Heritability and genetic diversity of agronomic traits, yield and fruit quality of 650 F6 generation lines in tomato

Articles in Press

Document Type : Full Paper

Authors

1 Department of Agronomy and Plant Breeding, College of Abouraihan, University of Tehran, Tehran, Iran

2 Department of Horticulture, College of Aburaihan, University of Tehran, Tehran, Iran

3 Department of Agronomy and Plant breeding Sciences, Aburaihan Campus, University of Tehran

Abstract

This study aimed to evaluate the yield and its components as well as fruit quality traits of 650 tomato inbred lines resulting from self-fertilization of commercial cultivars. The lines were evaluated along with four commercial hybrid control cultivars in 2022 as augmented in a randomized complete block design. The coefficients of phenotypic variation and the maximum and minimum values of the studied traits showed that there was a high variation for the traits of Sunscald (%), joint calyx (%), shelf life, TA, the number of fruits per plant, single-plant yield and the number of locules among the lines, so it is possible to select the best lines with high efficiency among them for breeding purposes. Among the lines, “242”, “495”, “17” and “85” were superior to other lines and control cultivars with a yield of over 6 kg per plant. Sunscald (%), joint calyx (%) and the number of locules were least influenced by the environment and had the highest genetic variance. Also, principal component analysis based on morphological traits showed that the first six main components explained 69.32% of the total phenotypic variation. Stepwise regression analysis showed that number of fruit per plant and single fruit weight explained 96% of the single-plant yield variation. Overall, among the morphological characteristics, the traits of the number of fruits per plant, single fruit weight, number of inflorescences per plant, and number of fruits per inflorescence are more important indicators for selecting high-yielding tomato lines.

Keywords

Iranian Journal of Horticultural Science

Articles in Press, Accepted Manuscript
Available Online from 22 July 2024

Files

History

  • Receive Date: 08 April 2024
  • Revise Date: 17 July 2024
  • Accept Date: 22 July 2024

Share

How to cite

Statistics