Biographical Memoirs Volume 84 (2004) / Chapter Skim
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Pages 307-320
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From page 307... ...
Using this comprehensive approach he developed the biology not only of cultivated tomato but also the entire tomato genus, Lycopersicon. He was a naturalist and adventurer, once aptly described as Charles Darwin and Indiana Jones rolled into one.
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308 B I O G R A P H I C A L M E M O I R S pers on topics ranging from the evolution of mating systems to deletion mapping in tomato and a host of scientific protégés (offspring) , including the two authors of this tribute, who were influenced by his evolutionary approach to plant genetics and infused with his enthusiasm for biological inquiry and the wonders of the natural world.
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. In 1948 Rick began a series of expeditions to South America to seek out the wild relatives of the cultivated tomato.
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Working with these materials, Rick and colleagues were able to establish the systematic relationships of thousands of wild tomato populations and to group them into species clusters and geographical and compatibility races. CYTOGENETICS TOUR DE FORCE From the 1950s through the 1970s Rick was heavily involved with cytogenetic studies of the tomato genome.
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C H A R L E S M A D E R A R I C K 311 It was in hopes of solving the chromosome 11 and 12 mystery that Rick invited one of us (G.S.K.) to join his group in the early 1960s for a six-month postdoctoral study.
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Upon return from his first collecting expedition to South America, Rick embarked on a series of studies aimed at unraveling the systematics of wild tomato species, mapping out the distribution of genetic variation, and determining the biological and geographic factors responsible for these attributes. Rick was both comprehensive and multi-pronged in his approach, using geographic, morphological, cytogenetic, sexual cross-compatibility, and in latter years molecular data to draw inferences.
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Rick was also one of the first people to recognize the potential of molecular breeding. During one of the systematic studies of genetic variation in cultivated tomato accessions Rick discovered highly significant linkage disequilibrium between a rare isozyme allele and resistance to nematodes.
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As early as 1953 Rick showed that crosses between wild species and their cultivated relatives could reveal novel genetic variation of potential use in agriculture. He promoted the use of geographic and environmental factors as predictors of which wild accessions might contain useful traits.
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C H A R L E S M A D E R A R I C K 315 ated. These "introgression lines" could then be used to study the effects of defined segments of wild-species DNA in otherwise isogenic backgrounds.
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316 B I O G R A P H I C A L M E M O I R S mor in almost every passing moment in life. He was an icon on the UC Davis campus, easily identified by his trademark khaki fishing hat that seldom left his head regardless of whether he was pollinating tomatoes or addressing a group of dignitaries.
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1965 Modified recombination in a tomato species hybrid. Genetics 52:468 69.
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Evolution of mating systems in Lycopersicon hirsutum as deduced from genetic variation in elec trophoretic and morphological characters. Plant Syst.
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Science 313:453-55. 1982 Genetic relationships between self-incompatibility and floral traits in the tomato species.
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Institute Fermi the of Courtesy
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