Bahiagrass

Gates, Robert J.; Quarín, Camilo Luis; Pedreira, Carlos Guilherme Silveira

doi:10.2134/agronmonogr45.c19

Cited by 42 publications

(44 citation statements)

References 79 publications

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“…Paspalum notatum Flüggé is a warm‐season perennial grass native to Central and South America and particularly predominant on the grasslands of southern Brazil, Paraguay, Uruguay and northern Argentina (Gates, Quarin, & Pedreira, ). It is cultivated as forage and utility turf around the world (Blount & Acuña, ).…”

Section: Introductionmentioning

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: Introductionmentioning

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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“…The increase in plant density of bahiagrass over time was expected because seeds of bahiagrass germinate gradually (Gates & Mullahey, 1997;Gates et al, 2004). According to West and Marousky (1989), the delay in germination may be related to physiological processes affecting embryo maturity and physical barriers present in the seed preventing its imbibition and growth.…”

Section: Discussionmentioning

confidence: 99%

“…Bahiagrass seedlings are small (Gates et al, 2004), and the fre- Reasons for the seeding strategy × N fertilization strategy interaction affecting pintoi peanut ground cover are not clear. The lack of response to N in the presence of bahiagrass might be related to the greater capacity of grasses to retain fertilizer N when in greater proportion in grass-legume mixtures (Nyfeler, Huguenin-Elie, Suter, Frossard, & Lüscher, 2011).…”

Section: Discussionmentioning

confidence: 99%

“…According to Skinner (2005), the composition of mixed forage swards is critically dependent on plant-to-plant interactions during the establishment phase, with some positive and negative effects of mixed seeding being observed in temperate forages. As reviewed by Gates, Quarin, and Pedreira (2004), bahiagrass also has slow establishment, mostly due to dormancy of the seeds and the low vigour and size of the seedlings. The slow initial establishment of bahiagrass may minimize the competition and could represent an opportunity for legumes planted simultaneously to spread and assure a greater initial proportion in the canopy.…”

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Seeding strategies of bahiagrass and pintoi peanut affect pasture establishment under weed competition

Sanchez

Vendramini

Silveira

et al. 2019

Grass and Forage Science

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Pintoi peanut (Arachis pintoi Krapov. & W.C. Greg.) is a warm‐season perennial legume with potential for use in grass–legume mixtures in Florida; however, limited information exists about its establishment in mixtures with bahiagrass (Paspalum notatum Flügge). The objective of this experiment was to evaluate the establishment of bahiagrass cv. “Argentine” and pintoi peanut cv. “Amarillo” as monocultures or mixture. The experiment was conducted in Ona, FL, from June to October of 2014 and 2015. Treatments were a split‐plot design of seeding strategies (bahiagrass monoculture, pintoi peanut monoculture or bahiagrass‐pintoi peanut mixtures; main plots) and two N fertilization strategies (30 or 80 kg/ha N; 30N and 80N; subplots), with four replicates. Measurements of plant density and frequency were taken every 4 weeks after seeding. Ground cover and herbage mass (HM) measurements were taken 112 days after seeding. Pintoi peanut ground cover was affected by seeding strategy × N level interaction. Ground cover was greater with 80N than 30N when pintoi was seeded in monoculture (3.6% vs 1.5% respectively) but not when it was seeded with bahiagrass (2.1%). There was no effect of seeding or N strategy on pintoi peanut proportion in HM (1.4%). Bahiagrass ground cover was not affected by seeding or N strategy (15.9%); however, its proportion in the HM was greater in 80N than 30N (12.1% vs 9.4% respectively). Mixed seeding did not negatively affect the establishment of bahiagrass and pintoi peanut and greater N fertilization levels improved some establishment parameters, with no negative effect for pintoi peanut.

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“…only a limited number of Paspalum cultivars have been released as improved forage grasses, and most are naturally occurring apomictic ecotypes that were selected because of their superior productivity (Evers and Burson, 2004;Gates et al, 2004). The only improved Paspalum forage cultivars developed through breeding are several sexual diploid bahiagrass (Paspalum notatum Flügge) cultivars that were derived from sexual diploid Pensacola bahiagrass germplasm (Gates et al, 2004).…”

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Storage of Bahiagrass Pollen at Different Temperatures

et al. 2018

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Paspalum is an important genus of grasses, and some species are used for forage in the warmer regions of the world. Efforts to develop improved cultivars often require intra‐ and interspecific hybridization, but asynchronous flowering sometimes prevents hybridization between parental species. One method of circumventing this problem is to store pollen using cryopreservation so pollen will be available to pollinate the female parent when it flowers. Bahiagrass (Paspalum notatum Flügge) was used to determine if Paspalum pollen can be preserved using long‐term cold storage. Pollen was dehydrated with LiCl, MgCl2, NaOH, and silica gel for 30, 60, and 120 min. Both dehydrated and nondehydrated pollen were stored at 4, −20, and −196°C for 10, 60, 120, and 180 d. After thawing, pollen stainability and in vivo germination were used to assess viability. Stainability of fresh pollen was 73.3%, and for treated and stored pollen, it ranged from 25.3 to 71.3%. Storage at −20 and −196°C was superior to storage at 4°C. Pollen dehydrated with LiCl for 30 min stored best at −196°C; pollen dehydrated for 120 min with silica gel and for 30 and 60 min with MgCl2 stored best at −20°C. All samples regardless of treatment, storage temperature, or length of storage had viable pollen. These findings demonstrate that bahiagrass pollen can be stored in long‐term cold conditions, and this procedure can be used to circumvent problems associated with asynchronous flowering between parental species used in wide hybridization programs.

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Bahiagrass

Cited by 42 publications

References 79 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

Seeding strategies of bahiagrass and pintoi peanut affect pasture establishment under weed competition

Storage of Bahiagrass Pollen at Different Temperatures

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