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Search Results: 1 - 10 of 12833 matches for " Dilson Ant?nio;Suzin "
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Genotype x environment interaction of agronomic and processing quality traits in potato
Augustin, Lizete;Milach, Sandra;Bisognin, Dilson Antnio;Suzin, Marilei;
Horticultura Brasileira , 2012, DOI: 10.1590/S0102-05362012000100015
Abstract: at the main crop production region of rio grande do sul state, brazil, potato is cultivated in two different growing seasons: autumn and spring. the objectives of this research paper were: i) identify potato clones with high yield potential and industrial quality for autumn and spring growing seasons in the northern/northeastern region of the state; ii) estimate the effects of environment and of the genotype x environment interaction on the expression of agronomic and processing quality traits of potato clones in order to determine the appropriate strategy for breeding potato for the target region. one hundred and seventy clones of nine families were developed and compared to the cultivars atlantic, baronesa, catucha, ciclamen, hertha, lady roseta, macaca, monalisa and vivaldi and to the clone smij 461-1, in the autumn and spring of 2006, in passo fundo, northern rio grande do sul state. the evaluated traits included number of tubers per plant, tuber weight, plant yield, presence of deep eyes, dry matter content and chip color. genotype x environment interaction (g x e) was significant for the expression of all traits but processing quality traits like chip color were most influenced by the growing season conditions. genetic potential expression for yield traits was maximized in the spring season. superior clones combining agronomic and quality traits were identified at the two growing seasons. high correlation between the two growing seasons was observed for the presence of deep eyes and dry matter, indicating they can be selected at either season.
Origin and evolution of cultivated cucurbits
Bisognin, Dilson Antnio;
Ciência Rural , 2002, DOI: 10.1590/S0103-84782002000400028
Abstract: cucurbits (cucurbitaceae) are among the most important plant families supplying humans with edible products and useful fibers. plants of this family are very similar in above ground development, but they have high genetic diversity for fruit shape and other fruit characteristics, resulting in a variety of uses. the objective of this review was to discuss the origin and evolution of the most important cultivated cucurbits. understanding the evolutionary history and domestication process increase the possibility for better exploiting the genetic diversity for cultivar development. the domestication selection in cucurbits was for shape, less bitter flesh, larger and fewer seeds, and larger fruit size, resulting in high genetic diversity within and among cultivated species. this variation can be associated with the wide range of uses that require different shape, size and a constant ratio between fruit length and fruit diameter. the discussion of the breeding history indicates how artificial selection could speed up changes in fruit characteristics to attend specific uses and increase adaptation to a variety of environmental conditions in which cucurbits are growing worldwide. although interspecific hybridization has been employed in cucurbit breeding more than in any other family, there is still a high potential for increasing its application for germplasm and cultivar development.
Breeding vegetatively propagated horticultural crops
Bisognin, Dilson Antnio;
Crop Breeding and Applied Biotechnology , 2011, DOI: 10.1590/S1984-70332011000500006
Abstract: horticulture is an important part of agriculture with many important crops being vegetatively propagated. the objectives of this work were to discuss some of the most important characteristics of vegetatively propagated crops and the breeding strategies to develop and propagate new cultivars. vegetative propagation enables to fix favorable combinations of important traits, very specific chemical compositions, superior genetic variance interactions and high levels of heterozygosity. breeding new cultivars involve few possibilities of genetic recombination by sexual reproduction and many generations of selection and vegetative propagation. marker assisted selection should be useful for genotyping and selecting complementary parents for crossing and for identifying superior genotypes at early stages of selection. the tissue culture technique enables to get disease free stock plants and to maximize its multiplication rate, having an important role in yield and quality of these crops.
Breeding vegetatively propagated horticultural crops
Dilson Antnio Bisognin
Crop Breeding and Applied Biotechnology , 2011,
Abstract: Horticulture is an important part of agriculture with many important crops being vegetatively propagated. Theobjectives of this work were to discuss some of the most important characteristics of vegetatively propagated crops and the breedingstrategies to develop and propagate new cultivars. Vegetative propagation enables to fix favorable combinations of important traits,very specific chemical compositions, superior genetic variance interactions and high levels of heterozygosity. Breeding new cultivarsinvolve few possibilities of genetic recombination by sexual reproduction and many generations of selection and vegetative propagation.Marker assisted selection should be useful for genotyping and selecting complementary parents for crossing and for identifyingsuperior genotypes at early stages of selection. The tissue culture technique enables to get disease free stock plants and to maximizeits multiplication rate, having an important role in yield and quality of these crops.
Origin and evolution of cultivated cucurbits
Bisognin Dilson Antnio
Ciência Rural , 2002,
Abstract: Cucurbits (Cucurbitaceae) are among the most important plant families supplying humans with edible products and useful fibers. Plants of this family are very similar in above ground development, but they have high genetic diversity for fruit shape and other fruit characteristics, resulting in a variety of uses. The objective of this review was to discuss the origin and evolution of the most important cultivated cucurbits. Understanding the evolutionary history and domestication process increase the possibility for better exploiting the genetic diversity for cultivar development. The domestication selection in cucurbits was for shape, less bitter flesh, larger and fewer seeds, and larger fruit size, resulting in high genetic diversity within and among cultivated species. This variation can be associated with the wide range of uses that require different shape, size and a constant ratio between fruit length and fruit diameter. The discussion of the breeding history indicates how artificial selection could speed up changes in fruit characteristics to attend specific uses and increase adaptation to a variety of environmental conditions in which cucurbits are growing worldwide. Although interspecific hybridization has been employed in cucurbit breeding more than in any other family, there is still a high potential for increasing its application for germplasm and cultivar development.
Estimativa dos componentes de variancia e herdabilidade para formato de fruto em porongo: Lagenaria siceraria (Mol.) Standl
Bisognin, Dilson António;Storck, Lindolfo;
Ciência Rural , 2000, DOI: 10.1590/S0103-84782000000400006
Abstract: variance components and heritability estimation of agronomic traits, such as fruit shape in bottlegourd are very importam to define selection strategies and to estimate selection gain. nine progénies of half-sib families were evaluated aiming to estimate variance and covariance components, the heritability of fruit shape and to understand the origin of the genetic gain with mass selection in bottlegourd fruits. significative estimates were found for genetic variance of large diameter and neck diameter o f the "cuia" (commercial part of the bottlegourd) and for environmental variance of fruit shape. heritability estimate for fruit shape selection based on fruit was moderately (0.36) and moderately high for family mean (0.53). mass selection based upon mean population performance or within populations is the breeding method more appropriate for improvement of fruit shape in bottlegourd.
Rooting Potential of Mini-Cuttings for the Production of Potato Plantlets  [PDF]
Dilson Antnio Bisognin, Maurício Guerra Bandinelli, Paula Kielse, Hardi Fischer
American Journal of Plant Sciences (AJPS) , 2015, DOI: 10.4236/ajps.2015.62042
Abstract: The production of mini-tubers under soilless cultivation system increased the availability of pathogen-free seed potatoes. The objective of this study was to evaluate the rooting capability of mini-cuttings of potato clones as a function of the irrigation solution and the physiological age of the mother plant, under soilless cultivation system. Potato mini-cuttings were collected from young and mature plants of the cultivars Asterix and Macaca and the advanced clone SMINIA 793101-3. The young plants were newly acclimatized individuals and the mature plants were at the stage of producing mini-tubers. In the first experiment, mini-cuttings originating from summer pruning of mature plants were grown under closed soilless cultivation system irrigated with a nu- trient solution developed for the production of potato mini-tubers and a solution comprised of tap water only. The experiment was conducted in a 3 × 2 factorial arrangement (clones and irrigation solutions) in the complete random design with four replicates of 15 mini-cuttings. In the second experiment, the young and mature mini-cuttings were established under a closed soilless cultivation system irrigated with nutrient solution. The experiment was conducted in a 3 × 2 factorial arrangement (clones and physiological age of the mother plant) in the complete random design with four replicates of 15 mini-cuttings. In both experiments, the percentage of rooting and survival of mini-cuttings, number of roots and length of the longest root were assessed at 21 days of cultivation. Potato mini-cuttings can be rooted under closed soilless cultivation system irrigated with nutrient solution or tap water. Mini-cuttings of young plants have higher rooting capability compared to the ones taken from mature plants. The loss of rooting capability depends upon the potato cultivar.
Uso do ácido giberélico na quebra de dormência e de dominancia apical em batata
Bisognin, Dilson Antnio;Centenaro, Ricardo;Missio, Evandro Luiz;
Ciência Rural , 1998, DOI: 10.1590/S0103-84781998000200004
Abstract: a field and a laboratory experiment was carried out in 1996 to evaluate the effects of gibberellic acid (ga) to break dormancy and apical dominance of potato seed tubers. a comparison between gibberellic acid spraying application on the haulm and directly on the tubers was established. four different tuber sizes were used from each one of the baronesa, macaca, and monte bonito cultivars. the plant treatments were 0, 250, 500. 750 and 1000 g/ha of ga sprayed seven days before haulm destruction. two ga concentrations were applied (10 and 30ppm) immediately after harvest as tuber treatment. no interactions from ga applications and cultivars, neither from ga applications and tubers sizes were observed. all the haulm treatments resulted in an increasing on the percentage of sprouted tubers and on the number of sprouts per tuber. in addition it reduced the number of days from planting to emergence. a tuber application of 30ppm of ga increased the number of sprouts per tuber by 113.6%, and increased the number of stems per square meter by 37.8%. moreover the 30ppm application of ga reduced the length of the penod from planting to emergence. when compared with untreated control, 30ppm of ga treatment showed an increase of the total yield (13.8 %) and of the number of tubers per plot (23.2%). the yield of seed tubers was increased by 25.8% and the number of seed tubers by 27.6%. in conclusion, tuber spraying with ga increases the rate of sprouting, the number of stems and the number of produced tubers as well as the yield. independently on the ga treatment, big seed tubers show a fast emergence of the seedling, a great number of stems and an increased height as compared to small seeds. these improve the number and the yield of tubers. different sizes of tubers must be planted separately at an appropriate density, in order to gain a suitable stem density, and a uniform plant height, to increase the yield of commercial tubers.
Cucumber seedling dependence on cotyledonary leaves for early growth
Bisognin, Dilson Antnio;Velasquez, Luis;Widders, Irvin;
Pesquisa Agropecuária Brasileira , 2005, DOI: 10.1590/S0100-204X2005000600002
Abstract: the objective of this work was to evaluate the dependence of cucumber (cucumis sativus l.) seedlings on cotyledonary leaves for early growth and establishment. sets of two uniform emerging seedlings were used to quantify the initial growth and dry matter accumulation, as well as the intensity and stage of cotyledon damage in seedling establishment and to determine cotyledon protein, amino acid and carbohydrate contributions to the growing seedling. cucumber seedling establishment was found to be highly dependent on cotyledonary leaves. root system establishment was highly dependent on the health of the aerial part. one cotyledon was enough to maintain aerial growth of seedlings after unfolding the first true leaf. cucumber seedlings depended on both cotyledons to keep root system growth at least until leaf area was equivalent to cotyledon area. covering one or both cotyledons of seedlings with one unfolded leaf increased carbohydrate content of uncovered cotyledon and leaves compared with control seedlings. cucumber seedlings are highly dependent on cotyledonary leaves and aerial parts are less dependent than root system. cotyledon damage at early stages of plant establishment would adversely impact crop yield by reducing plant density, an important yield component, or slowing down seedling growth and establishment.
Efeito do tamanho de fruto e do método de extra??o na qualidade fisiológica de sementes de porongo
Bisognin, Dilson Antnio;Menezes, Nilson Lemos de;Bellé, Rogério Antnio;Albini, Adriana Maia;
Ciência Rural , 1997, DOI: 10.1590/S0103-84781997000100003
Abstract: bottie gourd - lagenaria siceraria (mol.) standl - the fruits harvested from a farm localed in restinga seca county, were used to evaluate seeds in the seed laboratory of the federal university of santa maria. the effect of fruit size on seed physiological quality was studied using seeds from ten large, medium and small bottle gourd fruits. fruits were characterized by the length, the diameter. the shell thickness, and by the number of seeds. the seeds were characterized by the length, the width, the thickness, and the weight of 1000 seeds. water fermentation during 24, 48, 72, 96, and 120 hours and dipping in hcl solution by 10, 20, and 30% during 30 minutes were used to compare methods of extracting seeds from medium bottle gourd fruits stored for 60 days. the manual extraction of seeds was considered as the control treatment. the physiological quality of the seeds was evaluated by the germination and the first counting test and averaging time of germination parameters. results indicated that the size of botlle gourd fruit can be characterized either by the length or the width. lighter seeds with smaller width and thickness were extracted from smaller fruits. the treatment with hcl solution specially on 20 and 30% concentration was not efficient for the extracting bottle gourd seeds because the cleaning process was more difficult and qffècted negatively seed germination and the vigor. the results show that as the size of the fruits increase the number and weight of seeds also increase without changing the ability to produce normal seedlings. the cleaning process of bottle gourd seeds in hcl solution reduces their vigor. the best period of fermentation of seeds was observed in water at 25°c for 72 hours, however, the period from 48 to 96 hours improved their physiological quality and also facilitated the cleaning process. the bottle gourd seeds germinate in environment with 43.4% of humidity and resonable air temperature, humidity and aeration.
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