Journal of
Plant Breeding and Crop Science

  • Abbreviation: J. Plant Breed. Crop Sci.
  • Language: English
  • ISSN: 2006-9758
  • DOI: 10.5897/JPBCS
  • Start Year: 2009
  • Published Articles: 409

Full Length Research Paper

Tracking fruit size increase in recombinants obtained from an interspecific cross between cultivated tomato (Solanum esculentum) and wild tomato relative (S. pimpinellifolium)

Atugwu, Agatha Ifeoma1* and Uguru, Michael Ifeanyi2
  1Natural Science Unit, School of General Studies, University of Nigeria, Nsukka, Nigeria. 2Department of Crop Science, Faculty of Agriculture, University of Nigeria, Nsukka, Nigeria.

  •  Accepted: 20 February 2012
  •  Published: 29 February 2012

Abstract

 

The present study was conducted to track the progress in fruit size increment in inter-specific tomato hybrids from Fto F12 generation. Selection was imposed at every generation and the incremental rate in single fruit size from one generation to another was obtained using relative performance difference (RPD) between successive generations. Increase in fruit size was vivid at every generation and there were discernable evidence to show that the inheritance of fruit size was under polygenic control. The fruit size incremental rate was slow from F1 to F7. Thereafter, the increase became more rapid and attained a peak at the F9 generation. The fruit size increase from F10 to F12 generation was remarkably low with the relative performance difference not exceeding 22%. The correlation studies showed non -significant relationship between fruit size and fresh fruit yield at the early generations. The association between the two traits was positive and significant at the advanced generations. The implications of these on tomato improvement have been discussed.

 

Key words: Tomato, fruit size, interspecific cross, Solanum esculentum, Solanum pimpinellifolium