Genetic variability in natural populations of Paspalum dilatatum Poir. analyzed by means of morphological traits and molecular markers

García, María Victoria; Balatti, Pedro Alberto; Arturi, Miguel Jacinto

doi:10.1007/s10722-006-9147-8

Cited by 21 publications

(14 citation statements)

References 17 publications

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“…More recently, genetic variability has also been reported within the pentaploid biotype (Machado et al ., ; Speranza, , ). Morphological and physiological variability has also been reported among P. dilatatum biotypes, including tiller and panicle length (García et al ., ), forage yield and grazing tolerance (Venuto et al ., ), and response to water stress (Couso et al ., ). Similarly, differences have been reported in percentage of spikelets with caryopses and germination rate among some biotypes (Souza‐Chies and Cavalli‐Molina, ; Tischler and Burson, ; Pitman et al ., ).…”

Section: Introductionmentioning

confidence: 99%

Variability in germination behaviour ofPaspalum dilatatumPoir. seeds is genotype dependent

Glison

Viega

Cornaglia

et al. 2014

Grass and Forage Science

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Dallisgrass (Paspalum dilatatum Poir.) is a warm‐season grass, native to South America. Its adoption as a pasture crop has been hindered by low seed germination and slow establishment. However, variability in germination behaviour for this species has never been systematically analysed. For Paspalum spp., dry‐storage and moist cold or warm pre‐conditioning treatments have been reported as effective for the relief or breaking of seed dormancy. In the present work, seed germination responses at 32°C were assayed for sixteen P. dilatatum genotypes, representing its known natural genetic variability, to two moist pre‐conditioning treatments (at 5 and 20°C) and without pre‐conditioning, and three seed storage periods (0, 3 and 6 months). Pre‐conditioning at 20°C showed high germination percentages (>80%), with ratios equal to or higher than pre‐conditioning at 5°C, suggesting that cold is not required to break dormancy. Longer storage times resulted in increases in germination responses for most of the genotypes, while other biotypes showed no effect. Biotypes Virasoro and Chirú showed a remarkably different behaviour with higher germination percentages of untreated freshly harvested seeds. Our results show that diversity for traits involved in seed germination exists among naturally occurring P. dilatatum genotypes and the characterization of these traits should be addressed during ecotype characterization and evaluation of potential domesticates of this species.

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Section: Introductionmentioning

confidence: 99%

Variability in germination behaviour ofPaspalum dilatatumPoir. seeds is genotype dependent

Glison

Viega

Cornaglia

et al. 2014

Grass and Forage Science

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“…Agronomic traits, especially those related to root quality are very important for grouping genetic resources and are also essential to the improvement of existing varieties by introducing novel genetic variation. However, clusters formed by agronomic traits were not in accordance with molecular marker data (Esmaeilzadeh et al, 2005;Garcia et al, 2007;Barakat et al, 2013).…”

Section: Future Perspectivesmentioning

confidence: 88%

Genotypic variation of traits related to quality of cassava roots using affinity propagation algorithm

Oliveira

Santana

Oliveira

et al. 2015

Sci. agric. (Piracicaba, Braz.)

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The conservation, sustainable evaluation and use of cassava (Manihot esculenta Crantz) genetic resources are essential to the development of new commercial varieties. This study aimed to evaluate the quality of cassava roots and to estimate genetic variation and clustering in cassava germplasm using the Affinity Propagation algorithm (AP), which is based on the concept of "message passing" between data points. AP finds "exemplars" of each group and members of the input set representative of clusters. The genotypic data of 474 cassava accessions were evaluated over a period of two years for starch yield (StYi), root dry matter (DMC), amylose content (AML), and the level of cyanogenic compounds (CyC). The AP algorithm enabled the formation of nine diversity groups, whose number reflects the high genetic diversity of this germplasm. A high homogeneity of genetic distances was observed within all the groups, except for two groups in which there was a partial overlap caused mainly by a high variation of the CyC trait. In addition, no relationship between the genetic structure and CyC (sweet and bitter cassava) was observed. Analysis of variance of the nine clusters confirmed the presence of differences between the groups. Thus, the results of this study can be used in future breeding programs (hybridization or selection) to introduce new genetic variability into commercial cultivars to avoid problems related to low genetic variation and to improve the quality of cassava roots.

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“…El ADN genómico total fue extraído empleando el protocolo de extracción ROSE (Steiner et al, 1995) modificado por García et al (2007). Se amplificaron tres loci microsatélites cloroplásticos Ccmp4, Ccmp5 y Ccmp7 mediante cebadores universales desarrollados por Weising & Gardner (1999).…”

Section: Polimorfismo En Loci Microsatélites De Adn Cloroplástico (Cpunclassified

Demografía histórica de Anadenanthera colubrina var. cebil (Leguminosae) en Argentina.

Barrandeguy¹,

Prado²,

Goncalves³

et al. 2016

Bol. Soc. Argent. Bot.

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Summary: Historical demography in Anadenanthera colubrina var. cebil (Leguminosae) from Argentina. Anadenanthera colubrina var. cebil is a South American native tree species which characterizes the Seasonally Dry Tropical Forests (SDTFs). These forests are in disjunct patches along the Neotropics. The influence of past climatic fluctuations on the current distribution of these forests deserves several interpretations because the tropical climatic conditions were unstable during Cenozoic. The aim of this study is identify traces of demographical-historical events on current patterns of chloroplastic genetic variation in Argentinean natural populations of A. colubrina var. cebil in order to make inferences about the temporal development of these forests. Population genetic and demographic analyses from genetic variation in three chloroplastic loci were performed. The current distribution of chloroplastic haplotypes of A. colubrina var. cebil shows clear traces of historical fragmentation between the nuclei of these forests. The Andean Piedmont nucleus maintains traces of later expansion after it arrives to the region, whereas the Misiones nucleus shows historical stability.Key words: Anadenanthera colubrina var. cebil, cpSSRs, expansion, fragmentation, SDTFs.Resumen: Anadenanthera colubrina var. cebil es una especie nativa sudamericana que caracteriza a los Bosques Secos Estacionales Neotropicales, los cuales se presentan en parches disyuntos dispersos a lo largo del Neotrópico. La influencia de las fluctuaciones climáticas del pasado sobre la distribución actual de dichos bosques ha merecido diferentes interpretaciones, debido a que se postula que las condiciones climáticas tropicales no fueron estables durante el Cenozoico. El objetivo de este estudio es identificar rastros de eventos demográfico-históricos sobre los patrones contemporáneos de la variación genética cloroplástica en poblaciones naturales argentinas de A. colubrina var. cebil, al efecto de hacer inferencias acerca del desarrollo temporal de estos bosques en nuestro país. Se realizaron análisis genético poblacionales y demográficos a partir de la variación genética identificada mediante tres loci microsatélites cloroplásticos. La distribución contemporánea de haplotipos cloroplásticos de A. colubrina var. cebil retiene rastros de la fragmentación histórica entre los núcleos de estos bosques, mientras que el núcleo Pedemontano Subandino retiene rastros de una expansión posterior a su llegada a la región en tanto que el núcleo Misiones presenta estabilidad histórica.

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Genetic variability in natural populations of Paspalum dilatatum Poir. analyzed by means of morphological traits and molecular markers

Cited by 21 publications

References 17 publications

Variability in germination behaviour ofPaspalum dilatatumPoir. seeds is genotype dependent

Variability in germination behaviour ofPaspalum dilatatumPoir. seeds is genotype dependent

Genotypic variation of traits related to quality of cassava roots using affinity propagation algorithm

Demografía histórica de Anadenanthera colubrina var. cebil (Leguminosae) en Argentina.

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