Quantitative trait locus mapping associated with earliness and fruit weight in tomato
ABSTRACT The flowering time is regarded as an important factor that affects yield in various crops. In order to understand how the molecular basis controlling main components of earliness in tomato (Solanum lycopersicum L.), and to deduce whether the correlation between fruit weight, days to flowering and seed weight, is caused by pleiotropic effects or genetic linkage, a QTLs analysis was carried out using an F2 interspecific population derived from the cross of S. lycopersicum and S. pimpinellifolium. The analysis revealed that most of the components related to earliness were independent due to the absence of phenotypic correlation and lack of co-localization of their QTLs. QTLs affecting the flowering time showed considerable variation over time in values of explained phenotypic variation and average effects, which suggested dominance becomes more evident over time. The path analysis showed that traits such as days to flowering, seed weight, and length of the first leaf had a significant effect on the expression of fruit weight, confirming that their correlations were due to linkage. This result was also confirmed in two genomic regions located on chromosomes 1 and 4, where despite showing high co-localization of QTLs associated to days to flowering, seed weight and fruit weight, the presence and absence of epistasis in dfft1.1 × dftt4.1 and fw1.1 × fw4.1, suggested that the linkage was the main cause of the co-localization.
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Escola Superior de Agricultura "Luiz de Queiroz"
2016
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oai:scielo:S0103-901620160005004782016-08-16Quantitative trait locus mapping associated with earliness and fruit weight in tomatoHernández-Bautista,AurelioLobato-Ortiz,RicardoGarcía-Zavala,José JesúsLópez-Fortoso,FernandoCruz-Izquierdo,SerafínChávez-Servia,José LuisCadeza-Espinosa,Marisol Solanum lycopersicum QTLs epistasis days to flowering path analysis ABSTRACT The flowering time is regarded as an important factor that affects yield in various crops. In order to understand how the molecular basis controlling main components of earliness in tomato (Solanum lycopersicum L.), and to deduce whether the correlation between fruit weight, days to flowering and seed weight, is caused by pleiotropic effects or genetic linkage, a QTLs analysis was carried out using an F2 interspecific population derived from the cross of S. lycopersicum and S. pimpinellifolium. The analysis revealed that most of the components related to earliness were independent due to the absence of phenotypic correlation and lack of co-localization of their QTLs. QTLs affecting the flowering time showed considerable variation over time in values of explained phenotypic variation and average effects, which suggested dominance becomes more evident over time. The path analysis showed that traits such as days to flowering, seed weight, and length of the first leaf had a significant effect on the expression of fruit weight, confirming that their correlations were due to linkage. This result was also confirmed in two genomic regions located on chromosomes 1 and 4, where despite showing high co-localization of QTLs associated to days to flowering, seed weight and fruit weight, the presence and absence of epistasis in dfft1.1 × dftt4.1 and fw1.1 × fw4.1, suggested that the linkage was the main cause of the co-localization.info:eu-repo/semantics/openAccessEscola Superior de Agricultura "Luiz de Queiroz"Scientia Agricola v.73 n.5 20162016-10-01info:eu-repo/semantics/articletext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162016000500478en10.1590/0103-9016-2015-0245 |
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Hernández-Bautista,Aurelio Lobato-Ortiz,Ricardo García-Zavala,José Jesús López-Fortoso,Fernando Cruz-Izquierdo,Serafín Chávez-Servia,José Luis Cadeza-Espinosa,Marisol |
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Hernández-Bautista,Aurelio Lobato-Ortiz,Ricardo García-Zavala,José Jesús López-Fortoso,Fernando Cruz-Izquierdo,Serafín Chávez-Servia,José Luis Cadeza-Espinosa,Marisol Quantitative trait locus mapping associated with earliness and fruit weight in tomato |
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Hernández-Bautista,Aurelio Lobato-Ortiz,Ricardo García-Zavala,José Jesús López-Fortoso,Fernando Cruz-Izquierdo,Serafín Chávez-Servia,José Luis Cadeza-Espinosa,Marisol |
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Hernández-Bautista,Aurelio |
title |
Quantitative trait locus mapping associated with earliness and fruit weight in tomato |
title_short |
Quantitative trait locus mapping associated with earliness and fruit weight in tomato |
title_full |
Quantitative trait locus mapping associated with earliness and fruit weight in tomato |
title_fullStr |
Quantitative trait locus mapping associated with earliness and fruit weight in tomato |
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Quantitative trait locus mapping associated with earliness and fruit weight in tomato |
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quantitative trait locus mapping associated with earliness and fruit weight in tomato |
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ABSTRACT The flowering time is regarded as an important factor that affects yield in various crops. In order to understand how the molecular basis controlling main components of earliness in tomato (Solanum lycopersicum L.), and to deduce whether the correlation between fruit weight, days to flowering and seed weight, is caused by pleiotropic effects or genetic linkage, a QTLs analysis was carried out using an F2 interspecific population derived from the cross of S. lycopersicum and S. pimpinellifolium. The analysis revealed that most of the components related to earliness were independent due to the absence of phenotypic correlation and lack of co-localization of their QTLs. QTLs affecting the flowering time showed considerable variation over time in values of explained phenotypic variation and average effects, which suggested dominance becomes more evident over time. The path analysis showed that traits such as days to flowering, seed weight, and length of the first leaf had a significant effect on the expression of fruit weight, confirming that their correlations were due to linkage. This result was also confirmed in two genomic regions located on chromosomes 1 and 4, where despite showing high co-localization of QTLs associated to days to flowering, seed weight and fruit weight, the presence and absence of epistasis in dfft1.1 × dftt4.1 and fw1.1 × fw4.1, suggested that the linkage was the main cause of the co-localization. |
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Escola Superior de Agricultura "Luiz de Queiroz" |
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2016 |
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http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162016000500478 |
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