TY - JOUR
T1 - Fruit size QTLs affect in a major proportion the yield in tomato
AU - Hernández-Bautista, Aurelio
AU - Lobato-Ortiz, Ricardo
AU - Cruz-Izquierdo, Serafín
AU - García-Zavala, J. Jesús
AU - Chávez-Servia, José Luis
AU - Hernández-Leal, Enrique
AU - Bonilla-Barrientos, Olga
N1 - Publisher Copyright:
© 2015 Instituto de Investigaciones Agropecuarias, INIA. All rights reserved.
PY - 2015/12
Y1 - 2015/12
N2 - Yield is a complex trait that is affected by several genetic and environmental factors. Yield is defined as the amount of the part of interest that is harvested from a crop plant in a given area. We investigated the genetic basis of yield in an F2 population derived from a cross between Solanum lycopersicum L. and its most closely related wild species S. pimpinellifolium L. We found that average fruit weight, fruit diameter, and fruit length had a strong effect on yield. In addition, small effects on yield due to soluble solids content and locule number were also observed. A total of 25 different significant quantitative trait locus (QTLs) were detected for six traits (fruit length and diameter, fruit weight, yield, locule number, and Brix degrees). The percentage of phenotypic variation associated with single QTLs ranged from 4.19% to 12.67%. A strong co-location of QTLs among yield and fruit size traits was observed, suggesting that these QTLs play a role in the same expression process controlling yield. We also realized that the effects of soluble solids content on yield could be due to direct effects of fruit size QTLs linked to genes controlling soluble solids content. This result then may suggest that yield in tomato is mainly formed by fruit size QTLs, whereas the remaining factors may play a complementary role in the expression of tomato yield.
AB - Yield is a complex trait that is affected by several genetic and environmental factors. Yield is defined as the amount of the part of interest that is harvested from a crop plant in a given area. We investigated the genetic basis of yield in an F2 population derived from a cross between Solanum lycopersicum L. and its most closely related wild species S. pimpinellifolium L. We found that average fruit weight, fruit diameter, and fruit length had a strong effect on yield. In addition, small effects on yield due to soluble solids content and locule number were also observed. A total of 25 different significant quantitative trait locus (QTLs) were detected for six traits (fruit length and diameter, fruit weight, yield, locule number, and Brix degrees). The percentage of phenotypic variation associated with single QTLs ranged from 4.19% to 12.67%. A strong co-location of QTLs among yield and fruit size traits was observed, suggesting that these QTLs play a role in the same expression process controlling yield. We also realized that the effects of soluble solids content on yield could be due to direct effects of fruit size QTLs linked to genes controlling soluble solids content. This result then may suggest that yield in tomato is mainly formed by fruit size QTLs, whereas the remaining factors may play a complementary role in the expression of tomato yield.
KW - Fruit size
KW - Locule number
KW - QTL
KW - Solanum lycopersicum
KW - Soluble solids content
KW - Tomato
UR - http://www.scopus.com/inward/record.url?scp=84948757368&partnerID=8YFLogxK
U2 - 10.4067/S0718-58392015000500004
DO - 10.4067/S0718-58392015000500004
M3 - Artículo
SN - 0718-5820
VL - 75
SP - 402
JO - Chilean Journal of Agricultural Research
JF - Chilean Journal of Agricultural Research
IS - 4
ER -