Optimum harvest maturity for guayule seed

Bedane, G.M.; Gupta, Mohit; George, D. L.

doi:10.1016/j.indcrop.2005.10.005

Cited by 23 publications

(7 citation statements)

References 14 publications

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“…This highlights the synergistic role of abscisic acid and K in osmoregulation, cell extension, assimilate translocation and enzyme system activation in cell growth (Zerche & Ewald 2005). Also seed mass, seed C and the other cations (Ca, Mg) are valuable predictors of optimal seed maturity, of which seed mass and C are the most easy to determine (see e.g ., Handley & Davy 2005; Bedane et al. 2006).…”

Section: Discussionmentioning

confidence: 99%

A latitudinal gradient in seed nutrients of the forest herb Anemone nemorosa

et al. 2010

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The nutrient concentration in seeds determines many aspects of potential success of the sexual reproductive phase of plants, including the seed predation probability, efficiency of seed dispersal and seedling performance. Despite considerable research interest in latitudinal gradients of foliar nutrients, a similar gradient for seeds remains unexplored. We investigated a potential latitudinal gradient in seed nutrient concentrations within the widespread European understorey forest herb Anemone nemorosa L. We sampled seeds of A. nemorosa in 15 populations along a 1900-km long latitudinal gradient at three to seven seed collection dates post-anthesis and investigated the relative effects of growing degree-hours >5 °C, soil characteristics and latitude on seed nutrient concentrations. Seed nitrogen, nitrogen:phosphorus ratio and calcium concentration decreased towards northern latitudes, while carbon:nitrogen ratios increased. When taking differences in growing degree-hours and measured soil characteristics into account and only considering the most mature seeds, the latitudinal decline remained particularly significant for seed nitrogen concentration. We argue that the decline in seed nitrogen concentration can be attributed to northward decreasing seed provisioning due to lower soil nitrogen availability or greater investment in clonal reproduction. This pattern may have large implications for the reproductive performance of this forest herb as the degree of seed provisioning ultimately co-determines seedling survival and reproductive success.

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Section: Discussionmentioning

confidence: 99%

A latitudinal gradient in seed nutrients of the forest herb Anemone nemorosa

et al. 2010

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“…However, farmers usually harvest seeds based on personal experience in hybrid rice production, which always leads to low seed quality and low crop yield due to improper harvest time. Since the 20th century, scientists have been studying the optimum harvest time according to seed morphological changes (seed color, weight and growth stages) or physiological variations (germination‐related indexes, moisture content and electrolyte leakage) during seed development . However, the parameters used to determine harvest time vary from one species to another.…”

Section: Introductionmentioning

confidence: 99%

Studies on optimum harvest time for hybrid rice seed

Cao²,

et al. 2016

J Sci Food Agric

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“…However, high‐quality seed for native grasses and other wild plants is difficult and expensive to produce (Dunne and Dunne, 2003; Cole and Johnston, 2006). Many native plants display active mechanisms of seed shattering that create a multitude of problems when these species are cultivated for seed (Berdahl and Frank, 1998; Kennard et al, 2002; Lemke et al, 2003; Bedane et al, 2005; Wang et al, 2008). Seed shattering can dramatically reduce yield if harvests are delayed for any reason, but the seed quality can be compromised if harvested before physiological maturity.…”

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confidence: 99%

Genetic Dissection of Seed Production Traits and Identification of a Major‐Effect Seed Retention QTL in Hybrid Leymus (Triticeae) Wildryes

Larson

Kellogg

2009

Crop Science

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Many native grasses display seed shattering and other seed production problems. Basin wildrye [Leymus cinereus (Scribn. & Merr.) Á. Löve] and creeping wildrye [L. triticoides (Buckley) Pilg.] are perennial Triticeae grasses native to western North America. In this study, variation in the number of florets per inflorescence, percent seed set, seed mass, seed shattering, and seed dormancy was measured in clonally replicated multiyear field evaluations of 164 progeny derived from a backcross between a creeping × basin wildrye hybrid and a true creeping wildrye tester. Genomewide quantitative trait locus (QTL) scans detected independent gene effects for all five traits and one pleiotropic QTL, located on Triticeae homeologous chromosome group 6, associated with major seed shattering (43.1% R2, 26.9 log of odds likelihood ratio [LOD]) and seed dormancy (24.1% R2, 10.6 LOD) effects. We hypothesize that a dominant basin wildrye gene creates an abscission that promotes seed disarticulation but hinders seed development and seed ripening in the creeping wildrye backcross family. Alignments of Leymus chromosome 6 expressed sequence tag markers to the rice (Oryza) genome reveal well‐defined correspondence of Leymus wildrye and American wildrice (Zizania palustris L.) seed shatter QTLs.

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Optimum harvest maturity for guayule seed

Cited by 23 publications

References 14 publications

A latitudinal gradient in seed nutrients of the forest herb Anemone nemorosa

A latitudinal gradient in seed nutrients of the forest herb Anemone nemorosa

Studies on optimum harvest time for hybrid rice seed

Genetic Dissection of Seed Production Traits and Identification of a Major‐Effect Seed Retention QTL in Hybrid Leymus (Triticeae) Wildryes

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