title: The control of tomato fruit elongation orchestrated by sun, ovate and fs8.1 in a wild relative of tomato.
abstract: Within the cultivated tomato germplasm, sun, ovate and fs8.1 are the three predominant QTLs controlling fruit elongation. Although SUN and OVATE have been cloned, their role in plant growth and development are not well understood. To compare and contrast the effects of the three QTLs in a homogeneous background, we developed near isogenic lines (NILs) in the wild species Solanum pimpinellifolium LA1589 background. We carried out detailed morphological characterization of reproductive and vegetative organs in the single, double and triple NILs and determined the epistatic interactions of the three loci affecting fruit shape. The phenotypic evaluations demonstrated that the three loci regulate unique aspects of ovary and fruit elongation and in different temporal manners. The strongest effect on organ shape was caused by sun. In addition to fruit shape, sun also affected leaf and sepal elongation and stem thickness. The synergistic interaction between sun and ovate or fs8.1 suggested that the pathways involving SUN, OVATE and the gene(s) underlying fs8.1 may converge at a common node. The results of an extensive profiling analysis suggested that the degree of fruit elongation was not related to the accumulation of any of the classical hormones.
authors.affiliation: Department of Horticulture and Crop Science, The Ohio State University, Wooster, OH 44691, USA.
authors.forename: Shan
authors.initials: S
authors.lastname: Wu
authors.affiliation: Department of Horticulture and Crop Science, The Ohio State University, Wooster, OH 44691, USA.
authors.forename: Josh P
authors.initials: JP
authors.lastname: Clevenger
authors.affiliation: Department of Horticulture and Crop Science, The Ohio State University, Wooster, OH 44691, USA.
authors.forename: Liang
authors.initials: L
authors.lastname: Sun
authors.affiliation: Department of Mathematics and Computer Science, The College of Wooster, Wooster, OH 44691, USA.
authors.forename: Sofia
authors.initials: S
authors.lastname: Visa
authors.affiliation: RIKEN Center for Sustainable Resource Science, 1-7-22, Suehiro-cho, Tsurumi-ku, Yokohama 230-0045, Japan.
authors.forename: Yuji
authors.initials: Y
authors.lastname: Kamiya
authors.affiliation: RIKEN Center for Sustainable Resource Science, 1-7-22, Suehiro-cho, Tsurumi-ku, Yokohama 230-0045, Japan.
authors.forename: Yusuke
authors.initials: Y
authors.lastname: Jikumaru
authors.affiliation: Department of Horticulture and Crop Science, The Ohio State University, Wooster, OH 44691, USA.
authors.forename: Joshua
authors.initials: J
authors.lastname: Blakeslee
authors.affiliation: Department of Horticulture and Crop Science, The Ohio State University, Wooster, OH 44691, USA. Electronic address: vanderknaap.1@osu.edu.
authors.forename: Esther
authors.initials: E
authors.lastname: van der Knaap
mesh_terms: D001499:Bayes Theorem; D016000:Cluster Analysis; D004843:Epistasis, Genetic; D035264:Flowers / Q000254:growth & development / Q000378:metabolism; D005638:Fruit / Q000033:anatomy & histology / Q000235:genetics* / Q000254:growth & development*; D006720:Homozygote; D007178:Inbreeding; D038081:Organogenesis; D010937:Plant Growth Regulators / Q000378:metabolism; D018515:Plant Leaves / Q000033:anatomy & histology; D010940:Plant Proteins / Q000235:genetics* / Q000378:metabolism; D040641:Quantitative Trait Loci / Q000235:genetics*; D012098:Reproduction; D032322:Solanum / Q000235:genetics* / Q000254:growth & development*
chemical_list: D010937:Plant Growth Regulators; D010940:Plant Proteins
keywords: Fruit shape; Near isogenic lines; OVATE; SUN; Tomato; fs8.1