Effect of tiller age and time of nitrogen stress on seed production of <i>Paspalum plicatulum</i>

Chadhokar, P. A.; Humphreys, L. R.

doi:10.1017/s002185960005886x

Cited by 7 publications

(5 citation statements)

References 9 publications

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“…Sward age has a strong effect on Paspalum SY, and greater seed production has been observed in the first year of production. Previous research on P. plicatulum (Chadhokar & Humphreys, 1973) and P. notatum (Rios et al., 2020) showed most of the response variables, except seed weight, exhibited significantly better performance during the first year of production. Therefore, productive behavior over time requires more research.…”

Section: Discussionmentioning

confidence: 82%

Seed yield and quality of interspecific hybrids of Paspalum plicatulum × P. guenoarum at different harvest times

Scienza,

Antoniolli,

Longhi

et al. 2024

Crop Science

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Paspalum guenoarum is a warm‐season perennial grass, with a caespitose growth habit. The species is native to southern Brazilian grasslands and has been used in interspecific hybridizations because of its high palatability, resistance to trampling and grazing, and cold tolerance. Previous studies reported improvements in forage production and the nutritive value of hybrid material. However, there are limited data about seed production and seed quality of these hybrids. The aim of this study was to quantify the optimal time to harvest seed of three Paspalum plicatulum × P. guenoarum hybrids (08Q01, 104026, and 105052). Seed yield and seed quality were determined. Hybrids were harvested at 10, 20, and 30 days after flowering and evaluated for the components of seed yield, vigor, and viability. The optimum time to harvest was 20 days after the beginning of flowering. A >50% yield reduction, due to seed shattering, occurred when harvesting was delayed beyond 20 days. Harvesting <20 days after flowering resulted in a high percentage of empty spikelets and seeds with low vigor and viability. About 75% of the seed shattering took place 10–20 days after flowering, and for the 104026 and 105052 hybrids, >50% of seed was during this period. Hybrid 105052 had superior seed yield (2380 ± 280 kg ha−1) and similar seed quality. These two characteristics, among others, are the most important ones when recommending a new commercial cultivar for release.

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Section: Discussionmentioning

confidence: 82%

Seed yield and quality of interspecific hybrids of Paspalum plicatulum × P. guenoarum at different harvest times

Scienza,

Antoniolli,

Longhi

et al. 2024

Crop Science

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“…In Exp. 3 (1969 and1970), herbage was cut back in all treatments on the same base date (Ti). In Exp.…”

Section: Resultsmentioning

confidence: 99%

“…There was no evi dence that late N increased 1000-grain weight. In Paspalum plicatulum, Chadhokar and Humphreys (1970) observed that seed production was independent of N nutrition after head emergence.…”

Section: Discussionmentioning

confidence: 99%

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Experimental studies on seed production of tropical grasses in Kenya. 5. The effect of time of nitrogen top dressing on seed crops of Setaria sphacelata cv. Nandi.

Boonman¹

1972

NJAS

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Effects of date of applying top-dressings of N to early-season and late-season seed crops of Setaria sphacelata cv. Nandi were studied in 4 trials in 1967-71. Highest seed yields were obtained when N was applied as soon as possible after the onset of the rainy season; a delay of 4 weeks reduced yields of pure germinating seed by >60%. Total yields of herbage DM and number of heads were also reduced, but to a lesser extent; the main adverse effect was on seed set/head. In late-season crops, applying N 2 weeks after the earliest possible date proved beneficial in 2 out of 3 years. (Abstract retrieved from CAB Abstracts by CABI’s permission)

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“…In addition to climatic conditions, sward age has been reported as a factor with a strong effect on Paspalum seed yield. Chadhokar and Humphreys (1973) reported that Paspalum plicatulum Michx. produced a higher seed set during the first year of seed production.…”

Section: Discussionmentioning

confidence: 99%

Seed yield and quality of Paspalum notatum Flügge intraspecific hybrids

Souza,

Motta,

Brunes

et al. 2023

Acta Sci. Agron.

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Bahiagrass (Paspalum notatum Flügge) is an important forage in South America and the United States because of its high palatability, resistance to trampling and grazing, and tolerance to cold, but it exhibits low seed yield and poor seed quality. Previous studies reported improvements in forage production and nutritive value in hybrids and ecotypes; however, information about seed yield and quality in forage bahiagrass is limited. This study aimed to characterize the seed yield and quality of nine P. notatum intraspecific hybrids and three controls: P. notatum ecotypes V4 and Bagual and cultivar Pensacola. Inflorescence density, 1,000-seed weight, seed yield and germination rate decreased in year 2 influenced by weather conditions and ergot. Seed yield ranged from 139 (Pensacola) to 1,158 (Bagual) kg ha-1 among all entries, where Bagual, C18, and V4 produced more than 974 kg ha-1, which was approximately seven times more than Pensacola. Bagual, C18, V4, 336, C15, 225, and D3 showed germination rates greater than 83%. In conclusion, Bagual had the highest seed yield and germination rate, whereas hybrids C18 and 336 showed high seed yield, 1,000-seed weight, and germination rate in both years. Bagual, C18, and 336 should be used in future breeding programs to improve seed production traits. Our study revealed that selection for seed production traits can result in improvements in seed yield and quality in bahiagrass.

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Effect of tiller age and time of nitrogen stress on seed production of Paspalum plicatulum

Cited by 7 publications

References 9 publications

Seed yield and quality of interspecific hybrids of Paspalum plicatulum × P. guenoarum at different harvest times

Seed yield and quality of interspecific hybrids of Paspalum plicatulum × P. guenoarum at different harvest times

Experimental studies on seed production of tropical grasses in Kenya. 5. The effect of time of nitrogen top dressing on seed crops of Setaria sphacelata cv. Nandi.

Seed yield and quality of Paspalum notatum Flügge intraspecific hybrids

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