Obtaining sexual genotypes for breeding in buffel grass

Quiroga, M.; Grunberg, Karina; Ribotta, A.; Colomba, E. López; Carloni, E.; Tommasino, E.; Luna, Claudia Verónica; Griffa, S.

doi:10.1016/j.sajb.2013.04.016

Cited by 10 publications

(19 citation statements)

References 19 publications

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“…This level of polymorphism is higher than that previously reported for buffelgrass (Griffa et al, 2006;Kharrat-Souissi et al, 2011;Quiroga et al, 2013) and napiergrass (Pennisetum purpureum Schum.) The number of bands identified by each primer ranged from 74 to 117 with a mean of 93.4 bands per primer.…”

Section: Resultscontrasting

confidence: 64%

Genetic Diversity among Pentaploid Buffelgrass Accessions

et al. 2015

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Buffelgrass [Pennisetum ciliare (L.) Link (syn. Cenchrus ciliaris L.)], an important pasture and range grass in the arid semi‐tropics and tropics, has excellent drought‐tolerance but lacks winter hardiness. It is a polymorphic, apomictic species and its most common chromosome number is 2n = 4x = 36. Eighty‐six pentaploid (2n = 5x = 45) accessions from South Africa were deposited into the USDA National Germplasm System (NPGS) in 1976 and these were more winter‐hardy than all tetraploid accessions. Prior to 1976, only 31 pentaploids were in the NPGS but they lacked cold tolerance. Since 1976, ten pentaploid accessions with unknown cold tolerance have been added to the NPGS and they were included. The genetic diversity among all these pentaploid accessions was investigated to determine if the winter‐hardy and non‐winter‐hardy genotypes were distinct. Amplified fragment length polymorphisms were used to determine the genetic diversity and phylogenetic relationships among the accessions. Ten primer combinations generated 862 polymorphic bands; the number of bands identified by each primer ranged from 74 to 117 (mean 93.4). Unweighted pair group method with arithmetic mean (UPGMA) cluster analysis and principal coordinate analysis revealed two groups with one separating into two sub‐groups and one sub‐group separating into two subdivisions. Genetic similarity coefficients ranged from 0.39 to 0.98 (mean 0.74). These findings show considerable genetic diversity among the pentaploid accessions. Most cold‐tolerant and non‐cold‐tolerant genotypes separated by subgroups but not by group. Nine tetraploid accessions, included for reference, clustered into several subgroups. The pentaploid genotypes appear to have polyphyletic origins.

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Section: Resultscontrasting

confidence: 64%

Genetic Diversity among Pentaploid Buffelgrass Accessions

et al. 2015

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“…Smaller varieties (< 90 cm) are typically grown for sheep and goat pasture, erosion control, being mostly suitable for light-textured soils, less tolerant to flooding, and poorly developed rhizome (MARSHALL; LEWIS; OSTENDORF, 2012). Nonetheless, according to Quiroga et al (2013), these materials would be advantageous because their smaller size would be beneficial for photosynthate use, perspiration reduction, and hence increased water use efficiency.…”

Section: Univariate Analysis For Quantitative Descriptorsmentioning

confidence: 99%

“…For NI, we noted a great variation, with plants producing 4 to 120 inflorescences per plant. Larger numbers of inflorescences per plant would probably increase the number of spikelets available for crossing (for crossbred plants) (QUIROGA et al, 2013). Furthermore, according to Griffa et al (2012), it would also increase seed yield.…”

Section: Univariate Analysis For Quantitative Descriptorsmentioning

confidence: 99%

BUFFEL GRASS MORPHOAGRONOMIC CHARACTERIZATION FROM Cenchrus GERMPLASM ACTIVE BANK

et al. 2017

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-This study aimed to characterize buffel grass accessions of the Cenchrus Germplasm Active Bank (CGAB) from Embrapa Semi-Arid in a morphoagronomic way, checking the descriptors variability and efficiency in accessions on two consecutive cuts. Twenty-five accessions and five buffel grass cultivars were used in randomized complete block design with three replications. Evaluations were conducted after two consecutive cuts, each evaluation performed 90 days after each cut. Characterization was based on 15 quantitative and qualitative morphoagronomic descriptors. Quantitative descriptors were subjected to individual and joint univariate analysis of variance, followed by the Scott-Knott's test at 5% significance. Yet qualitative descriptors were submitted to descriptive analysis. Both quantitative and qualitative descriptors were grouped based on the Gower algorithm for divergence analysis. A dendrogram and calculations of the characters relative importance for divergence were established. Genotype and cutting effects were significant for almost all descriptors in the joint analysis. This result indicates a genetic variability between genotypes and, regarding the cut, it indicates mainly differences in growth rate of each genotype in each cutting season. Genotypes were separated into three groups, which showed good genotype variation. The number of tillers per clump, followed by number of inflorescence and color of seeds, were the most relevant characters in genotype separation.

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“…Es ampliamente utilizada en regiones áridas, semiáridas y desérticas del mundo (Dixon y Coates, 2010;Carvalho de Silva et al, 2011;Marshall et al, 2012). Se caracteriza por tener buena producción de forraje (Gómez de la Fuente et al, 2007), evita la erosión del suelo (Bhattarai et al, 2008) y es tolerante a sequías (Quiroga et al, 2013).…”

Section: Introductionunclassified

“…It is widely used in arid, semi-arid and desert regions of the world (Dixon and Coates, 2010;Carvalho de Silva et al, 2011;Marshall et al, 2012). It is characterized by good forage production (Gómez de la Fuente et al, 2007), avoids soil erosion (Bhattarai et al, 2008) and is tolerant to drought (Quiroga et al, 2013).…”

Section: Introductionmentioning

confidence: 99%