Screening of tomato hybrids for resistance to Fusarium wilt

Abstract

Few commercial genotypes of tomato are resistant to Fusarium wilt (Fusarium oxysporum f. sp. lycopersici [FOL]), especially to race 3. We developed five intraspecific hybrids of Solanum lycopersicum (FOX1 to FOX5) and assessed them for agronomic traits and resistance to FOL races 1, 2, 3, and a mixture of these races. FOX1 and FOX4 were resistant to all races and the race mixture but did not have the desired agronomic traits. Next, FOX1 and FOX4 were assessed as rootstocks of the cherry tomato Sweet Heaven. The grafting of Sweet Heaven on FOX4 did not reduce growth, gas exchange, yield, or fruit quality. When FOX1 was used as a rootstock, the fruits exhibited a reduction in firmness, fruit pulp pH, and total soluble solids by 14.3%, 1.2%, and 6.75%, respectively. Thus, the hybrid FOX4 can be used as a rootstock for Sweet Heaven to manage Fusarium wilt.

In-vivo Screening of Cherry Tomato [Solanum lycopersicum L. var. cerasiforme (Dunnal) A. Gray] Genotypes and Hybrids against Fusarium Wilt in Arunachal Pradesh, India

“…It was reported by Alexandrov [18]. Variations of the degree of resistance for Fusarium oxysporum by different varieties, cultivars and lines were reported by Fernandes et al [11], Sanap et al [10], Serife et al [19]; Onyekachukwu et al [20] and others in terms of % of plant infected by the pathogen with different ranges and the responses of the plants with respect to combination of genetic environmental factors.…”

“…Previous researchers have studied about the morphological and biochemical natures of Fusarium oxysporum f.sp. lycopersici [6,7], about various screening techniques [8,9] and categorized some genotypes, cultivars and hybrids of tomato as resistant, susceptible and tolerant according to their various responses towards the pathogen [10,11,12]. A sensible solution to these issues is to hunt for resistant sources from regionally accessible, novel tomato genotypes with appropriate breeding techniques for introducing those genes in the commercial cultivars.…”

Genetics of qualitative and quantitative traits in crosses involving cherry and purple tomato genotypes

“…cerasiforme (Dunnal) A. Grey] are actually a hybrid between wild currant-type tomatoes and domesticated garden tomatoes, not "ancestral" to cultivated tomatoes (Nesbitt and Tanksley 2002). Recently, cherry tomatoes are becoming popular in Brazil and other parts of the world, in a protected environment, due to their high concentration of phytochemicals and antioxidants, such as lycopene, β-carotene, flavonoids, vitamin C, and many other vital nutrients, as well as their delicious flavour and ability to set fruit even at high temperatures (Rosales et al 2011;Fernandes et al 2022). Field-produced cherry tomatoes have a higher flavour rating than those produced under greenhouse conditions (Singh et al 2021).…”