Heterosis Studies for Fruit Yield and its Components in Tomato (Solanum lycopersicum L.)

Ghadage, Nitesh; Kulkarni, G. U.; Meta, H.R.; Shyadambi, Raju

doi:10.20546/ijcmas.2019.807.121

Cited by 2 publications

(1 citation statement)

References 8 publications

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“…As a result, it was discovered that mutant (P13) with developed hybrids had the highest heterosis for attributes relevant to yield. Indurani and Veraragavatham [5]; Chattopadhaya et al [11]; Shankar et al [6]; Kumar et al, [8]; Rehana et al [9]; Ghadage et al [10] and Mishra et al (2021) reported significant and favourable heterosis over superior parents for yield traits in tomato.…”

Section: Heterosis For Different Horticultural Traits Related To Yiel...mentioning

confidence: 99%

Studies on Heterosis Employing Leaf Curl Resistant Mutant for Several Horticultural Traits Related to Earliness and Yield in Tomato (Solanum lycopersicum L.)

Srivastava¹,

Prasad²,

Meena³

2022

IJECC

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Aim: Determine the degree of heterosis for the yield and earliness component qualities in order to generate hybrids for early and high yield through heterosis breeding. Study Design: The experiment was laid out in Randomized Block Design with three replications. Place and Duration of Study: The experiment was conducted at the ICAR-Indian Institute of Vegetable Research in Varanasi, which is located about 20 kilometres to the southwest of the city on the Ganga River's bank at an elevation of 128.93 metres above mean sea level and lies between 82.52 degrees east and 25.10 degrees north (MSL). The experiment was carried out in late Kharif in 2015 and 2016, as well as in the summer of 2017. Methodology: In total 33 crosses were developed using 14 tomato genotypes, including the tomato leaf curl virus susceptible variety Punjab Chhuhara and the advanced breeding line H-88-78-2, a mutant resistant to leaf curl with altered inflorescence and ripening, in order to evaluate the heterosis for earliness and yield attributes. Three cultivars were the male parents (testers), while eleven cultivars were the female parents (line). As a result, 33 tomato hybrids were developed adopting the line tester method. Each line in this design is paired with one of the "t" testers using a random sample of "I" lines. Over the better parent, the mid parent, and the standard/check (Arka Rakshak) heterosis was estimated according to Singh and Chaudhary (1979). Results: Based on results from both seasons, the cross P7×P13 showed the highest significant negative heterosis per cent for earliest traits like days to first flower (-46.43, -43.80), days to 50% flowering (-35.66, -50.00), and days to first ripening (-30.09, -28.74) over superior parent in first and second seasons, respectively. The hybrid P9×P13 displayed the highest significant heterosis per cent for the features linked to yield in the first and second seasons, for the number of fruits per plant (71.78, 592.04) and yield per plant (75.11, 425.88). The outcome showed that minimum days of first blooming and first ripening are indicative of earliness, and the maximum yield per plant was associated with the highest possible number of fruits per plant. Conclusion: Based on the results of both seasons, it was determined that the tomato mutant (P13) generated hybrids had low and negative heterosis for qualities associated to earliness and high and positive heterosis for traits related to yield. As a result, the number of fruits per plant and the number of days before the first fruit ripens are better measures of output and earliness. By altering this particular attribute, it would be possible to improve productivity with early crops. Breeders should therefore concentrate largely on the number of fruits and the days to first ripening in order to achieve a high and early yield.

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Section: Heterosis For Different Horticultural Traits Related To Yiel...mentioning

confidence: 99%

Studies on Heterosis Employing Leaf Curl Resistant Mutant for Several Horticultural Traits Related to Earliness and Yield in Tomato (Solanum lycopersicum L.)

Srivastava¹,

Prasad²,

Meena³

2022

IJECC

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Analysis of Re-Heterosis for Yield and Fruit Quality in Restructured Hybrids, Generated from Crossings among Tomato Recombinant Lines

et al. 2021

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Randomized complete block design was used, with three replications. Heterosis for yield and fruit quality characteristics was studied, and expressed as Relative heterosis, heterobeltiosis and Standard heterosis. It would be expected, according to the dominance model, that the heterosis recorded after crossing the recombinant lines, having only a small portion of recessive deleterious alleles, would be minimal. The results showed that the elite recombinant inbred lines became the parents of elite restructured hybrids, with increased levels of re-heterosis for all characters measured. This may prove that dominance is not the only case in explaining heterosis in tomato for yield components and fruit quality characteristics. Several recombinant lines, and most of the new reconstructed F1 hybrids, showed excellent productivity under a low input farming system. The evaluation and selection of the different types of cultivars (recombinant pure lines or reconstructed hybrids) under low input conditions could point towards the most suitable/ideal genotype for organic cultivation.

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Heterosis Studies for Fruit Yield and its Components in Tomato (Solanum lycopersicum L.)

Cited by 2 publications

References 8 publications

Studies on Heterosis Employing Leaf Curl Resistant Mutant for Several Horticultural Traits Related to Earliness and Yield in Tomato (Solanum lycopersicum L.)

Studies on Heterosis Employing Leaf Curl Resistant Mutant for Several Horticultural Traits Related to Earliness and Yield in Tomato (Solanum lycopersicum L.)

Analysis of Re-Heterosis for Yield and Fruit Quality in Restructured Hybrids, Generated from Crossings among Tomato Recombinant Lines

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