Viability Of Pollen Grain
Mostrando 1-10 de 10 artigos, teses e dissertações.
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1. Evidence of accelerated and altered pollen development after Imazapyr treatment in resistant sunflower
ABSTRACT Imazapyr (IM) treatment applied at early reproductive developmental stages have been associated with induced male sterility in sunflower (Helianthus annuus L.). The aim of this work was to determine the effects induced by two different doses of IM-treatment (1X and 2X; 80 and 160 g a.i.·ha-1) on pollen grain yield, pollen viability and on the exine
Bragantia. Publicado em: 2020-03
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2. Characterization of cultivars and low-temperature pollen grain storage in amaryllis (Hippeastrum sp.)
ABSTRACT The determination of viability and the preservation of pollen grains are useful tools for breeding of ornamentals, especially when the synchronization of flowering between species or cultivars does not occur naturally. Thus, the objective of this study was to characterize the flowering and to evaluate the preservation and maintenance of the viabilit
Rev. Ceres. Publicado em: 02/12/2019
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3. Influence of high temperature on the reproductive biology of dry edible bean (Phaseolus vulgaris L.)
ABSTRACT: The aim of this study was to investigate the effect of heat stress on 12 bean genotypes through the analysis of their reproductive biology in terms of flowering, pollen viability, meiotic behavior, and production. Plants were grown in a climate chamber at 25-20 °C (day and night) and at a high temperature treatment 37-26 °C (day and night) from t
Sci. agric. (Piracicaba, Braz.). Publicado em: 05/09/2019
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4. ‘URS Campestre’ seedless orange: a new mutant with female sterility
ABSTRACT: Seedlessness in fruit is a trait that is much sought after by juice making industries. Close to the city of São Sebastião do Caí, in the state of Rio Grande do Sul (RS), Brazil, a new mutant orange originating from natural mutation was identified and selected as a seedless material. To determine the mechanisms involved in the absence of seeds, t
Sci. agric. (Piracicaba, Braz.). Publicado em: 2017-10
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5. Passiflora cristalina and Passiflora miniata: meiotic characterization of two wild species for use in breeding
Abstract Passiflora cristalina and Passiflora miniata are two new wild species found in the southern Amazon region. This study aimed to analyze the meiotic behavior of the two species, by meiotic analysis, meiotic index and pollen grain viability, using routine methodologies of the laboratory. By the meiotic analysis, the two species were diploid with 18 chr
Crop Breed. Appl. Biotechnol.. Publicado em: 2017-09
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6. Establishment of growth medium and quantification of pollen grains of olive cultivars in Brazil's subtropical areas
ABSTRACT Pollen grain germination in vitro indicates viability and consequently provides information related to fruit set. It also assists in the development of hybrids. Along with a suitable species, a standard culture medium is essential for evaluating pollen viability. It should contain a gelling agent consisting of carbohydrates and enhancer elements as
Bragantia. Publicado em: 24/11/2015
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7. Morphology and viability of pollen grains from passion fruit species (Passiflora spp.)
The characterization and viability of pollen grains are useful tools to guide crosses in breeding programs. The objective of this study was to describe the morphological patterns and viability of pollen grains from five accessions of Passiflora edulis f. flavicarpa O. Deg. and five accessions of Passiflora setacea DC. Pollen morphology descriptions were made
Acta Bot. Bras.. Publicado em: 2013-12
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8. Cytogenetics and palinology of subfamilies Caesalpinioideae and Faboideae (FABACEAE) from south Minas Gerais State - Brazil / CITOGENÃTICA E PALINOLOGIA DAS SUBFAMÃLAS CAESALPINIOIDEAE E FABOIDEAE (FABACEAE) DO SUL DE MINAS GERAIS
A famÃlia Fabaceae, terceira maior famÃlia de plantas com flores, com centros de diversidade nas regiÃes tropicais e subtropicais, Ã dividida em trÃs grandes grupos: Caesalpinioideae, Mimosoideae e Faboideae. Faboideae, considerada monofilÃtica, derivada de dentro da subfamÃlia Caesalpinioideae, inclui o gÃnero Crotalaria, sendo este importante na in
Publicado em: 2009
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9. Meiose em hÃbridos hexaplÃides de capim elefante e milheto / Meiosis in hexaploid hybrids between elephant grass and pearl millet
A strategy of the breeding programs of the elephant grass (Pennisetum purpureum 2n = 2x = 28), is the hybrid production between elephant grass and pearl millet (P. glaucum, 2n = 2x = 14), originating triploids hybrids and sterile, however presenting forage quality and providing the obtaining of cultivars superiors to intensify the dairy production. The steri
Publicado em: 2006
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10. Genetic analysis of Nicotiana pollen-part mutants is consistent with the presence of an S-ribonuclease inhibitor at the S locus
Self-incompatibility (SI) is a genetic mechanism that restricts inbreeding in flowering plants. In the nightshade family (Solanaceae) SI is controlled by a single multiallelic S locus. Pollen rejection in this system requires the interaction of two S locus products: a stylar (S)-RNase and its pollen counterpart (pollen S). pollen S has not yet been clo
The National Academy of Sciences.