Development and comparative studies of double cross tomato hybrids (original) (raw)
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Half diallel of F1 tomato hybrid and its double cross-compatibility
Biodiversitas Journal of Biological Diversity
Breeding program for improvement of tomato fruit can be done through diallelic crosses genetic combinations. Therefore, genetic evaluation is needed to meet the breeding objective. This process can be combined with crosses between F1 to produce high diversity. However, evaluating the crosses' compatibility is required to increase the effectiveness of the assembly process. This study aimed to assess the half-diallel crosses of F1 tomatoes in the field and determine the most compatible pair cross combinations in forming double and three-way F1 populations. This study was carried out in the Experimental Farm of the Faculty of Agriculture, Hasanuddin University. The field evaluation was arranged in a randomized complete block design with ten genotypes, while the compatibility evaluation was carried out using 6 F1 half diallel as the parents. The results showed that the Mawar and Chung varieties were better parents in the crossings. Furthermore, the results showed that F1 K/M (the best yield component), M/C (the best TDS and Lycopene traits), and BC/K (the genotype has good traits of yield component, TDS and Lycopene) were the best single F1 crosses that could be inherited to the F2 generation. In contrast, F1 K/M and F1
COMPERATIVE PERFORMANCE OF SELECTED TOMATO HYBRIDS AND THEIR PARENTS.pdf
An investigation was carried out at the Research Farm of Olericulture Division under Horticulture Research Centre of Bangladesh Agricultural Research Institute (BARI) for evaluation of performance in Frs generation and parents in tomato during the winter season of 200748. The hybrids and parents showed iignificant variation in their performance. Fruit weigh! fruit length and fruit diameter varied fuom 61,.62 to 163.39 6.08 to 4'33cm and 7.30 to 4.35 cm respectively. Plant height, fruits per plant varied from 83.27 to 217.2cm,10.73 to 51.07 respectively. Fruit yield per plant varied from 0.64 to 313 kg and the cross combination pr x ps performed best Considering all characteristics the cross combinations p1 x p6, pzxpz, p5 x p6 and the parent Prz performed best.
Characterization of Determinate Tomato Hybrids: Search for Better Processing Qualities
Research Article, 2013
Thirty-one determinate tomato hybrids developed by both public and private sectors in India over the years were characterized in order to select the most appropriate hybrids for processing purpose. The performance of each hybrid was evaluated using certain physical and chemical indices. Most quality indices showed significant differences between hybrids, although their values remained in the typical ranges for processing tomatoes. In our study, two pear shaped private bred hybrids (BSS-423; TH-1359) qualified all the physico-chemical characteristics required for processing. However, three round shaped public (BCTH-62 and BCTH-4) and private (Vijay Lakshmi) bred hybrids also showed great promise for requisite qualification. The promising hybrids also showed high yield potential (> 60.0 t/ha) which is the general acceptance criteria among the farmers. The correlation study indicates some significant positive relationship between polar diameter and pericarp thickness, equatorial diameter and locule number, titratable acidity and vitamin C content, and lycopene and total carotenoids content of the fruit. The data generated in this study is of equal significance for the growers as well as for the tomato processors in the long run.
Performance of single, double and three-way cross hybrids in tomato (Lycopersicon esculentum Mill
The choice of tomato hybrids becomes ever more important for increase of yield and quality. The major objective of the research was focused to evaluate the yield performance and heterosis of tomato hybrids. In this regard, ten single, five three-way and seven double cross hybrids of tomato were evaluated for ten different yield contributing characters with a check variety. The experiment was conducted using randomized complete block design with three replications at the experimental field of Hajee Mohammad Danesh Science and Technology University, Dinajpur, Bangladesh, from November, 2013 to April, 2014. The three categories of hybrids revealed significant differences among the genotypes and exhibited high variation for the majority of characters studied. The single cross hybrids depicted stronger performance for days to 50% flowering (18.33 days after transplanting), number of fruits/plant (133.8) and yield/plant (4.03 kg). As expected, three-way cross hybrids were most uniform followed by double cross hybrids. Among the crosses, the highest significant positive heterobeltosis for number of fruits/plant and yield/plant were revealed in single cross hybrids. The highest significant positive heterobeltosis was found in double cross hybrid for shelf life. For days to 50% flowering, significant negative heterobeltosis indicating early flowering was recorded for most of the crosses except one single cross hybrid. The hybrid C 14 produced from single cross exhibited the highest performance for yield contributing characters compared to three-way, double cross hybrids and the check variety. This hybrid can be used in future for the development of tomato hybrid varieties though hybrid breeding program.
Journal of Horticultural Sciences, 2015
The present study was carried out to estimate the performance of F 1 hybrids and their parents for various yield and yield-attributing traits in cherry tomato, at Division of Vegetable Crops, Indian Institute of Horticultural Research (IIHR), Bengaluru, during the year 2010-11. Among the seven parents used, three parents, namely, IIHR-2866 (yielding 3.03kg/plant), IIHR-2864 (2.87kg/plant) and IIHR-2865 (2.73kg/plant) were found to be high-yielding. Among the 21 F1 hybrids evaluated, three hybrids, namely, IIHR-2754 x IIHR-2860 (4.27kg/plant), followed by IIHR- 2754 x IIHR-2865 (3.97kg/plant) and IIHR-2864 x IIHR-2865 (3.40kg/plant) recorded higher yield than the Check varieties, whereas, three hybrids, viz, IIHR-2754 x IIHR-2865 (54.38t/ha), succeeded by IIHR-2863 x IIHR-2866 (46.46t/ha) and IIHR-2858 x IIHR-2866 (44.79t/ha), recorded higher estimated yield per hectare than the Check varieties. Hybrid IIHR-2754 x IIHR-2860 was found promising for most of the traits studied. The best...
Evaluation of Tomato Hybrids in Salem District of Tamil Nadu
Journal of Krishi Vigyan, 2021
Tomato is cultivated in an area of 3177 ha in Salem district of Tamil Nadu. The major villages cultivating tomato are Panamarathupatti, Kammalapatti, Thumbalpatti, Mallur and Nalikkalpatti. Most of the farmers are cultivating private tomato hybrids with lesser productivity and more yield loss (up to 30 %) due to diseases like leaf curl, early and late blight and bacterial wilt. Hence, it was proposed to conduct an on farm trial to assess the per se performance of tomato hybrids with high yield and multiple disease resistance like TNAU Tomato Hybrid CO4 and Arka Vishesh. A field experiment was conducted at five different locations of Panamarathupatti block of Salem district during Kharif 2019 using hybrids IIHR hybrid Arka Vishesh and TNAU Tomato Hybrid CO 4 with Sivam hybrid as control. TNAU Tomato Hybrid CO 4 recorded an average yield of 95 t/ha and Arka Vishesh around 87 t/ha. The private hybrid Sivam recorded a yield of only 62 t/ha. TNAU Tomato Hybrid CO 4 recorded more average number of fruits per cluster (5.5) and higher fruit yield per plant (2.5 kg) as compared to Arka Vishesh with average number of fruits per cluster (4.5) and higher fruit yield per plant (2.25 kg). The seed cost of the private variety grown by the farmer was higher and the hybrids such as TNAU CO4 and IIHR hybrid Arka Vishesh performed better with regard to higher cost benefit ratio (BCR for TNAU Tomato Hybrid CO 4 is 1:3.81 and for Arka Vishesh 1:3.41).The market preference for TNAU Tomato Hybrid CO 4 was comparatively higher due to the large sized fruits with more acidity (0.7%) which enhances the consumer preference in the market.
Combining ability of tomato lines in saladette-type hybrids
Bragantia, 2014
Given the growing importance of the saladette fresh tomato market in Brazil, the objective of this paper was to assess the combining abilities of lines potentially useful as parents of hybridsin this class. The experiment consisted of28 genotypes, 18 hybrids from a partial diallel crossobtained from crossing two groups of tomato lines (Group I, with 9 parents, and Group II, with 2 parents), 8 F1 experimental hybrids, and 2 commercial checks. Traits evaluated were total yield, mean fruit mass, fruit shelf life, shape and percentsoluble solids. Additive genetic effects were generally more important than non-additive effects for all traits evaluated. The TOM-542 and TOM-734 lines, from group I, and the TOM-720 line, from group II, presented high general combining ability (GCA) estimates for most of the traits of importance for saladette tomatoes, and were therefore considered suitable parents of hybrids of this class. Higher fruit shelf life of TOM-723 as a parental line compared with ...
Acta Alimentaria, 2021
Tomato is worldwide the most grown vegetable. The primary target of breeding programs is to develop new tomato cultivars that are resistant to pests and diseases, in combination with high quality and yield, well-adaptation and good firmness. Among the different tomato types, cherry and cocktail tomatoes are widely preferred by consumers due to their better taste and appearance. In this study, two female tester lines were crossed with four male lines to obtain new tomato hybrids. The eight F1 hybrids and two commercial hybrids were planted in a randomised complete block design with two replications in a greenhouse in Antalya. The tomatoes of the hybrids and lines were harvested at fully ripened stage to evaluate yield, total soluble solids (TSS), fruit firmness, lycopene content and fruit colour parameters. TSS values of the cultivars and lines ranged from 4.5 to 9.5 °Bx, fruit firmness from 7.94 to 11.85 kg cm−2, lycopene from 52.10 to 55.88 mg kg−1, yield from 554.3 to 1336.7 g/pla...
Horticultura Brasileira, 2015
Brazil is the world eighth largest tomato producer and, within the country, the tomato production chain is segmented according to fruit destination: fresh consumption and processing (industrial supply). In contrast, Mozambique does not have a differentiated chain and cultivars are expected to serve both purposes. As there are no tomato breeding programs in Mozambique, cultivars used in the country come from other regions of the world, including Brazil. This paper describes the development and assessment of tomato hybrids with dual-purpose: fresh use and processing. Five tomato genotypes (B13LD, Castone, Massag-72, "Viradoro", and "Rio Grande") were crossed in complete diallel design without reciprocal, and the general and specific combining ability (GCA and SCA) and heterosis were estimated to ten agronomic and fruit quality traits. The offspring of cross B13LD x "Rio Grande" showed potential for use in dual purpose, considering SCA and heterosis estimates for fruit firmness (FF), total content of soluble solids (TSS), number of fruits per plant (NFP) and yield (YLD). Combinations B13LD x Castone, Massag-72 x "Viradoro", and Massag-72 x "Rio Grande", although having no strength to increase YLD, had positive heterosis for FF, TSS, and NFP. The development of high-yielding genotypes, with agronomic traits that meet the expectations of both markets are a breakthrough for Mozambican tomato producers and may also be very convenient to family farmers in Brazil. In both countries, these dual-purpose cultivars represent the freedom of choice to farmers, who will be then in position to allocate their production to the most profitable market segment.