Publications (Clicking on the reprint icon will take you to the publication reprint.)

The South Florida Avocado Breeding Program at USDA-Agricultural Research Service Subtropical Horticulture Research Station (USDA-ARS SHRS) - (Peer Reviewed Journal)

Kuhn, D.N., Tondo, C.L., Freeman, B.L., Winterstein, M.C., Livingstone, D., Ayala Silva, T., Gutierrez, O.A., Schnell, R.J. 2012. The South Florida Avocado Breeding Program at USDA-Agricultural Research Service Subtropical Horticulture Research Station (USDA-ARS SHRS). California Avocado Commission. 2(1):22-29.

Molecular Characterization and Genetic Structure in Avocado (Persea americana Mill.) Using Simple Sequence Repeat (SSR) Markers - (Abstract Only)

Boza, E.J., Tondo, C.L., Kuhn, D.N., Meerow, A.W., Moore, J.M., Campbell, R.J., Ledesma, N., Gutierrez, O.A., Schnell, R.J. 2012. Molecular Characterization and Genetic Structure in Avocado (Persea americana Mill.) Using Simple Sequence Repeat (SSR) Markers. Annual International Plant & Animal Genome Conference. Annual International Plant & Animal Genome Conference, January 14-18, 2012, San Diego, CA.

Association mapping in cacao - (Abstract Only)

Gutierrez, O.A., Nagai, C., Heinig, R., Boza, E.J., Tondo, C.L., Motamayor, J.C., Schnell, R.J. 2012. Association mapping in cacao. Annual International Plant & Animal Genome Conference. XX Annual International Plant & Animal Genome Conference,January 14-18, 2012, San Diego, CA.

Spacial analysis of avocado sunblotch disease in an avocado germplasm collection - (Peer Reviewed Journal)

Schnell Ii, R.J., Tondo, C.L., Kuhn, D.N., Winterstein, M.C., Ayala Silva, T. 2011. Spacial analysis of avocado sunblotch disease in an avocado germplasm collection. Journal of Phytopathology. DOI: 10.1111/j.1439-0434.2011.01838.x.

Genetic diversity of mango cultivars estimated using Start Codon Targeted (SCoT) markers - (Peer Reviewed Journal) - (28-May-11)

SNP discovery in avocado from second generation sequencing of the leaf and flower transcriptome - (Abstract Only)

Kuhn, D.N., Livingstone, D., Mockaitis, K., Tondo, C.L., Schnell II, R.J. 2011. SNP discovery in avocado from second generation sequencing of the leaf and flower transcriptome. Annual International Plant & Animal Genome Conference. 2011.

Cocoa/Cotton Comparative Genomics - (Abstract Only)

ay, G.D., Mudge, J., Crow, J.A., Bharti, A.K., Woodward, J.E., Ramaraj, T., Farmer, A.D., Rice, B.J., Kramer, R.S., Wilkins, T.A., Schmutz, J., Kim, R.W., Mockaitis, K., Saski, C., Scheffler, B.E., Main, D., Jenkins, J., Livingstone, D., Zheng, P., Gilbert, D., Feltus, A., Haiminen, N., Parida, L., Tondo, C.L., Royaert, S.E., Phillips, W., Shapiro, H., Schnell, R.J., Kuhn, D.N., Motamayor, J. 2011. Cocoa/Cotton Comparative Genomics. Annual International Plant & Animal Genome Conference. 2011.

Genomics of Tropical Fruit Tree Crops - (Book / Chapter)

Arias De Ares, R.S., Borrone, J.W., Tondo, C.L., Kuhn, D.N., Schnell Ii, R.J. 2012. Genomics of Tropical Fruit Tree Crops. Book Chapter. In: Schnell, R.J., Priyadarshan, P.M., editors. Genomics of Tree Crops. Heidelberg, Germany: Springer. p. 209-239.

Better chocolate through genomics - (Popular Publication)

Schnell Ii, R.J., Tondo, C.L., Kuhn, D.N., Livingstone, D., Royaert, S.E., Motamayor, J.C. 2011. Better chocolate through genomics. Popular Publication. 1.

The value of wild Theobroma germplasm in genomics - (Abstract Only)

Schnell Ii, R.J., Kuhn, D.N., Tondo, C.L., Motamayor, J.C. 2010. The value of wild Theobroma germplasm in genomics. American Society of Horticulture Science Meeting. 1.

Results of the 2009 ASBVd survey of avocado accessions in the national germplasm collection in Florida - (Proceedings)

Tondo, C.L., Schnell Ii, R.J., Kuhn, D.N. 2011. Results of the 2009 ASBVd survey of avocado accessions in the national germplasm collection in Florida. Journal of Florida State Horticulture Society. 1.

Outcrossing in Florida and California commercial avocado (Persea americana Mill) orchards estimated using microsatellite markers and the development of a genetic linkage map - (Abstract Only) - (10-Jan-10)

The detection and utilization of disease resistance, quality, and productivity QTLs in cacao breeding - (Abstract Only)

Schnell Ii, R.J., Brown, J.S., Tondo, C.L., Kuhn, D.N., Phillips, W., Amores, F., Takrama, J., Motamayor, J.C. 2010. The detection and utilization of disease resistance, quality, and productivity QTLs in cacao breeding. Plant and Animal Genome Conference. 1.

The international marker assisted selection program for cacao - (Proceedings)

Schnell Ii, R.J., Motamayor, J.C., Brown, J.S., Kuhn, D.N., Tondo, C.L., Livingstone, D., Royaert, S.E., Nagai, C., Phillips, W., Amores, F., Suarez-Capello, C., Lopes, U., Takrama, J., Padi, F., Opoku, S., Efombagan, I.B., Aikpokpodion, P., Pokou, D., Epaina, P., Marfu, J. 2010. The international marker assisted selection program for cacao. Proceedings of the International Cocoa Producer's Conference.

Broad-sense heritability estimates for fruit color and morphological traits from open-pollinated half-sib mango families - (Peer Reviewed Journal)

Brown, J.S., Schnell Ii, R.J., Ayala Silva, T., Moore, J.M., Tondo, C.L., Winterstein, M.C. 2009. Broad-sense heritability estimates for fruit color and morphological traits from open-pollinated half-sib mango families. HortScience. 44(6):1-5.

Out-crossing between 'Bacon' pollinizers and adjacent 'Hass' avocado and the identification of two new avocado lethal mutants - (Peer Reviewed Journal)

Schnell Ii, R.J., Tondo, C.L., Brown, J.S., Ayala Silva, T., Borrone, J.W., Davenport, T.L., Kuhn, D.N. 2009. Out-crossing between 'Bacon' pollinizers and adjacent 'Hass' avocado trees and the description of two new lethal mutants. HortScience. 44(6):1522-1526.

Improvement of High-throughput Genotype Analysis After Implementation of a Dual-curve Sybr Green I-based Quantification and Normalization Procedure - (Peer Reviewed Journal)

Livingstone, D., Freeman, B.L., Tondo, C.L., Cariaga, K.A., Kuhn, D.N. 2009. Improvement of High-throughput Genotype Analysis After Implementation of a Dual-curve Sybr Green I-based Quantification and Normalization Procedure. HortScience. 44: 1228-1232.

Selection of Highly Informative Microsatellite Markers to Identify Pollen Donors in 'Hass' Avocado Orchards - (Peer Reviewed Journal)

Ying, Z., Davenport, T.L., Zhang, T., Schnell Ii, R.J., Tondo, C.L. 2009. Selection of Highly Informative Microsatellite Markers to Identify Pollen Donors in 'Hass' Avocado Orchards. Plant Mol Biol Rep 27:374-380

Increasing the efficiency of traditional cacao breeding using whole genome sequencing information. - (Abstract Only)

Schnell Ii, R.J., Brown, J.S., Kuhn, D.N., Tondo, C.L., Motamayor, H.Y., Shapiro, H., Scheffler, B., Main, D., Isidore, R. 2009. Increasing the efficiency of traditional cacao breeding using whole genome sequencing information.. Plant and Animal Genome Conference.

Re-evaluation of honeybees and wind on pollination of avocado - (Peer Reviewed Journal)

Ying, Z., Davenport, T.L., Faber, B., Zhang, T., Schnell Ii, R.J., Tondo, C.L. 2009. Re-evaluation of honeybees and wind on pollination of avocado. Journal of Horticultural Science and Biotechnology. 84(3)255-260.

An EST-SSR based linkage map for Persea americana Mill. (avocado) - (Peer Reviewed Journal)

Borrone, J., Brown, J.S., Tondo, C.L., Mauro-Herrera, M., Kuhn, D.N., Violi, H., Sautter, R.T., Schnell Ii, R.J. 2009. An EST-SSR based linkage map for Persea americana Mill. (avocado). Tree Genetics and Genomes. 10.1007/s11295-009-0208-y

Microsatellite markers reveal low breeding system efficacy and pollen contamination can limit production of full-sib avocado progeny - (Peer Reviewed Journal)

Violi, H.A., Brown, J.S., Tondo, C.L., Borrone, J.W., Ploetz, R., Schnell Ii, R.J. 2009. Microsatellite markers reveal low breeding system efficacy and pollen contamination can limit production of full-sib avocado progeny. Scientia Horticultureae. doi:10.1016/j.scienta.2008.11.011

A composite linkage map from the combination of three crosses made from commercial clones of cacao, T. cacao L. - (Peer Reviewed Journal)

Brown, J.S., Sautter, R.T., Tondo, C.T., Borrone, J.W., Kuhn, D.N., Motamayor, J.C., Schnell II, R.J. 2008. A composite linkage map from the combination of three crosses made from commercial clones of cacao, T. cacao L.. Tropical Plant Biology. DOI 10.1007/s12042-008-9011-4

Out-crossing in Florida avocados as measured using microsatellite markers - (Peer Reviewed Journal)

Borrone, J.W., Tondo, C.T., Kuhn, D.N., Brown, J.S., Schnell Ii, R.J., Violi, H.A. 2008. Out-crossing in Florida avocados as measured using microsatellite markers. J. Amer. Soc. Hort Sci. 133(2):255-261.

Development of marker assisted selection program for cacao - (Peer Reviewed Journal)

Schnell Ii, R.J., Kuhn, D.N., Brown, J.S., Tondo, C.T., Motamayor, J.C. 2007. Development of marker assisted selection program for cacao. Journal of Phytopathology. 97(12):1664-1669.

An estimation of outcrossing in Florida avocado (Persea americana Mill.) using microsatellite markers - (Proceedings)

Borrone, J.W., Olano, C.T., Kuhn, D.N., Brown, J.S., Violi, H., Ploetz, R., Schnell Ii, R.J. 2007. An estimation of outcrossing in Florida avocado (Persea americana Mill.) using microsatellite markers. Botanical Society of America Proceedings.

Development of Mapping Populations for Avocado. - (Proceedings)

Tondo, C.T., Borrone, J.W., Kuhn, D.N., Brown, J.S., Violi, H.A., Ploetz, R., Schnell Ii, R.J. 2007. Development of Mapping Populations for Avocado. Proceedings of Florida State Horticultural Society. 120:26-29

Integrating genomics into an applied cacao breeding program. - (Other)

Schnell Ii, R.J., Motomayor, J.C., Brown, J.S., Kuhn, D.N., Olano, C.T., Borrone, J.W., Ploetz, R., Rosenquist, E. 2007. Integrating genomics into an applied cacao breeding program.. Meeting Abstract.

Integrating genomics into an applied cacao breeding program. - (Other)

Schnell II, R.J., Motomayor, J.C., Brown, J.S., Kuhn, D.N., Olano, C.T., Borrone, J.W., Ploetz, R., Rosenquist, E. 2007. Integrating genomics into an applied cacao breeding program.. Meeting Abstract.

Cacao genomics and the development of a marker-assisted-selection program for cacao - (Abstract Only)

Schnell Ii, R.J., Kuhn, D.N., Brown, J.S., Tondo, C.T., Motamayor, J. 2007. Cacao genomics and the development of a marker-assisted-selection program for cacao. Plant and Animal Genome Conference Proceedings.

Development of Phytophthora root rot-resistant avocado rootstocks for the Caribbean. - (Proceedings)

Violi, H.A., Borrone, J.W., Ploetz, R., Olano, C.T., Schnell Ii, R.J. 2007. Development of Phytophthora root rot-resistant avocado rootstocks for the Caribbean.. Florida State Horticulture Society and Citrus Industry. 119:41-44

CURRENT CHALLENGES OF TROPICAL TREE CROP IMPROVEMENT: INTEGRATING GENOMICS INTO AN APPLIED CACAO BREEDING PROGRAM - (Peer Reviewed Journal)

Schnell II, R.J., Brown, J.S., Kuhn, D.N., Cervantesmartinez, C., Borrone, J.W., Olano, C.T., Motamayor, J.C., Phillips, W., Johnson, E., Monteverde-Penso, E.J., Amores, F., Lopes, U. 2007. Current challenges of tropical tree crop improvement: integrating genomics into an applied cacao breeding program. Acta Horticulturae: Proc IS on biotechnology of temperate fruit crops and tropical species. 738:p129-144.

Integrating genomics into applied tropical fruit breeding programs - (Abstract Only)

Schnell II, R.J., Motamayor, J., Brown, J.S., Kuhn, D.N., Cervantesmartinez, C., Olano, C.T., Ploetz, R.C., Ayala Silva, T. 2006. Integrating genomics into applied tropical fruit breeding programs. Meeting Abstract.

MANGO GENETIC DIVERSITY ANALYSIS AND PEDIGREE INFERENCES FOR FLORIDA CULTIVARS USING MICROSATELLITE MARKERS - (Peer Reviewed Journal)

Schnell II, R.J., Brown, J.S., Olano, C.T., Meerow, A.W., Campbell, R.J., Kuhn, D.N. 2006. Mango genetic diversity analysis and pedigree inferences for florida cultivars using microsatellite markers. Journal of the American Society for Horticultural Science. 131(2):214-224.

WHY WOULD BE BREED CACAO IN FLORIDA? - (Trade Journal)

Schnell II, R.J., Brown, J.S., Kuhn, D.N., Cervantes-Martinez, C.T., Olano, C.T., Motamayor, J. 2005. Why would be breed cacao in Florida?. Proceedings of Florida State Horticultural Society. 118:189-191.

PEDIGREE ANALYSIS OF FLORIDA MANGO CULTIVARS - (Trade Journal)

Olano, C.T., Schnell II, R.J., Quintanilla, W.E., Campbell, R.J. 2005. Pedigree analysis of Florida mango cultivars. Proceedings of Florida State Horticultural Society. 118:192-197.

ISOLATION AND CHARACTERIZATION OF 15 MICROSATELLITE LOCI FROM MANGO (MANGIFERA INDIA L.) AND CROSS-SPECIES AMPLIFICATION IN CLOSELY RELATED TAXA - (Peer Reviewed Journal)

Schnell II, R.J., Olano, C.T., Quintanilla, W.E., Meerow, A.W. Isolation and characterization of 15 microsatellite loci from mango (Mangifera India L.) and cross-species amplification in closely related taxa. Molecular Ecology Notes. 5:625-627.

ANALYSIS OF MOLECULAR DIVERSITY IN CRINIPELLIS PERNICIOSA WITH AFLP MARKERS - (Peer Reviewed Journal)

Ploetz, R.C., Schnell II, R.J., Ying, Z., Zheng, Q., Olano, C.T., Johnson, E. 2005. Analysis of molecular diversity in Crinipellis perniciosa with AFLP markers. European Journal of Plant Pathology. 111/4, pp. 317-326.

RETROSPECTIVE DETERMINATION OF THE PARENTAL POPULATION OF SUPERIOR THEOBROMA CACAO L. SEEDLINGS AND ASSOCIATION OF MICROSATELLITE ALLELES WITH PRODUCTIVITY - (Peer Reviewed Journal)

Schnell II, R.J., Olano, C.T., Brown, J.S., Meerow, A.W., Meneres, T., Nagai, C., Motamayor, J.C. 2005. Retrospective determination of the parental population of superior Theobroma cacao L. seedlings and association of microsatellite alleles with productivity. Journal of the American Society for Horticultural Science. 130(2):181-190.

FREQUENCY OF OFF-TYPE PROGENY AMONG THE ORIGINAL ICS1 X SCA6 RECIPROCAL FAMILIES MADE FOR SELECTION FOR DISEASE RESISTANCE IN TRINIDAD - (Trade Journal)

Schnell II, R.J., Heath, M., Johnson, E.S., Brown, J.S., Olano, C.T., Motamayor, J. 2004. Frequency of off-type progeny among the original ICS1 x SCA6 reciprocal families made for selection for disease resistance in Trinidad. Ingenic Newsletter. 9:34-39.

GERMPLASM AND GENOME RESOURCES IN THEOBROMA CACAO: CURRENT CHALLENGES OF TROPICAL TREE CROP BREEDING - (Proceedings)

Schnell II, R.J. 2004. Germplasm and genome resources in theobroma cacao: current challenges of tropical tree crop breeding. American Association for the Advancement of Science Meeting.

CAN MODERN PLANT SCIENCE DRIVE THE AGRO-ECOLOGY OF AN ANCIENT CROP? - (Proceedings)

Schnell II, R.J. 2004. Can modern plant science drive the agro-ecology of an ancient crop? Proceedings of the National Academy of Sciences.

EVALUATION OF AVOCADO GERMPLASM USING MICROSATELLITE MARKERS. - (Peer Reviewed Journal)

Schnell II, R.J., Brown, J.S., Olano, C.T., Power, E.J., Krol, C.A., Kuhn, D.N., Motamayor, J. 2003. Evaluation of avocado germplasm using microsatellite markers. American Society for Horticultural Science.

CURRENT STATUS OF ASBVD INFECTION AMONG AVOCADO ACCESSIONS IN THE NATIONAL GERMPLASM COLLECTION - (Proceedings)

Olano, C.T., Schnell II, R.J., Kuhn, D.N. 2002. Current status of ASBVd infection among avocado accessions in the national germplasm collection. Proceedings of Florida State Horticultural Society. 115: 280-282.

MITOCHONDRIAL DNA RESTRICTION MAP FOR THE CARIBBEAN FRUIT FLY, ANASTREPHA SUSPENSA, AND OCCURRENCE OF MITOCHONDRIAL DNA DIVERSITY WITHIN HIGHLY INBRED COLONIES. - (Peer Reviewed Journal)

HEATH, M.A., KUHN, D.N., SCHNELL II, R.J., OLANO, C.T. MITOCHONDRIAL DNA RESTRICTION MAP FOR THE CARIBBEAN FRUIT FLY, ANASTREPHA SUSPENSA, AND OCCURRENCE OF MITOCHONDRIAL DNA DIVERSITY WITHIN HIGHLY INBRED COLONIES.. BIOCHEMICAL GENETICS. 2002.

SEQUENCE DIVERSITY AMONG AVOCADO SUNBLOTCH VIROIDS ISOLATED FROM SINGLE AVOCADO TREES - (Peer Reviewed Journal)

SCHNELL II, R.J., KUHN, D.N., OLANO, C.T., QUINTANILLA, W.E. SEQUENCE DIVERSITY AMONG AVOCADO SUNBLOTCH VIROIDS ISOLATED FROM SINGLE AVOCADO TREES. PHYTOPARASITICA. 2001.