**Author details**

and it was found that Nkansah, King 5, 181 (CLN 2318 F) and DV 2962 cultivars were better

'Nkansah' Forest and Horticulture Crops Research Centre, Kade, University of Ghana

The outcome of these various screening programmes can be utilized in a hybridization programme by crossing genotypes expressing mild symptoms to the TYLCV and nematodes as well as genotypes that are tolerant to heat with locally adapted accessions that are susceptible

Tomato varieties currently grown in Ghana are generally acidic, watery, poor in color, poor shelf life and susceptible to TYLCV as well as intolerant to heat. Future tomato-breeding programmes should focus in the short-term on introgression of Tomato Yellow Leaf Curl Disease Resistant genes into locally adapted varieties and improving the shelf life of these locally adapted tomato varieties. These will address the major constraints facing the tomato industry in Ghana. Longterm tomato-breeding objectives should encompass the improvement of fruit color, increasing brix, improving rainy season varieties with good fruit-quality traits, increasing variability through

adapted to heat stress [55].

**Tomato cultivar Origin**

64 Recent Advances in Tomato Breeding and Production

King 5′ Japan Queen' Japan '18I (CLN 2318 F)' AVDRC 14IR Island Red' Samoa Island '8S Selected SM1' Samoa Island '5C Roma' Samoa Island '17I (CLN 2443B)' AVDRC

'Petomech' Monarch Seed, Holland

F1 Ninja' Technisem, France 'Tropimech' Technisem, France

'Rio Grande VF' Griffaton Producteur Grainier, France Tomato Rockstone VF' Griffaton Producteur Grainier, France 'Caracoli' Griffaton Producteur Grainier, France

'Petomech VF II Improved Petoseed Seminis, Netherlands 'Moneymaker' Griffaton Producteur Grainier, France

to these stresses to develop resilient varieties.

'DV-2962' Seminis Monsanto, Thailand

'Champion' Crop Science Department, University of Ghana Wosowoso' Crop Science Department, University of Ghana

**3.7. Potential tomato breeding objectives**

**Table 10.** Tomato cultivars used for the heat stress.

Leander D. Melomey1,2\*, Agyemang Danquah1,2, Samuel K. Offei1,3, Kwadwo Ofori1,2, Eric Danquah1,3 and Michael Osei1,4

\*Address all correspondence to: lmelomey@wacci.edu.gh

1 West Africa Centre for Crop Improvement, College of Basic and Applied Science, University of Ghana, Legon, Ghana

2 Department of Crop Science, College of Basic and Applied Science, University of Ghana, Legon, Ghana

3 Biotechnology Centre, College of Basic and Applied Science, University of Ghana, Legon, Ghana

4 CSIR-Crops Research Institute, Kumasi, Ghana
