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Title: | Duplicação cromossômica de gramíneas forrageiras: uma alternativa para programas de melhoramento genético |
Other Titles: | Chromosome doubling of grasses: an alternative to plant breeding |
Keywords: | Poliploidização Substâncias antimitóticas Gramíneas forrageiras - Melhoramento genético Polyploidization Antimitotic substances Fodder grasses - Genetic improvement |
Issue Date: | Jul-2012 |
Publisher: | Universidade Federal de Santa Maria |
Citation: | PEREIRA, R. C.; DAVIDE, L. C.; TECHIO, V. H.; TIMBÓ, A. L. O. Duplicação cromossômica de gramíneas forrageiras: uma alternativa para programas de melhoramento genético. Ciência Rural, Santa Maria, v. 42, n. 7, p. 1278-1285, jul, 2012. |
Abstract: | The artificial obtaining of duplicate genotypes aims to maximize forage characteristics of agronomic interest, such as nutritional value and forage production, resistance against pests and diseases, abiotic stress tolerance and fertility restoration in sterile hybrids. It also aims to obtain genetic variability in apomictic species through chromosome doubling of the sexual accesses by equaling the ploidy in order to allow crossings and the obtaining of fertile descendents. The polyploidy induction is made using antimitotic substances, and colchicine is the most widely used in forage. However, due to its toxicity, other substances such as herbicides and caffeine has been used successfully for grasses. The efficiency in obtaining the polyploidy artificially depends on various exogenous factors, such as the antimitotic substances used, the kind of explants, the time and the exposure conditions and the antimitotic concentrations. This review aims to present the main methods used to induce polyploidy in grasses and the progress obtained in genetic breeding by the use of artificially duplicate genotypes. |
URI: | http://repositorio.ufla.br/jspui/handle/1/39008 |
Appears in Collections: | DBI - Artigos publicados em periódicos |
Files in This Item:
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ARTIGO_Duplicação cromossômica de gramíneas forrageiras - uma alternativa para programas de melhoramento genético.pdf | 207,23 kB | Adobe PDF | View/Open |
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