Parent Offspring Relations of Nutritional Quality Traits in 8 X 8 Partial Diallel Cross of Fresh Tomatoes.

Combining abilities for nutritional quality content were examined in tomato to understand the inheritance pattern of total soluble solids, titrable acidity, carbohydrates, proteins, carotenoids, ascorbic acid, potassium, lycopene and fruit yield plant-1. This experiment comprising a total of 64 treatments (28 F1+28 F2+ 8 parents) was evaluated in RBD. The results indicated that most of the traits were governed by additive gene action however non additive gene actionwas also important. The parent Pusa Ruby was found to be good general combiners for yield and nutritional traits and hence could be utilized in multiple breeding programs in future. The cross Pusa Ruby x Arka Vikas was desirable for fruit yield as well as nutritional characters since it inherited all nutritional traits except TSS content in F1generation and carotene content in F2 generation in desired direction.

Studies on Hybrid Vigour in F1 And ots Retention in F2 for Fruit Firmness and Related Traits in Tomato.

Tomato varieties having less number of locules, thicker pericarp and good firmness are preferred by the consumers. A set of 28 half diallel crosses were generated by crossing 8 inbred lines of tomato (Lycopersicon esculentum Mill) namely Gujarat Tomato 1 (GT 1), Pusa Ruby, H 24, Ec 490190, Arka Vikas, Ec 163599, Ec 177371 and Ec 398704. Parents, F1 hybrids and F2 populations using randomized complete block design with three replications were evaluated for fruit weight, equatorial and polar diameter, number of locules, pericarp thickness and firmness at Junagadh Agricultural University, Junagadh (Gujarat, India). Significant genetic differences were observed among the parents, their F1 hybrids and F2 populations for fruit firmness related characters except locules fruit-1 under study. The cross Arka Vikas x Ec 398704 followed by GT 1 X Ec 490190 and Pusa Ruby X Ec 163599 exhibited higher heterobeltiosis as well as standard heterosis along with considerable inbreeding depression for fresh fruit firmness hence, is desired for firm fruited tomato plants and would score over yield when tomato are cultivated for distant markets. This cross also involved at least one parent having grater firmness as well pericarp thickness and few locules, hence, can be recommended for breeding improved fruit firmness lines in future.