Emergence and stand establishment of pearl millet as affected by mesocotyl elongation and other seed and seedling traits

Mohamed, A. K. A.; Barnett, F. L.; Vanderlip, R. L.; Khaleeq, B.

doi:10.1016/0378-4290(89)90022-1

Cited by 3 publications

(1 citation statement)

References 7 publications

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“…Additionally, studies in rice, wheat, and castor bean have evaluated seedling length, seedling weight, and growth rate (Hughes and Mitchel, 1987;Zhou et al, 2010;Abe et al, 2012;Guo et al, 2019). In wheat, coleoptile length has been implicated in seedling vigor (Rebetzke et al, 2007;Li et al, 2014), while in rice and pearl millet, mesocotyl elongation has been implicated in seedling vigoran important aspect of successful stand establishment (Mohamed et al, 1989;Lee et al, 2012;Ohno et al, 2018). Genetic studies in rice and wheat have found quantitative trait loci (QTL) associated with seedling vigor (Zhang et al, 2005;Spielmeyer et al, 2007;Zhou et al, 2007;Landjeva et al, 2010).…”

Section: Conclusion and Recommendationsmentioning

confidence: 99%

Evaluation of shoot-growth variation in diverse carrot (Daucus carota L.) germplasm for genetic improvement of stand establishment

Loarca,

Liou,

Dawson

et al. 2024

Front. Plant Sci.

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Carrot (Daucus carota L.) is a high value, nutritious, and colorful crop, but delivering carrots from seed to table can be a struggle for carrot growers. Weed competitive ability is a critical trait for crop success that carrot and its apiaceous relatives often lack owing to their characteristic slow shoot growth and erratic seedling emergence, even among genetically uniform lines. This study is the first field-based, multi-year experiment to evaluate shoot-growth trait variation over a 100-day growing season in a carrot diversity panel (N=695) that includes genetically diverse carrot accessions from the United States Department of Agriculture National Plant Germplasm System. We report phenotypic variability for shoot-growth characteristics, the first broad-sense heritability estimates for seedling emergence (0.68 < H2 < 0.80) and early-season canopy coverage ( 0.61 < H2 < 0.65), and consistent broad-sense heritability for late-season canopy height (0.76 < H2 < 0.82), indicating quantitative inheritance and potential for improvement through plant breeding. Strong correlation between emergence and canopy coverage (0.62 < r < 0.72) suggests that improvement of seedling emergence has great potential to increase yield and weed competitive ability. Accessions with high emergence and vigorous canopy growth are of immediate use to breeders targeting stand establishment, weed-tolerance, or weed-suppressant carrots, which is of particular advantage to the organic carrot production sector, reducing the costs and labor associated with herbicide application and weeding. We developed a standardized vocabulary and protocol to describe shoot-growth and facilitate collaboration and communication across carrot research groups. Our study facilitates identification and utilization of carrot genetic resources, conservation of agrobiodiversity, and development of breeding stocks for weed-competitive ability, with the long-term goal of delivering improved carrot cultivars to breeders, growers, and consumers. Accession selection can be further optimized for efficient breeding by combining shoot growth data with phenological data in this study’s companion paper to identify ideotypes based on global market needs.

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Section: Conclusion and Recommendationsmentioning

confidence: 99%

Evaluation of shoot-growth variation in diverse carrot (Daucus carota L.) germplasm for genetic improvement of stand establishment

Loarca,

Liou,

Dawson

et al. 2024

Front. Plant Sci.

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Seedling Root and Coleoptile Length as Selection Criteria for Field Emergence in Pearl Millet

M'Ragwa

Watson

Gourley

2001

Journal of Sustainable Agriculture

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Planting Time For Early‐Season Pearl Millet and Grain Sorghum in Nebraska

2003

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Pearl millet [Pennisetum glaucum (L.) R. Br.] is a potential crop for the Great Plains, but there are few studies on production practices. The research objective was to determine the optimal planting time for pearl millet in Nebraska relative to sorghum [Sorghum bicolor (L.) Moench]. This would optimize pearl millet yields, thus increasing the prospect for pearl millet as a crop. Studies were conducted on Sharpsburg silty clay loam (fine, smectitic, mesic, Typic Argiudoll) and Ortello sandy loam (coarse‐loamy, mixed, mesic, Udic Haplustoll) soils between 1995 and 2001. Optimal planting times were determined by relating yields with calendar date, cumulative air heat units, cumulative soil heat units, and soil temperatures. Relative yields related to air or soil heat units were effective in determining the optimal planting time. Optimum pearl millet planting times were 399 air heat units or 410 soil heat units after 1 April for the Sharpsburg soil and 406 soil heat units for the Ortello soil. The optimal sorghum planting time was 308 air heat units or 307 soil heat units after 1 April for the Sharpsburg soil and 402 air heat units after 1 April for the Ortello soil. Both crops had large planting time windows, allowing flexibility in planting time. Sorghum outyielded pearl millet for May and early‐to mid‐June planting times by 0.57 to 2.32 Mg ha−1 while pearl millet had higher yields by 0.95 to 1.20 Mg ha−1 for late June and July planting times. Sorghum produced greater yields than pearl millet for most planting times while pearl millet produced greater yields than sorghum for very late planting times.

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Emergence and stand establishment of pearl millet as affected by mesocotyl elongation and other seed and seedling traits

Cited by 3 publications

References 7 publications

Evaluation of shoot-growth variation in diverse carrot (Daucus carota L.) germplasm for genetic improvement of stand establishment

Evaluation of shoot-growth variation in diverse carrot (Daucus carota L.) germplasm for genetic improvement of stand establishment

Seedling Root and Coleoptile Length as Selection Criteria for Field Emergence in Pearl Millet

Planting Time For Early‐Season Pearl Millet and Grain Sorghum in Nebraska

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