBrasil laboratório de melhoramento genético vegetal Campos dos GoytacazesUniversidade do Norte Fluminense Darcy RibeiroCamposBrasil Universidade Federal Rural da Amazonia BelémBrasil

The aim of this study was to evaluate the physiological quality and seed production of Fabaceae and corn in monoculture and intercropping in areas cropped under different management. The following treatments were evaluated: corn + NPK + weed control;corn + weed control;corn + NPK;corn + crotalaria;corn + jack bean. Intercropping raised the average number of corn ears of corn and the seed IVG Weed control positively influenced the final stand and average number of ears. NPK fertilization on corn sowing positively influenced the seed electrical conductivity. The yield of corn plants intercropped with crotalaria and jack bean was statistically similar. However, their absolute values should be considered for economic purposes. Corn seeds derived from intercropping with crotalaria were more effective compared with intercropping with jack bean. Crotalaria and jack bean seeds when intercropped with corn have high production, germination and vigor (IVG and emergence).

关键词： Zea mays Green Manure No-Till System Vigor Germination

Epidemiologic Study of Ramularia areola under Different Soil Covers and Spacings,for Cotton Crops

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American Journal of Plant Sciences 2013年第11期4卷 2049-2059页

作者： Jaqueline Aguilla Pizzato Dejania Vieira Araújo Milson Evaldo Serafim Kelly Lana Araújo Rivanildo Dallacort Thiago Alexandre Santana Gílio Jair Romano Jr Vanderlei Antunes Maciel Programa de Pós-graduacao em Ambiente e Sistemas de Producao Agrícola Universidade do Estado de Mato GrossoTangaráda SerraBrasil Instituto Federal de Educacao Ciência e Tecnologia de Mato Grosso—IFMTCáceresBrasil laboratório de melhoramento genético vegetal.Universidade do Estado de Mato Grosso CáceresBrasil Programa de Pós-graduacao em genética e melhoramento de Plantas Universidade do Estado de Mato GrossoTangaráda SerraBrasil laboratório de Fitopatologia Universidade do Estado de Mato GrossoTangaráda SerraBrasil

The objective of this work was to evaluate the progress of the areolate mildew of cotton under different soil cover and spacing conditions. The experiment was carried out using randomized blocks and a 2 × 3 factorial design, with two spacings (0.45 m and 0.90 m) and three soil covers (no cover, Pennisetum glaucum and Crotalaria spectabilis) with four replications. The plants were inoculated with R. areola, sixty DAS. A total of 14 evaluations of disease severity were performed. At the lower, middle and upper thirds of plants, a diagram scale with nine levels of severity was used and the resulting data were converted into the AUDPC. Gompertz, logistic, and monomolecular mathematical models were tested in the disease severity curves for each third. Agronomics characteristics were evaluated as well. Significant differences of AUDPC were found for the cotton plants thirds, and the middle third was the highest AUDPC. Significant difference for the lower and upper thirds, whose AUDPC were highest on 0.90 m spacing, was observed too. The disease progress curves of the thirds did not fit the tested models. Significant results to the both covers situations, where the treatments grown on crotalária cover and without cover had highest AUDPC, were evidenced. The treatments with C. spectabilis cover were taller than other treatments. Significant data were observed for the cover crops used and in the treatments grown at 0.90 m spacing, to residual cover and crop yield, respectively.

关键词： Pennisetum glaucum Crotalaria spectabilis Areolate Mildew High-Density Crops and No-Till

Technique to Obtain Mitotic Chromosomes of <i>Conyza bonariensis</i>L. Cronquist (Asteraceae)

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American Journal of Plant Sciences 2015年第9期6卷 1466-1474页

作者： Juliana Maria de Paula Cecília Alzira Ferreira Pinto-Maglio Programa de Pós-Graduação em genética Melhoramento Vegetal e Biotecnologia Centro de Pesquisa e Desenvolvimento de Recursos Genéticos Vegetais Instituto Agron&ocircmico de Campinas Campinas Brazil Centro de Pesquisa e Desenvolvimento de Recursos genéticos Vegetais Instituto Agron&ocircmico de Campinas Campinas Brazil

Cytogenetic analysis requires cytological preparations that unequivocally reveal the chromosome number and permit optimal visualizations of chromosome morphology for the construction of karyotypes and ideograms. Chromosomal characterization is possible only by establishing these two parameters. To cytogenetically characterize the weed Conyza bonariensis (L.) Cronquist (Asteraceae), it was necessary to improve cytological analysis techniques to obtain optimal results. This species belongs to a genus whose plants have wide phenotypic plasticity. These plants can be morphologically differentiated by other types of analysis, and thus the application of this technique will serve as a reference for cytogenetical analysis of other groups of plants that have cytogenetic characteristics similar to those of C. bonariensis. The methodology described here highlights three main protocol steps: 1) root tip collection from newly germinated seed radicles and from young root tips of mature plants, 2) pretreatment of meristems with antimitotic agents, both isolated and combined, and 3) acid and enzymatic hydrolytic processes.

关键词： Hairy Fleabane Cytogenetics Chromosomes Weed