INVESTIGADORES
RODRIGUEZ Gustavo Ruben
congresos y reuniones científicas
Título:
Effect of SUN and OVATE on tomato fruit morphology in different genetic backgrounds
Autor/es:
RODRÍGUEZ, GUSTAVO RUBÉN; ANDERSON, CLAIRE; ZHANG, NA; MOYSEENKO, JENNYFER B; GONZALO, MARIA JOSE; VAN DER KNAAP, ESTHER
Lugar:
Merida, Mexico
Reunión:
Congreso; Plant Biology 2008; 2008
Institución organizadora:
American Society of Plant Biologist
Resumen:
The two most important genes contributing to an elongated fruit shape in tomato (S. lycopersicum) have been identified as SUN and OVATE. Located on Chr 7, SUN affects shape after fertilization (1) whereas OVATE, Chr 2, affects shape before fertilization (2). The objective of this work was to analyze the effect of SUN and OVATE on fruit morphology in both wild and cultivated backgrounds and to determine whether these genes interact. Seven fruit shape attributes were evaluated by Tomato Analyzer Software (3): fruit shape index, obovoid, width widest position and distal end protrusion as well as internal fruit eccentric attributes such as distal and proximal end eccentricity and pericarp elongation index. The effect in the wild background was evaluated in NILs of LA1589 (S. pimpinellifolium) and in the cultivated tomato background in an intraspecific cross between cvs. Yellow Stuffer and Long John. The strongest effect of SUN on fruit morphology is to increase the oval shape of the seed part of the fruit whereas the largest effect of OVATE is on the eccentric positioning of the seed in the fruit. Although fruit shape index is also controlled by OVATE the effect is small in the wild background. Also, it was determined that SUN and OVATE act independently in the control of tomato fruit shape. Finally, we evaluated a wide set of varieties (i.e. Heirloom, Spanish, Italian and Latin American lines as well as wild species) that were genotyped for these genes. Varieties carrying SUN show long pepper or ox-heart fruit shape whereas varieties carrying OVATE are pear-shape, heart or elliptic. References: 1) Xiao et al. (2008) Science 319:1527-1530. 2) Liu et al. (2002) PNAS 99: 13302-13306. 3.) Brewer et al. (2006) Plant Physiol. 141:15-25. Funded by NSF DBI 0227541