Alcobaça allele and genotypic backgrounds affect yield and fruit shelf life of tomato hybrids

Scientia Agricola

Túlio José Mendes Dias²  Wilson Roberto Maluf²  Marcos Ventura Faria¹  Joelson André De Freitas¹  Luiz Antonio Augusto Gomes¹  Juliano Tadeu Vilela Resende²  Sebastião Márcio De Azevedo¹ 

[1] ,Universidade Federal de Lavras Depto. de Agricultura Lavras MG ,Brasil

关键词: Lycopersicon esculentum;    alcobaça;    ripening mutant;    long shelf-life;    Lycopersicon esculentum;    alcobaça;    mutante de amadurecimento;    tomate longa-vida;   

DOI  :  10.1590/S0103-90162003000200010

来源: SciELO

【 摘 要 】

Post-harvest shelf life of tomato fruit may be increased by deploying mutant alleles which affect the natural ripening process and/or by a favorable genotypic background. Among the several ripening mutant genes, alcobaça (alc) has proved to be highly efficient in increasing shelf life of commercial tomato fruits, especially in heterozygosis, a state at which no limiting deleterious effects upon fruit color occur. The effects of heterozygosity in the alcobaça locus (alc+/alc) on yield and fruit quality traits of tomato hybrids with three genotypic backgrounds. We evaluated three pairs of hybrids obtained from crosses between the near-isogenic pollen source lines Flora-Dade (alc+/alc+) and TOM-559 (alc/alc), and three maternal lines (Stevens, NC-8276 and Piedmont). The six treatments were factorial combinations of two different status in the alc locus (alc+/alc and alc+/alc+) versus three different genotypic backgrounds (maternal lines). Fruits were harvested at the breaker stage of maturation and stored in shelves at 21ºC for 14 days. Yield and fruit quality traits were then evaluated. Regardless of the background, the alc allele in heterozygosis (alc+/alc) did not interfere with the total yield, commercial yield, average mass per fruit, average mass per commercial fruit, fruit shape, or with fruit peduncular scar diameter. The alc+/alc genotype reduced the rate of firmness loss and delayed evolution of the red color of the fruit, thus contributing to an increase of the post-harvest shelf life for all three genotypic backgrounds.

【 授权许可】

CC BY   
 All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License