Pollen Fertility
Mostrando 1-12 de 61 artigos, teses e dissertações.
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1. Relationship between meiotic instability and fertility in F2 generation Arabusta coffee plants
ABSTRACT Parental plants, an F1 interspecific hybrid and the F2 generation from Arabusta coffee plants were investigated for meiotic behavior and viability of pollen to understand part of their reproductive biology that affects their possible use in coffee breeding programs. Both parental plants (C. canephora var. Robusta 4x and C. arabica var. dihaploid Bou
Bragantia. Publicado em: 18/04/2019
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2. Pollen morphology and viability in Bromeliaceae
ABSTRACT Pollen morphology characterization is important in taxonomy, conservation and plant breeding, and pollen viability studies can support breeding programs. This study investigated pollen morphology and male fertility in 18 species of Bromeliaceae with ornamental potential. For morphological characterization, pollen grains were acetolyzed and character
An. Acad. Bras. Ciênc.. Publicado em: 07/12/2017
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3. Cytoembryological evaluation, meiotic behavior and pollen viability of Paspalum notatum tetraploidized plants
Abstract This study evaluated the mode of reproduction, the meiotic behavior and the pollen viability of three tetraploid plants (2n=4x=40) originated from somatic chromosome duplication of Paspalum notatum plants. The plant WKS 3 changed the mode of reproduction after duplication and became apomictic. The plants WKS 63 and WKS 92 confirmed sexual mode of re
Crop Breed. Appl. Biotechnol.. Publicado em: 2016-12
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4. Interspecific hybrids between Paspalum plicatulum and P. oteroi: a key tool for forage breeding
ABSTRACT Grama-tio-pedro (Paspalum oteroi Swallen) is a rare stoloniferous grass of the Plicatula group of Paspalum, well adapted to continuous grazing in areas subject to seasonal flooding in the Pantanal region, in central western Brazil. The species is a facultative apomictic (asexual reproduction by seed) tetraploid, sporadically cultivated on Pantanal f
Sci. agric. (Piracicaba, Braz.). Publicado em: 2016-08
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5. Viability of pollen grains of tetraploid banana
ABSTRACT Obtaining banana tetraploid cultivars from triploid strains results in total or partial reestablishment of fertility, allowing the occurrence of some fruits with seeds, a feature that is undesirable from a marketing perspective. The objective of this study was to assess the viability of pollen of 12 banana tetraploid hybrids (AAAB) by means of in vi
Bragantia. Publicado em: 16/02/2016
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6. Obtaining tetraploid plants of ruzigrass (Brachiaria ruziziensis)
The objective of the present work was to induce chromosome doubling in genotypes of Brachiaria ruziziensis with potential for production of good-quality biomass and tolerance/resistance to stress caused by aluminum and spittlebugs. Germinated seeds of B. ruziziensis were immersed in 0.1% colchicine solution for 2 or 3 hours. Ploidy level was determined by fl
R. Bras. Zootec.. Publicado em: 2014-03
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7. Self-sterility in the hexaploid Handroanthus serratifolius (Bignoniaceae), the national flower of Brazil
Polyploidization is common among angiosperms and might induce typically allogamous plants to become autogamous (self-compatible, relying on sexual self-fertilization) or apomictic (achieving asexual reproduction through seeds). This work aimed to determine whether neopolyploidy leads to the breakdown of the self-incompatibility system in the hexaploid non-ap
Acta Bot. Bras.. Publicado em: 2013-12
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8. Phenotypic, cytogenetic and spike fertility characterization of a population of male-sterile triticale
Triticale (X Triticosecale Wittmack) is a good cereal for production of flour and feed. A segregating population of triticale was developed from a male-sterile (MS) plant. To determine whether this new source of male sterility in triticale is appropriate for use in breeding programs the expression of the male sterility phenotype was characterized through spi
Sci. agric. (Piracicaba, Braz.). Publicado em: 2013-02
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9. Conjoint effect of oil-seed cakes and Pseudomonas fluorescens on the growth of chickpea in relation to the management of plant-parasitic nematodes
Soil application of organics has been explored as an alternative means of organic management of plant-parasitic nematodes. Efficiency of different oil-seed cakes of neem (Azadirachta indica), castor (Ricinus communis), groundnut (Arachis hypogaea), linseed (Linum usitatissimum), sunflower (Helianthus annuus) and soybean (Glycine max) were evaluated in field
Braz. arch. biol. technol.. Publicado em: 2012-12
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10. Improving reproductive efficiency of chickpea by foliar application of zinc
Zinc deficiency is not only the cause of low productivity of crops, but it also results in low zinc content in seeds, which leads to poor dietary zinc intake. To study the effect of zinc foliar application on improving plant yield and seed zinc content for human consumption, chickpea plants were raised in refined sand culture with deficient (0.2 µM) and suf
Braz. J. Plant Physiol.. Publicado em: 2012-09
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11. Chromosome number and microsporogenesis in Paspalum maritimum (Caespitosa Group; Gramineae).
Despite pf economic importance of the genus Paspalum, little or no cytologic information is available for many species. This is the first report about chromosome munber and meiotic behavior for P. maritimum. The three accessions colected in Amapa State (North Region of Brazil) were tetraploid (2n=4x=40) with the chromossomes associating predominantly as biva
Brazilian Archives of Biology and Technology. Publicado em: 2011
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12. Restoring pollen fertility in transgenic male-sterile eggplant by Cre/loxp-mediated site-specific recombination system
This study was designed to control plant fertility by cell lethal gene Barnase expressing at specific developmental stage and in specific tissue of male organ under the control of Cre/loxP system, for heterosis breeding, producing hybrid seed of eggplant. The Barnase-coding region was flanked by loxP recognition sites for Cre-recombinase. The eggplant inbred
Genetics and Molecular Biology. Publicado em: 21/05/2010