Registration of Q4188 and Q4205, Sexual Tetraploid Germplasm Lines of Bahiagrass

Quarín, Camilo Luis; Urbani, Mario Hugo; Blount, Ann R.; Martínez, Eric Javier; Hack, Claudina M.; Burton, Glenn W.; Quesenberry, K. H.

doi:10.2135/cropsci2003.0745

Cited by 50 publications

(48 citation statements)

References 4 publications

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“…A group was composed of three ESTG which was not considered a population but rather as a control of known low heterozygosity content. This group included a plant generated by chromosome doubling from a diploid plant (C4‐4 x ) (Quarin et al, ), a highly sexual white stigma bahiagrass (SWSB, also named Q3664), selected from an advanced hybrid progeny originally obtained by crossing a sexual colchicine‐induced tetraploid plant with a natural apomictic tetraploid bahiagrass bearing white stigmata (Burton & Forbes, 1960), and a sexual plant Q4205 obtained by self‐pollination from SWSB (Quarin et al, ). The second group was formed by 10 NATG collected along the natural distribution range of the species (Figure ).…”

Section: Methodsmentioning

confidence: 99%

Transference of natural diversity from the apomictic germplasm of Paspalum notatum to a sexual synthetic population

Zilli

Acuña

Schulz

et al. 2019

Annals of Applied Biology

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Genetic improvement in apomictic forage species has been restricted because of the absence of genetic variability in sexual germplasm with the same ploidy level. Following a new breeding scheme, a sexual synthetic tetraploid population (SSTP) of Paspalum notatum has been generated. The objectives of this work were: (a) to evaluate the genetic variability in SSTP by means of molecular markers, morphologic and agronomic traits, and seed fertility and quality traits and (b) to assess the transference of genetic variability from the apomictic germplasm to the sexual one. Molecular markers revealed a twofold higher level of variability in the SSTP in comparison with the sexual germplasm utilised for its generation, and similar levels with the apomictic ones; moreover, markers showed that most of the variability was inherited from the apomictic germplasm. Morphologic and agronomic traits and seed fertility and quality traits showed high levels of variation in the three groups of genotypes indicating that the new breeding scheme was effective in transferring variability from the apomictic germplasm to the SSTP. This new population will be useful in breeding of P. notatum, and the breeding scheme used for its generation may be used in other apomictic species. K E Y W O R D Sfertility, genetic improvement, genetic variability, microsatellite markers, sexuality

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Section: Methodsmentioning

confidence: 99%

Transference of natural diversity from the apomictic germplasm of Paspalum notatum to a sexual synthetic population

Zilli

Acuña

Schulz

et al. 2019

Annals of Applied Biology

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“…Three tetraploid sexual genotypes, Q4188, Q4205 (Quarín et al, 2003), and C44X (Quarín et al, 2001), were obtained in collaboration with the Botanical Institute of Northeast Argentina (IBONE), Corrientes, Argentina, and were crossed with elite tetraploid germplasm native to the state of Rio Grande do Sul ecotypes Bagual and André da Rocha. The crosses were performed using the methodology described by Burton (1948) in order to obtain a hybrid progeny.…”

Section: Methodsmentioning

confidence: 99%

Intraspecific tetraploid hybrids of Paspalum notatum: agronomic evaluation of segregating progeny

Weiler

Dall'Agnol

Simioni

et al. 2018

Sci. agric. (Piracicaba, Braz.)

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For many decades, animal production in southern Brazil has been based on native forage grasses. Paspalum notatum Flügge (bahiagrass) is one of the most frequently used native grass in southern Brazil. The native germplasm of P. notatum is tetraploid and displays apomictic reproduction; hence, chromosome doubling of sexual diploid accessions is required to facilitate hybridization. The main goal of this study was to evaluate forage production and other agronomical evaluation of P. notatum intraspecific hybrids in order to obtain new varieties that could be registered and/or protected and launched as new cultivars in the future. Three tetraploid sexual genotypes were crossed with the ecotypes Bagual and André da Rocha. Biomass production (leaf, stem, and inflorescence fractions), plant growth habit, plant height, number of tillers, and frost damage were evaluated in the resulting hybrids. The general combining ability (GCA) and specific combining ability (SCA) were calculated for the six families generated. We evaluated 196 hybrids and the most productive yielded 42 % more total dry mass than the most productive parent (ecotype Bagual), and Bagual production was seven-fold higher than that of cultivar 'Pensacola'. The highest GCA values were observed for Bagual and Q4205. No correlation was observed between leaf coloration and the frost effect or regrowth in the following winter.Similarly, no correlation between plant growth habit and dry mass production was observed. The reproduction mode of the most productive hybrids are currently being analyzed in larger plots to identify apomictic and sexual genotypes for future registration and protection.

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“…An AFLP progeny test estimated the genetic/genotypic variation of Boyero UNNE, its male parent Q4117, and a sexual tetraploid germplasm line, Q4205. Previous reports based on cytoembryological studies had indicated that Q4205 was a 100% sexual reproducing genotype (Quarin et al, 2003) and that Q4117 was a highly apomictic genotype with a potential for sexual reproduction of 3.7 to 8% (Martínez et al, 2001). The possibility of sexual reproduction of Boyero UNNE varied from 7 to 14%, as indicated above.…”

Section: Characteristics and Discussionmentioning

confidence: 99%

“…A set of comparative progeny tests with AFLP markers was conducted to estimate the genetic/genotypic variation of Boyero UNNE, its apomictic male parent, Q4117, and a sexual plant, Q4205. Genotype Q4205 is a 100% sexual tetraploid germplasm line, selected among progeny of the self-pollinated plant Q3664 (Quarin et al, 2003). Progenies of Boyero UNNE, Q4117, and Q4205 were obtained from seed produced under open pollination.…”

Section: Reproductive Modementioning

confidence: 99%

Registration of ‘Boyero UNNE’ Bahiagrass

Urbani

Acuña

Doval

et al. 2016

J of Plant Registrations

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‘Boyero UNNE’ (Reg. No. CV‐5, PI 676021) bahiagrass (Paspalum notatum Flüggé) was registered with the National Register of Plant Cultivars and the National Register of Property for Plant Cultivars, Ministry of Agriculture, Livestock Exploitations, and Fisheries of Argentina, Resolution no. 276 in August 2012 (Reg. No. 3213) and released by the National University of the Northeast (UNNE), Faculty of Agricultural Sciences (FCA), Corrientes, Argentina. Boyero UNNE is a tetraploid, highly apomictic F1 hybrid developed between an experimentally obtained female parent, reproducing sexually, and an apomictic, wild bahiagrass genotype. It is the first registered cultivar of a tetraploid apomictic P. notatum developed by breeding through a sexual × apomictic hybridization scheme, exploiting apomixis and plant selection in the F1 progeny. The new cultivar has a more upright growing habit than tetraploid bahiagrass cultivars currently in use or wild tetraploid biotypes. It can produce approximately 19% more forage dry matter than its apomictic male parent, largely exceeding (20–51%) the wild bahiagrass type currently found in natural pasturelands of northeastern Argentina, and it produced 4 to 26% more than the cultivar Argentine at three locations in Florida, USA.

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Registration of Q4188 and Q4205, Sexual Tetraploid Germplasm Lines of Bahiagrass

Cited by 50 publications

References 4 publications

Transference of natural diversity from the apomictic germplasm of Paspalum notatum to a sexual synthetic population

Transference of natural diversity from the apomictic germplasm of Paspalum notatum to a sexual synthetic population

Intraspecific tetraploid hybrids of Paspalum notatum: agronomic evaluation of segregating progeny

Registration of ‘Boyero UNNE’ Bahiagrass

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