In Mexico, the predominant commercial Solanum lycopersicum L. varieties are red. Nevertheless, materials with alternative pigmentations can serve as a source of genetic variation for the expression of diverse fruit colors while providing nutraceutical properties of interest. The aim of this study was to determine the agronomic performance of hybrids derived from nine contrasting parents with different fruit shapes, colors, and indeterminate growth habits, as well as their direct crosses, for agronomic, color, and fruit quality traits in order to select outstanding genotypes. Twenty crosses were obtained by combining four elite red female parents with five male color donors. The experiment was established under a randomized complete block design with four replications and 10 plants per experimental unit. Yield components, fruit quality, and color characteristics were evaluated. The agronomic performance of the crosses and parents was estimated, along with mean heterosis, high-parent heterosis, and type of gene action. Significant differences among crosses were detected for all evaluated variables, except for the color component b*. Crosses involving the pink parent showed higher values for yield components, whereas crosses involving orange parents exhibited better fruit quality. Phenotypic values among parents were significant for total fruit weight (TFW), total number of fruits (TNF), days to flowering (DF), days to maturity (DM), and the color variables L*, a*, and b*. Mean heterosis reached values of up to 94.5 %, indicating average effects of partial dominance and dominance toward the male parent.
This study evaluated heterosis and selected genetic parameters for 14 quantitative traits in brinjal (eggplant). Eight lines and three testers were crossed in a line × tester design to produce 24 F1 hybrids, which were evaluated during the rabi and kharif seasons of 2022–23. The experiment was conducted at the College Farm, College of Horticulture, Jagudan, and the Fruit Research Station, Dehgam, using a randomised block design with three replications. Standard agronomic practices were followed, and observations were recorded from six selected plants per treatment across replications for plant height, plant spread, flowering and picking traits, fruit yield, phenolic content and related characters. Heterosis was expressed as the percentage increase or decrease relative to the better parent (heterobeltiosis) and the standard check (standard heterosis). For plant height at 90 DAT, several crosses exhibited positive heterosis, with L5 × T1 and L7 × T2 recording the highest pooled standard heterosis values. L5 × T1 also performed best for plant height at the last picking and showed consistently favourable heterosis for plant spread in both the E–W and N–S directions. Desirable negative heterosis for days to first flower initiation and days to first picking was recorded in L3 × T1, L2 × T1 and L5 × T1. L3 × T1 and L5 × T1 exhibited desirable positive heterosis for days to last picking. These crosses may be useful for improving growth and flowering traits in brinjal, subject to further evaluation for yield, quality and stability.
N. Nadoda, H. R. Barot, D. Barot et al.· International Journal of Pla...· 0 citations
Tomato (Solanum lycopersicum L.) is an important vegetable crop valued for its nutritional quality, wide adaptability and economic significance. The present study was conducted to evaluate genetic variability, character association and genetic diversity among tomato accessions for yield and its contributing traits. The experiment was carried out during the spring-summer season of 2020 and 2021 at the experimental field of horticulture, School of Agriculture, Lovely Professional University. A total of 26 tomato accessions, comprising 6 repatriated genotypes and 20 hybrids developed through a full diallel mating design, were evaluated in a randomised complete block design (RCBD) with 3 replications and 15 quantitative and quality-related characters. Significant variation was found among the different germplasms for all characters. Yield and yield contributing characters showed high heritability along with genetic gain, indicating major role of these characters in expression of these characters. Yield per plant exhibited a strong and positive relationship with number of fruits per plant, fruit width, fruit length and mean fruit weight. Path coefficient analysis indicated that the number of fruits per plant and reducing sugar content exerted the highest positive direct influence on yield. Principal component analysis explained 81.70 % of the total variation through five components. Cluster analysis grouped accessions into two major clusters irrespective of geographic origin, indicating wide genetic diversity. Accessions T10 and F1022 were identified as the most divergent and may serve as promising parents for yield improvement in tomato breeding programs.
S. Vinit, K. Khushboo, T. Nikhil et al.· Plant Science Today· 0 citations
Cherry tomato (Solanum lycopersicum L. var. cerasiforme) germplasm maintained in West Garo Hills, Meghalaya, represents a useful source of morphological variability for selection. The present investigation evaluated 15 germplasm lines during 2023 at the Demonstration unit, Biotech KISAN Hub, Tura, using a randomised block design with three replications. Twenty-two horticultural characters were assessed to estimate phenotypic and genotypic coefficients of variation, broad-sense heritability and genetic advance. Analysis of variance revealed highly significant differences among the germplasm lines for the characters studied, indicating substantial variability. Phenotypic coefficients of variation were higher than the corresponding genotypic coefficients for all characters. Fruit weight recorded the highest phenotypic coefficient of variation (39.16%), while fruit yield per plant recorded the highest genotypic coefficient of variation (36.72%). The lowest phenotypic coefficient of variation was observed for days to first fruit harvest (4.43%), whereas the lowest genotypic coefficient of variation was also recorded for days to first fruit harvest (3.62%). Broad-sense heritability ranged from 28.73% to 94.54%, with the highest estimate for pericarp thickness. Genetic advance as a percentage of the mean ranged from 6.11 to 71.43%, with the highest value for fruit yield per plant. The observed combination of variability, heritability and genetic advance indicates useful scope for selection of promising cherry tomato germplasm under West Garo Hills conditions.
Susmita Chakraborty, Arindam Barman, Vikash Panggam· International Journal of Pla...· 0 citations
The use of grafted seedlings has become an important strategy in tomato production to overcome soil-borne diseases and various abiotic stresses. In recent years, tomato relatives have gained attention as valuable genetic resources for rootstock breeding due to their resistance traits and wide genetic diversity. Among these species, Solanum pimpinellifolium has been considered a promising donor for improving stress tolerance, adaptability, and seed vigor in cultivated tomato. This study aimed to determine the interspecific hybridization compatibility between Solanum lycopersicum lines and wild S. pimpinellifolium genotypes and to evaluate the germination and seedling emergence performance of the resulting hybrid seeds. Three S. lycopersicum lines were used as female parents and thirteen S. pimpinellifolium genotypes as male parents, resulting in 39 hybrid combinations. Hybridization success was evaluated based on fruit set rate, seed number per fruit, seed yield per fruit, and 100-seed weight. Additionally, germination and emergence tests were performed under two temperature conditions (24 and 27 °C) using three replicates of 30 seeds. Germination percentage, emergence percentage, and time to 50% emergence were determined. The obtained data were analyzed using analysis of variance in the R statistical environment, and mean comparisons were performed using Duncan’s multiple range test (p < 0.05). Fruit set rates among hybrid combinations ranged from 77% to 100%, indicating a generally high level of cross-compatibility between the parental genotypes. Seed number per fruit varied between 54 and 109, while seed yield per fruit ranged from 0.199 g to 0.607 g. Germination percentages were generally high under both temperature conditions, ranging from 85.3% to 100.0% at 24 °C and from 77.3% to 100.0% at 27 °C. In general, increasing temperature shortened the time to 50% emergence and accelerated seedling development. Some hybrid combinations, such as RSP14, RSP16, and RSP18, showed stable and high performance under both temperature conditions. Some hybrid combinations such as RSP14, RSP16, and RSP18 showed stable and high performance across both temperature conditions. Overall, the results demonstrated that interspecific hybridization between S. lycopersicum and S. pimpinellifolium can produce viable hybrid seeds with high germination and emergence performance. The identified superior combinations may serve as valuable genetic materials for future tomato rootstock breeding programs.
Şeyma Yücel, Ahmet Balkaya, Rıfat Üngör· Black sea journal of agricul...· 0 citations
Okra [
Abelmoschus esculentus
(L.) Moench] is a widespread traditional vegetable in Burkina Faso, whose fruits are rich in trace elements, vitamins, fiber, and mucilage. Despite favorable soil and climatic conditions, production remains low due to socio-cultural constraints and a lack of high-performing, adapted varieties. To identify okra lines with superior agromorphologique performance and potential for varietal selection, eight lines seven from Burkina Faso (V1, V2, V3, V4, V5, V6 and V8) and one from Mali (V7) were characterized using a randomized complete block design (RCBD) with three replications. Data were collected on nine qualitative and sixteen quantitative traits. The results showed variability in stem, fruit, and seed characteristics. Indeed, the most significant variations in phenotypic traits were observed in stem and fruit coloration, seed weight per plant, immature fruit weight, and seed yield. Lines V3, V5, V7, and V8 exhibited desirable traits, notably earliness, large leaf size, fruit coloration, a high number of seeds per fruit, high seed weight, and high yield and could be used in a hybridization program to develop okra varieties that combine a maximum of desired characteristics. Seed yield (SY) showed the highest heritability associated with the most significant genetic gain. This combination indicates strong additive gene action, suggesting that direct selection of the best lines based on field performance will allow for rapid and significant improvement in okra productivity.
Hamadoun Sidibé, Brahime Tingueri, V. Kabre et al.· International Journal of App...· 0 citations
Onion (
Allium cepa
L.) is the second most commonly produced and consumed vegetable worldwide. In West Africa, high heat and moisture are key constraints for onion productivity during the rainy-season. This study aimed to assess the combining ability, heterosis, and genetic variability of five onion genotypes and 10 F
1
hybrids generated through a half diallel mating design to identify superior parental lines and hybrids adapted to heat and moisture conditions.
The experiment involved five parents: Prema 178, EW001, Violet d’Abéché, Violet de Galmi and AC980. The trials were implemented on station at the World Vegetable Center in Samanko by using a randomized complete block design. Twelve morphological, physiological, and agronomic traits were evaluated.
Analysis of variance showed substantial genetic variability. Significant general combining ability (GCA) and specific combining ability (SCA) effects indicated that both additive and non-additive gene actions influence key traits. The best general combiner was Parent P1 (Prema 178), which had the best positive GCA effects on plant survival rate (5 and 4.98), plant height (2.36 and 2.53), number of bulbs (5.82 and 3.38), and bulb yield (2.09 and 2.44). The hybrids P4×P5 (Violet de Galmi x AC980) and P1xP5 (Prema 178×AC980) had the most positive SCA effects and the best heterosis values over the midparent (105.26%) and better parent (94.56%) for bulb yield, as well as strong vigor and root growth.
These results demonstrate that the hybrids P4×P5, P1×P5, and P3×P5 are good candidates for multilocation testing in high heat and high moisture prone conditions.
A. Traore, J. Tignégré, Z. Kiébré et al.· Frontiers in Horticulture· 0 citations
