Genetic divergence among wild and hybrid tomato accessions based on morphoagronomic and physiological traits

ABSTRACT The objective of this study was to evaluate the genetic divergence among accessions of wild tomato species and interspecific F1 hybrids. Six wild accessions were characterized (Solanum pimpinellifolium ‘AF 26970’, S. galapagense ‘LA-1401’, S. peruvianum ‘AF 19684’, S. habrochaites var. hirsutum ‘PI-127826’, S. habrochaites var. glabratum ‘PI-134417’, and S. pennellii ‘LA-716’), the commercial cultivar Redenção, and the respective interspecific F1 hybrids: ‘Redenção’ x ‘AF 26970’, ‘Redenção’ x ‘LA-1401’, ‘Redenção’ x ‘AF 19684’, ‘Redenção’ x ‘PI-127826’, ‘Redenção’ x ‘PI-134417’, and ‘Redenção’ x ‘LA-716’. Thirty-five quantitative traits were evaluated, encompassing 29 morphoagronomic and six physiological characteristics. Principal component analysis (PCA) was performed. Tocher’s optimization method was used based on the Mahalanobis distance and the graphic dispersion of canonical variables, which followed the same trend of genotype clustering, forming three distinct groups. The PCA indicated some genetic divergences not shown by the other methods. A high divergence was observed among the species accessions and interspecific hybrids. The cultivar Redenção had the greatest genetic dissimilarity, and the interspecific hybrids of S. lycopersicum with wild accessions showed the greatest morphoagronomic and physiological similarity with the wild parents.

Bibliographic Details

Main Authors:	Zeist,André Ricardo, Resende,Juliano Tadeu V de, Oliveira,Guilherme José A, Lima Filho,Renato B de, Henschel,Juliane M, Figueiredo,Alex Sandro T, Silva Júnior,André D, Faria,Marcos V
Format:	Digital revista
Language:	English
Published:	Associação Brasileira de Horticultura 2022
Online Access:	http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362022000300326
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