Kent J. Bradford
Professor and Vice Chair for Teaching and Curriculum
1107 Plant Reproductive Biology
MS Michigan State University Horticulture 1977
of California, Davis Plant Physiology 1981
Postdoctoral Fellow, Australian National
Assistant Professor, Dept. of Vegetable Crops, UC Davis 1982-87
Associate Professor, Dept. of Vegetable Crops, UC Davis 1987-91
Sabbatical CSIRO, Canberra, Australia, and 1990-91 Univ. of Western Sydney,
Visiting Scientist, Horticulture Research International 1991 Wellesbourne, U.K.
Professor, Dept. of Vegetable Crops, UC Davis 1991-present
Chair, Dept. of Vegetable Crops, UC Davis 1993-1998
Director, Seed Biotechnology Center, UC Davis 1999-present
Professor, Dept. of Plant Sciences, 2005-present
Vice Chair for Teaching and Curriculum Development, Dept. of Plant Sciences,
Awards and Honors
Vegetable Research Trust, Horticulture Research International, Wellesbourne,
Visiting Lectureship, Wageningen Agricultural University, The Netherlands,
Fulbright Scholar, Universidad Nacional de Cuyo, Mendoza, Argentina,
Career Seed Science Award, Crop Science Society of America,
Fellow, American Association for the Advancement of Science, 2003
Adjunct Professor, Xishuangbanna Tropical Botanical Garden, Yunnan, People’s
Republic of China, 2004-6
Invited Visiting Professor, University of Pierre and Marie Curie, Paris, June
2005; June 2007
Award of Distinction, Faculty, College of Agricultural and Environmental
Sciences, UC Davis, October 2007
Editorial and Professional
Founding Trustee and Secretary of the
International Society for Seed Science, 1999-2004
USDA-NRICGP Grant Review Panel, Plant Genome, 2000
Associate Editor, Seed Science Research, 2003-2006
Editorial Board, Journal of Experimental Botany, 1994-present
Editorial Board, Seed Science Research, 1994-present
Monitoring Editor, Plant Physiology, 1995-2000
Associate Editor, Crop Science, 1992-1995
Member, U.S. Plant Variety Protection Advisory
My research interests are in all aspects
of seed biology, from the molecular biology and physiology of seed development,
dormancy and germination to the storage, enhancement and utilization of seeds
for agricultural purposes. My disciplinary expertise is primarily in plant
water relations and the hormonal regulation of plant growth and development and
more recently in plant biotechnology. I recently co-edited a book (with H.
Nonogaki) on Seed Development, Dormancy
and Germination that presents a current update on this field.
Genetics, molecular biology and
biochemistry of seed germination and dormancy.
We are taking a genetic approach to investigating the basis of seed dormancy
and other domestication-related traits in lettuce and sunflower. We are
participating in a major genomics project in the Compositae that has generated
a large number of ESTs in these species and other Compositae species (http://compgenomics.ucdavis.edu/).
Using recombinant inbred lines (RILs), we are identifying quantitative trait
loci (QTL) associated with seed vigor and dormancy phenotypes in lettuce (Argyris
et al., 2005). We have identified a major QTL (Htg6.1) that controls the upper temperature limit for germination
of lettuce seeds. Lettuce seeds exhibit thermodormancy, or a failure to
germinate when imbibed at temperatures above 25-30 °C, which limits stand
establishment in warm season plantings. We are currently fine mapping this QTL
and have studied its effects on the biosynthesis and metabolism of
gibberellins, abscisic acid and ethylene, which are involved in regulating seed
germination in response to environmental factors (Argyris
et al., 2008). This work is supported by a NSF grant with five co-PIs (R.
Michelmore, UC Davis; L. Rieseberg, U. British Columbia; S.
Knapp, U. Georgia; R. Kesseli, U. Mass.; D. Still, Cal Poly Pomona).
Radicle emergence depends upon the
balance of forces between the pressure exerted by the radicle and the
resistance to penetration of the endosperm or other tissues enclosing the
embryo. The endosperm cap enclosing the embryo must weaken in order for the
radicle to penetrate it and complete germination. Research has therefore
focused on cell wall hydrolases that might degrade the endosperm cell walls.
Since the endosperm cell walls are composed largely of mannans,
endo-β-mannanase is a likely candidate. We have shown that a mannanase
gene (LeMAN2) is specifically expressed in the endosperm cap prior to
radicle emergence, while a second mannanase gene (LeMAN1) is expressed
in the remaining endosperm after radicle emergence (Nonogaki
et al., 2000). Xyloglucan endotransglycosylase (LeXET4), b-1,3-glucanase
(GluB), chitinase (Chi9), and an expansin (LeEXP4) genes
also show endosperm cap-specific expression (Chen and
Bradford, 2000; Chen et al., 2002; Wu et al., 2001). Other genes are expressed in
the embryo or in all seed tissues, including an exo-polygalacturonase (LeXPG1),
a vacuolar ATPase subunit (LVA-P1), and additional expansins (LeEXP8,
LeEXP10) (Cooley et al., 1999; Sitrit et al., 1999; Chen et al., 2001). In each case, we have
investigated how these genes are regulated by water potential, GA, ABA and other factors
that influence germination and dormancy. Particularly intriguing is our
discovery that expression of a subunit of a protein kinase involved in
sugar-sensing and metabolic regulation (LeSNF4) is regulated by ABA (Bradford et al., 2003). These studies were
supported by NSF and USDA-NRICGP grants.
Modeling of germination in seed
We have developed mathematical models that describe the germination and
dormancy behavior of seeds on a population basis (e.g., Bradford,
1995, 2002). Application of this model has
provided a comprehensive physiological explanation for the responses of seed
germination to temperature, for example (Alvarado
and Bradford, 2002; 2005).
These models have also led to novel concepts of variable time scales in plant
development (Bradford and Trewavas, 1994). For example, plant growth rates vary
at different temperatures, which can be viewed as altering the time scale on
which growth is occurring. Similarly, we have found that developmental rates
(i.e., progress toward radicle emergence) at different water potentials,
hormone concentrations (abscisic acid, gibberellin) or oxygen partial pressures
can also be analyzed as if they occur on dosage-dependent variable time scales
(Ni and Bradford, 1993; Dahal and Bradford, 1994; Bradford
et al., 2007; Bradford
et al., 2008). Hormone-deficient mutants and single-seed assays have been
valuable experimental tools in this work (Still and Bradford, 1997). These
models have also been applied to study seed dormancy in ecological settings (Bradford,
2005; Allen et al., 2007). The
combination of population-based statistics and reciprocity between dosage of a
regulatory factor and time to response results in a powerful analytical
framework having considerable explanatory power not only for seeds, but also
for describing many phenomena at the cell and tissue levels. These studies have
been supported by NSF grants.
Seed Quality, Enhancement and
We have worked for many years on the quality of seeds for planting and on
ways to measure, preserve and enhance seed quality. Seed priming is a technique
involving controlled hydration of seeds to initiate germinative metabolism,
then drying seeds for distribution and planting. Seeds treated in this way
exhibit more rapid germination and reduced dormancy under adverse conditions
(Cheng and Bradford, 1999). However, they also often have reduced longevity in
storage. Recently we have been studying possible causes for reduced longevity
of primed seeds, including possible roles for oligosaccharides and heat-shock
proteins (Gurusinghe and Bradford, 2001; Gurusinghe et al., 2002). These studies have also
included investigations of the cell cycle during priming and germination
(Gurusinghe et al., 1999) and of the enzymes involved in potentially protective
oligosaccharide biosynthesis (Downie
et al., 2003). Current studies are looking at how priming and drying
conditions affect seed longevity (Schwember
and Bradford, 2005; Hill
et al., 2007). This work is supported by the Western Regional Seed
Physiology Research Group, a collaborative group of seed and seed technology
In 1999, I founded and have since been
director of the Seed
This is a unit of the College of Agricultural and Environmental Sciences whose
mission is to mobilize the research, educational, and outreach resources of the
University of California in partnership with the seed biotechnology industry to
develop and commercialize new germplasm and seed technologies for agricultural
and consumer benefit. We take a broad view of the term
"biotechnology" and do not limit it to genetic engineering. Many
types of "biological technology" must be integrated in order to
deliver a seed product having enhanced value to the market. Thus, in addition
to genetics and breeding, improved seed production methods, enhanced seed
quality, crop protection chemicals, planting technology and other requirements
of seeds as multipurpose crop genetic delivery systems must also be considered.
A major goal is to speed the utilization and commercialization in crop plants
of information derived from basic research and model systems. We are developing
molecular marker systems for a number of crops, including cotton, tomato,
potato, pepper, lettuce and carrot. The Seed Biotechnology
service and outreach activities are described in more detail on our web site: http://sbc.ucdavis.edu.
Of particular interest among the SBC’s
programs is the Plant Breeding Academy. This program is designed for
professionals in the seed industry who wish to advance their knowledge and
skill as plant breeders. The program consists of six intensive weeks of study
over two years. Details can be found at http://pba.ucdavis.edu.
I teach Professionalism and Ethics in
Genomics and Biotechnology (BIT 171), a required course for undergraduates in
the Biotechnology major. Each fall I lead a graduate seminar on the scientific
method and philosophy of science (Special Topics in Scientific Method, PBI
223). I co-authored a chapter in the textbook on Crops, Genes and Plant
Biotechnology (Bradford and Bewey, 2003).
Publications (since 1997)
(of 117 total)
Dahal, P., Hayashi, E., Still, D.W., and Bradford, K.J. (2008) Genetic
variation for lettuce seed thermoinhibition is associated with
temperature-sensitive expression of abscisic acid, gibberellin and ethylene
biosynthesis, metabolism and response genes. Plant Physiol.
2008. Shang Fa Yang: Pioneer in plant ethylene biochemistry. Plant Science 175: 2-7.
Benech-Arnold, R., Côme, D., and Corbineau, F. 2008. Quantifying the
sensitivity of barley seed germination to oxygen, abscisic acid and gibberellin
using a population-based threshold model. J. Exp. Bot. 59: 335-347.
Moravec, C.M., Bradford, K.J., and Laca, E.A. 2008. Water relations of
drumstick tree seed (Moringa oleifera): imbibition, desiccation, and
sorption isotherms. Seed Sci. & Technol. 36: 311-324.
Dahal, P., Truco, M.J., Ochoa, O., Still. D.W., Michelmore, R.W., and Bradford, K.J. 2007. Genetic analysis of lettuce seed
thermoinhibition. Acta Hortic.782:
Bradford, K.J., Hall, L., Hellmich, R., Raybould, A., Wolt, J., and Zilberman,
D. 2007. Implications of Gene Flow in the Scale-up and Commercial Use of
Biotechnology-derived Crops: Economic and Policy Considerations. Council
for Agricultural Science and Technology (CAST), Issue Paper 37. CAST, Ames,
Cunningham, J.D., Bradford, K.J., and Taylor,
A.G. 2007. Primed lettuce seeds exhibit increased sensitivity to moisture
content during controlled deterioration. HortScience 42: 1436-1439.
N., Alston, J.M., and Bradford, K.J. 2007.
Compliance costs for regulatory approval of new biotech crops. Nature Biotech. 25: 509-511.
Bradford, K.J., Côme, D.,
and Corbineau, F. (2007) Quantifying the oxygen sensitivity of seed germination
using a population-based threshold model. Seed Sci. Res. 17:
Alston, J.M., Bradford, K.J., and Kalaitzandonakes, N. (2006) The
economics of horticultural biotechnology. J. Crop
Improvement 18: 413-431.
Truco, M.J., Ochoa, O., Knapp, S.J., Still, D.W., Lenssen, G.M., Schut, J.W.,
Michelmore, R.W., and Bradford, K.J. (2005)
Quantitative trait loci associated with seed and seedling traits in Lactuca. Theor.
Appl. Genet. 111: 1365-1376.
Heesacker, A., Freeman, C., Argyris, J., Bradford,
K.J., Knapp, S.J. 2005. The self-incompatibility locus (S) and quantitative
trait loci for self-pollination and seed dormancy in sunflower. Theor. Appl. Genet. 111: 619-629.
Van Deynze, A.E.,
Sundstrom, F.J., and Bradford, K.J. 2005.
Pollen-mediated gene flow in California
cotton depends upon pollinator activity. Crop Sci. 45:1565–1570.
and Bradford, K.J. 2005. Drying rates following priming affect temperature
sensitivity of germination and longevity of lettuce seeds. HortScience
Alvarado, V., and Bradford, K.J. 2005. Hydrothermal time analysis of seed
dormancy in true (botanical) potato seeds. Seed Science Research 15: 77-88.
Bradford, K.J., Van
Deynze, A., Gutterson, N., Parrott, W., Strauss, S.H. 2005. Regulating
transgenic crops sensibly: lessons from plant breeding, biotechnology and
Biotechnol. 23: 439-444.
Gurusinghe, S.H., Bradford, K.J., and
Vázquez-Ramos, J.M. 2005. Differential response of PCNA and CDK-A proteins and associated
kinase activities to benzyladenine and abscisic acid during maize seed
Exp. Bot. 56: 515-523.
2005. Threshold models applied to seed germination ecology. New
Phytol. 165: 338-341.
Bradford, K.J., and
Alston, J.M. 2004. Horticultural biotechnology: challenges for commercial
Horticulturae 44: 4-8.
Kende, H., Bradford, K.J., Brummell, D.A., Cho, H.T., Cosgrove,
D.J., Fleming, A.J., Gehring, C., Lee, Y., McQueen-Mason, S., Rose, J.K.C.,
Voesenek, L.A.C.J. 2004. Nomenclature
for members of the expansin superfamily of genes and proteins. Plant Mol. Biol.
Bradford, K.J., Alston,
J.M, Lemaux, P.G. and Sumner, D.A. 2004. Challenges and opportunities for
horticultural biotechnology. California
Agriculture 58: 68-71. (Co-editor of entire issue)
Bradford, K.J., and Still,
D.W. 2004. Applications of hydrotime analysis in seed testing. Seed
Technology 26: 75-85.
Wu, C.T., and Bradford, K.J. 2003. Class I chitinase and
beta-1,3-glucanase are differentially regulated by wounding, methyl jasmonate,
ethylene and gibberellin in tomato seeds and leaves. Plant
Physiol. 133: 263-273.
Cullen, S.E., Bradford, K.J., Zilberman, D.,
Bennett, A.B. 2003. The public-private structure of intellectual property
ownership in agricultural biotechnology. Nature
Biotech. 21: 989-995.
Downie, A.B., Gee, O.H., Alvarado, V.Y., Yang, H., Dahal, P. 2003. Abscisic
acid and gibberellin differentially regulate expression of genes of the
SNF1-related kinase (SnRK1) complex in tomato seeds. Plant Physiol. 132: 1560-1576.
Nonogaki, H., Beers, E.P., Bradford, K.J., Welbaum, G.E. 2003. Characterization
of chitinase activity and gene expression in muskmelon seeds. Seed Sci. Res. 13: 167-178.
Gurusinghe, S., Dahal, P., Thacker, R.R., Snyder, J.C., Nonogaki, H., Yim, K.,
Fukanaga, K., Alvarado, V., Bradford, K.J. 2003. Expression of a galactinol
synthase gene in tomato is up-regulated before maturation desiccation and again
after imbibition whenever radicle protrusion is prevented. Plant Physiol. 131:
Alvarado, V., and Bradford, K.J. 2002. A hydrothermal time model explains
the cardinal temperatures for seed germination. Plant Cell and Environ. 25: 1061-1069.
Powell, A.L.T., and Bradford, K.J. 2002.
Enhanced expression of BiP is associated with treatments that extend storage
longevity of primed tomato seeds. J. Amer. Soc. Hortic. Sci. 127: 528-534.
Bradford, K.J. 2002.
Applications of hydrothermal time to quantifying and modeling seed germination
and dormancy. Weed
Science 50: 248-260.
Nonogaki, H., and Bradford, K.J. 2002. A gibberellin-regulated xyloglucan
endotransglycosylase gene is expressed in the endosperm cap during tomato seed
germination. J. Exp. Bot. 53:
Stodolski, L., Mari, J., Gurusinghe, S.H. and Bradford,
K.J. 2001. Viability constants for delphinium and salvia seeds. Seed Technology
Chen, F., Dahal,
P., and Bradford, K.J. 2001. Two tomato expansin genes show divergent
expression and localization in embryos during seed development and germination.
Plant Physiol. 127 :
Edelstein, M., Bradford, K.J. and Burger, D.W. 2001. Metabolic heat and
CO2 production rates during germination of melon (Cucumis
L.) seeds measured by microcalorimetry. Seed Sci. Res. 11: 265-272.
Leubner-Metzger, G., Meins, F. Jr. and Bradford K.J. 2001. Class I b-1,3-glucanase and chitinase are expressed
specifically in the micropylar endosperm of tomato seeds prior to radicle
Physiol. 126: 1299-1313.
and Bradford, K.J. 2001. Galactosyl-sucrose oligosaccharides and potential
longevity of primed seeds. Seed Sci. Res. 11: 121-133.
Chen, F., and
Bradford, K.J. 2000. Expression of an expansin is associated with endosperm
weakening during tomato seed germination. Plant Physiol. 124: 1265-1274.
Nonogaki, H., Gee,
O.H., and Bradford, K.J. 2000. A
germination-specific endo-b-mannanase gene is
expressed in the micropylar endosperm cap of tomato seeds. Plant Physiol. 123: 1235-1245.
Yang, H., Dahal, P. Mella, R.A., Downie, B., Haigh, A.M., and Bradford,
K.J. 1999. Vacuolar H+-ATPase is expressed in response to gibberellin during
tomato seed germination. Plant Physiol. 121: 1339-1347.
Hadfield, K.A., Bennett, A.B., Bradford, K.J.,
and Downie, B. 1999. Expression of a polygalacturonase associated with tomato
seed germination. Plant Physiol 121: 419-428.
Gurusinghe, S.H., and Bradford, K.J. 1999.
Internal anatomy of individual tomato seeds: relationship to abscisic acid and
germination physiology. Seed Sci. Res. 9: 117-128.
Cheng, Z., and Bradford, K.J. 1999. Hydrothermal time analysis of tomato
seed germination responses to priming treatments. J. Exp. Bot. 50: 89-99.
Cheng, Z., and Bradford, K.J. 1999. Cell cycle
activity during seed priming is not essential for germination advancement in
tomato. J. Exp. Bot. 50: 101-106.
Downie, B., Dirk,
L.M.A., Hadfield, K.A., Wilkins, T.A., Bennett, A.B., and Bradford,
K.J. 1998. A gel diffusion assay for quantification of pectin methylesterase activity.
Anal. Biochem. 264: 149-157.
Yim, K.-Y., and Bradford, K.J. 1998. Callose deposition is responsible
for apoplastic semipermeability of the endosperm envelope of muskmelon seeds.
Plant Physiol. 118: 83-90.
Still, D.W., and Bradford, K.J. 1998. Using hydrotime and ABA-time models
to quantify seed quality of brassicas during development. J. Amer. Soc. Hort.
Sci. 123: 692-699.
Bradford, K.J., and Cohn.
MA. 1998. Seed biology and technology: At the crossroads and beyond. Seed Sci.
Res. 8: 153-160.
Allen, P.S., Bennett, M.A., Bradford, K.J.,
Burris, J.S., and Misra, M.K. 1998. Seed enhancements. Seed Sci. Res. 8:
Welbaum, G.E., Bradford, K.J., Yim, K.-O., Booth, D.T., and Oluoch M.O.
1998. Biophysical, physiological and biochemical processes regulating seed
germination. Seed Sci. Res. 8: 161-172.
Gurusinghe, S., Plopper, C., Bradford, K.J., Greenwood, J.S., and Bewley, J.D. 1997.
Elongated cells adhering to the megagametophyte and sheathing the radicle of
white spruce following completion of germination are derived from the embryo
root cap. Int. J. Plant Sci.: 158: 738-746.
Dahal, P., Nevins,
D.J., and Bradford, K.J. 1997. Relationship of endo-b-d-mannanase activity and cell wall hydrolysis in tomato endosperm to
germination rates. Plant Physiol 113: 1243-1252.
Dahal, P., and Bradford, K.J. (1997) A
single-seed assay for endo-beta-mannanase activity from tomato endosperm
and radicle tissues. Plant Physiol. 113: 13-20.
Still, D.W., and Bradford, K.J. (1997) Endo-beta-mannanase activity from
individual tomato endosperm caps and radicle tips in relation to germination
rates. Plant Physiol. 113: 21-29.
Dutta, S., Bradford, K.J., and Nevins, D.J. 1997. Endo-b-mannanase activity present in cell wall extracts of lettuce (Lactuca
sativa L.) endosperm prior to radicle emergence. Plant Physiol. 113: 155-161.
Bradford, K.J. and Nonogaki, H., eds. 2007. Seed Development, Dormancy
and Germination. Blackwell Publishing, Oxford, U.K.
Nicolás, G., Bradford,
K.J., Côme, D., and Pritchard, H.W., eds. 2003. The Biology of Seeds: Recent
Research Advances, CAB International, Wallingford,
Black, M., Bradford,
K.J., and Vazquez-Ramos, J., eds. 2000. Seed Biology: Advances and
Applications, CAB International, Wallingford,
Book Chapters (22 total):
Allen, P.S., Benech-Arnold, R.L., Batlla, D.
and Bradford, K.J. 2007. Modeling of seed dormancy. In Bradford, K.J., and
Nonogaki, H., eds, Seed
Development, Dormancy and Germination, Blackwell Publishing, Oxford, U.K.,
Nonogaki, H., Chen, F. and Bradford,
K.J. 2007. Mechanisms and genes involved in germination sensu stricto. In
Bradford, K.J., and Nonogaki, H., eds, Seed Development, Dormancy and
Germination, Blackwell Publishing, Oxford, U.K.,
Bradford, K.J. 2007. Seed
biotechnology: Translating promise into practice. In S. Adkins, S. Ashmore and S.
Navie, eds., Seeds: Biology, Development and Ecology, CAB International,
Wallingford, U.K., pp. 130-138.
Bradford, K.J. 2006. Germination: internal
factors affecting (physical, physiological, molecular and biochemical). In
Bewley, J.D., Black, M., and Halmer, P., eds., The Encyclopedia of Seeds:
Science, Technology and Uses. CABI Publishing, Wallingford, UK.
Kalaitzandonakes, N., Alston, J.M., and Bradford, K.J. 2006. Compliance costs for regulatory
approval of new biotech crops. In Just, R., Alston, J.M., and Zilberman, D.,
eds., Regulating Agricultural Biotechnology: Economics and Policy, Springer
Publishers, New York.
Bradford, K.J., Alston, J.M., and Kalaitzandonakes,
N. 2006. Regulation of biotechnology for specialty crops. In Just, R., Alston,
J.M., and Zilberman, D., eds., Regulating Agricultural Biotechnology: Economics
and Policy, Springer Publishers, New
Bradford, K.J. 2006. Seed biotechnology: Translating
promise into practice. In S. Navie, S. Adkins, and S. Ashmore, eds., Seeds:
Biology, Development and Ecology, CAB International, Wallingford, U.K.,
De Castro, R.D., Bradford, K.J., and
Hilhorst, H.W.M. 2004. Desenvolvimento e conteúdo de água [Development and
water content]. In A.G. Ferreira and F. Borghetti, eds., Germinação, Artmed
Editoria S.A., Porto Alegre-RS, Brasil, pp. 51-67.
De Castro, R.D., Bradford, K.J., and
Hilhorst, H.W.M. 2004. Embebição e reativação do metabolismo [Imbibition and
reactivation of metabolism]. In A.G. Ferreira and F. Borghetti, eds.,
Germinação, Artmed Editoria S.A., Porto Alegre-RS, Brasil, pp. 149-162.
Nonogaki, H., and Bradford, K.J. 2003. Tissue
printing for localization of mRNA expression in seeds. In Nicolás, G.,
Bradford, K.J., Côme, D., and Pritchard, H.W., eds., The Biology of Seeds:
Recent Research Advances, CAB International, Wallingford, U.K. In press.
Bradford, K.J. and Bewley, J.D. 2002. Seeds: Biology,
Technology and Role in Agriculture. Chapter 9 in M.J. Chrispeels and D.E.
Sadava, eds., Plants, Genes and Crop Biotechnology, 2nd Edition, Jones and Bartlett, Boston.
Alvarado, V., Nonogaki, H., and Bradford,
K.J. 2000. Expression of endo-b-mannanase and SNF-related protein kinase
genes in true potato seeds in relation to dormancy, gibberellin and abscisic
acid. In J.D. Viemont and J. Crabbé, eds, Dormancy in Plants, CAB
International, Wallingford, U.K., pp. 347-364.
Bradford, K.J., Chen, F., Cooley, M.B., Dahal, P.,
Downie, B., Fukunaga, K.K., Gee, O.H., Gurusinghe, S., Mella, R.A., Nonogaki,
H., Wu, C.-T., and Yim, K.-O. 2000. Gene expression prior to radicle emergence
in imbibed tomato seeds. In: M. Black, K.J. Bradford, and J. Vazquez-Ramos,
eds., Seed Biology: Advances and Applications, CABI, Wallingford, U.K.,
Bradford, K.J. 1997. The hydrotime concept in seed
germination and dormancy. In R.H. Ellis, M. Black, A.J. Murdoch, and T.D. Hong,
eds., Basic and Applied Aspects of Seed Biology. Kluwer Academic Publishers, Boston, pp. 349-360.
Kozik, A., R.W. Michelmore, Knapp, M.S.
Matvienko, L. Rieseberg, H. Lin, M. van Damme, D. Lavelle, P. Chevalier, J.
Ziegle, P. Ellison, J. Kolkman, M.S. Slaubaugh, K. Livingston, L. Z. Zhou, S.
Church, S. Edberg, L. Jackson and K. Bradford et al. 2002. Lettuce
and sunflower ESTs from the Compositae Genome Project. http://compgenomics.ucdavis.edu/
Extension bulletins and publications (9 total):
Van Deynze, A., and Bradford,
K.J. 2006. Academic training of plant breeders no longer meets demand. Seed World
Bradford, K.J. 2006. Methods to maintain
genetic purity of seed stocks. University
of California, Division
of Agriculture and Natural Resources, Publication 8189.
Bradford, K.J. 2005. Biotech seed
traceability & labeling: hindrance or asset to marketing and trade? Seed World
Van Deynze, A., Bradford,
K.J., and Van Eenennaam, A. 2004. Crop biotechnology: Feeds for livestock.
Division of Agriculture and Natural Resources, Agricultural Biotechnology in California Series,
Thomas, B.R., Van Deynze, A., and Bradford, K.J. 2002. Production of therapeutic proteins
in plants. University of California, Division of Agriculture and Natural
Resources, Agricultural Biotechnology in California
Series, Publication 8078. http://anrcatalog.ucdavis.edu
Sundstrom, F.J., Williams, J., Van Deynze,
A., and Bradford, K.J. 2002. Identity
preservation of agricultural commodities. University
of California, Division of Agriculture
and Natural Resources, Agricultural Biotechnology in California Series, Publication
Suslow, T.V., B.R. Thomas and K.J. Bradford.
2002. Biotechnology provides new tools for plant breeding. University of California,
Division of Agriculture and Natural Resources, Agricultural Biotechnology in California Series, Publication 8043. http://anrcatalog.ucdavis.edu
Voss, R.E., Murray,
M., Bradford, K.J., Mayberry, K.S., and Miller, I.
1999. Onion seed production in California.
University of California, Division of Agriculture and
Natural Resources, Publication 8008. http://anrcatalog.ucdavis.edu
Murray, M., Hartz, T.K., and Bradford,
K.J. 1997. Cucurbit seed production in California.
University of California, Division of Agriculture and
Natural Resources, Publication 7229. http://anrcatalog.ucdavis.edu