Lukaszewski, A. J.,
K. Rybka, V. Korzun, S. V. Malyshev, B. Lapinski, and R. Whitkus.
2004. Genetic and physical mapping of homoeologous recombination
points involving wheat chromosomes 2B and rye chromosome 2R. Genome 47: 36-45. abstract
Ehdaie, B., R.
Whitkus and J. G. Waines. 2003. Root biomass, water-use
efficiency and performance of wheat-rye translocations of chromosomes 1
and 2 in spring bread wheat ‘Pavon’. Crop Science 43:
710-717. abstract
Georgiady, M. S., R.
Whitkus and E. M. Lord. 2002. Genetic analysis of traits
distinguishing outcrossing and self-pollinating forms of currant
tomato, Lycopersicon
pimpinellifolium (Jusl.) Mill. Genetics 161:
333-344. abstract PDF
Whitkus, R., H.
Doan, and T. K. Lowrey. 2000. Genetics of adaptive radiation in
Hawaiian
species of Tetramolopium (Asteraceae). III. Evolutionary
genetics
of sex expression. Heredity 85: 37-42. abstract
Okada, M., T. K.
Lowrey, and R. Whitkus. 2000. Quantitative morphological variation in Tetramolopium
(Asteraceae) in Hawaii and the Cook Islands. Plant Systematics and
Evolution 221:1-13. abstract
Brunell, M. S., A.
Lukaszewski, and R. Whitkus. 1999. Development of arm specific RAPD
markers for rye chromosome 2R in wheat. Crop Science
39:1702-1706. abstract
Heaton, H. J., R.
Whitkus, and A. Gómez-Pompa. 1999. Extreme ecological and
phenotypic differences in the tropical tree chicozapote (Manilkara
zapota (L.) van Royen) are not matched by genetic divergence: A
RAPD
analysis. Molecular Ecology 8: 627-632.
Brunell, M. S. and
R. Whitkus. 1999. Analysis of cross-compatibility in Eriastrum
densifolium (Polemoniaceae). Plant Systematics and Evolution
215: 241-254. abstract
Brunell, M. S. and
R. Whitkus. 1998. Assessment of morphological variation in Eriastrum
densifolium (Polemoniaceae): Implications for subspecific
delimitation and conservation. Systematic Botany 23:
351-368.
Whitkus, R. 1998.
Genetics of adaptive radiation in Hawaiian and Cook Islands species of Tetramolopium
(Asteraceae). II. Genetic linkage map and its implications for
interspecific breeding barriers. Genetics 150:
1209-1216. abstract PDF
Whitkus, R., M. De
la Cruz, L. Mota-Bravo, and A. Gómez-Pompa. 1998. Genetic
diversity and relationships of cacao (Theobroma cacao L.) in
southern Mexico. Theoretical and Applied Genetics 96:
621-627. abstract PDF
Brunell, M. S. and
R. Whitkus. 1997. RAPD marker variation in Eriastrum densifolium
(Polemoniaceae): Implications for subspecific delimitation and
conservation. Systematic Botany 22: 543-553.
Okada, M., R.
Whitkus, and T. K. Lowrey. 1997. Genetics of adaptive radiation in
Hawaiian and Cook Islands species of Tetramolopium (Asteraceae:
Astereae): I. Nuclear RFLP marker diversity. American Journal of
Botany 84: 1236-1246. abstract PDF
de la Cruz, M., L. Mota-Bravo, A. Gómez-Pompa, and R. Whitkus. 1996. Cacao: su domesticacíon. Investigacion y Ciencia (Spanish edition of Scientific American) 237: 38-39.
Ellstrand, N. C., R.
Whitkus, and L. H. Rieseberg. 1996. Distribution of spontaneous plant
hybrids. Proceeding of the National Academy of Sciences, USA
93:
5090-5093. abstract PDF
de la Cruz, M., R.
Whitkus, and L. Mota-Bravo. 1995. Tropical tree DNA isolation and
amplification. Molecular Ecology 4: 787-789.
de la Cruz, M., R. Whitkus, A. Gómez-Pompa, and L. Mota-Bravo. 1995. Origins of cacao cultivation. Nature 375: 542-543.
Pereira, M. G., M. Lee, P. Bramel-Cox, W. Woodman, J. Doebley, and R. Whitkus. 1994. Construction of an RFLP map in sorghum and comparative mapping in maize. Genome 37: 236-243.
Whitkus, R., J. Doebley, and J. F. Wendel. 1994. Nuclear DNA markers in systematics and evolution, p. 116-141. In Phillips, R. L. And I. K. Vasil (eds.), DNA-Based Markers in Plants. Kluwer Acad. Publ., The Netherlands.
Whitkus, R., J.
Doebley, and M. Lee. 1992. Comparative genome mapping of sorghum and
maize. Genetics 132: 1119-1130. abstract PDF
Whitkus, R. 1992. Allozyme variation within the Carex pachystachya complex (Cyperaceae). Systematic Botany 17: 16-24.
Whitkus, R. 1991. Chromosome counts of Carex section Ovales. Botanical Gazette 152: 224-230.
Les, D. H., R. Whitkus, F. A. Bryan, and L. E. Tyrrell. 1989. Biochemical basis of floral color polymorphism in a heterocyanic population of Trillium sessile (Liliaceae). American Journal of Botany 76: 23-29.
Crawford, D. J., B. J. Post, and R. Whitkus. 1988. Allozyme variation within and between populations of Coreopsis latifolia (Asteraceae). Plant Species Biology 3: 1-5.
Crawford, D. J. and R. Whitkus. 1988. Allozyme divergence and mode of speciation for Coreopsis gigantea and C. maritima (Compositae). Systematic Botany 13: 256-264.
Whitkus, R. 1988. Modified version of GENESTAT. A program for computing genetic statistics from allelic frequency data. Plant Genetics Newsletter 4: 10.
Whitkus, R. 1988. Experimental hybridizations among chromosome races of Carex pachystachya and the related species C. malcoviana and C. preslii (Cyperaceae). Systematic Botany 13: 156-153.
Whitkus, R., F. A. Bryan, D. H. Less, and L. E. Tyrrell. 1987. Genetic structure in a heterocyanic population of Trillium sessile (Liliaceae). Plant Species Biology 2: 67-73.
Wolf, S. J. and R. Whitkus. 1987. A numerical analysis of flavonoid variation in Arnica subgenus Austromontana (Asteraceae). American Journal of Botany 74: 1577-1584.
Crawford, D., J., R. Whitkus, and T. F. Stuessy. 1987. Plant evolution and speciation on oceanic islands, pp. 183-199. In Urbanska, K. M. (ed.), Differentiation Patterns in Higher Plants. Acad. Press, London.
Whitkus, R. 1985. A FORTRAN program for computing genetic statistics from allelic frequency data. Journal of Heredity 76: 152.
Whitkus, R. and J. G. Packer. 1984. A contribution to the taxonomy of the Carex macloviana D’Urv. aggregate (Cyperaceae) in western Canada and Alaska. Canadian Journal of Botany 62: 1592-1607.
Packer, J. G. And R. Whitkus. 1982. In Love, A. (ed.), IOPB chromosome Number Reports LLXV. Taxon 31: 363-364.
Whitkus, R. 1981. Chromosome numbers of some northern New Jersey carices. Rhodora 83: 461-464.