Heterosis Studies for Yield and its Components in Tomato (<i>Solanum lycopersicum</i>L.) Under Valley Conditions of Manipur

Singh, Naorem Brajendra; Paul, Amitava; Wani, Shabir Hussain; Laishram, J. M.

doi:10.5958/j.2319-118x.1.3.019

Cited by 9 publications

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“…Thus the heterosis for flowering time is considered to be an economic parameter for this study. The negative heterosis for flowering time was also reported in earlier studies [5,6,14,15].…”

Section: Days To 1 St Floweringsupporting

confidence: 84%

“…Heterosis was first observed by Hedrick and Booth [4] in tomato for higher yield. Afterwards a numerous studies have been done in relation to heterosis for yield, its components and quality traits [3,5,6,7,8]. However, the exploitation of heterosis is a quick and an effective way of selecting hybrids for high yield potential, earliness and quality attributes.…”

Section: Introductionmentioning

confidence: 99%

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Studies on Character Improvement in Tomato (Solanum lycopersicum L.) by Heterosis

Salim

Rashid

Ali

et al. 2019

APRJ

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Most of the tomato varieties in Bangladesh are of inbred type and produced low yield indicating need to develop high yielding variety through the hybridization. Heterosis breeding is used to improve yield and quality of tomato because traditional methods cannot be used to achieve this goal. A half diallel design was employed to develop F1s from seven parents of winter tomato. 21 F1s along with their parents were evaluated for yield and quality traits. Heterosis analysis revealed that heterotic vigor was present for growth and yield characters among hybrids. Heterosis for better parent was negative for days to flowering, days to harvest, harvest duration, number of locules, and number of seeds per fruit but positive for fruit set, number of fruits per plant, yield per plant, pericarp thickness and TSS. None of the hybrid was heterotic for all characters simultaneously. The hybrids G5, G13, G16, G17, G18, and G20 had 25.73, 19.92, 39.20, 36.49, 53.77, and 50.31% higher heterosis compared to the better parent, respectively, for fruit yield per plant as well as for many other yield contributing traits. High heterosis for yield appears to be the consequence of heterosis of yield attributing traits; therefore, these hybrids offer scope of developing improved commercial lines through heterosis breeding.

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“…Thus the heterosis for flowering time is considered to be an economic parameter for this study. The negative heterosis for flowering time was also reported in earlier studies [5,6,14,15].…”

Section: Days To 1 St Floweringsupporting

confidence: 84%

Section: Introductionmentioning

confidence: 99%

Studies on Character Improvement in Tomato (Solanum lycopersicum L.) by Heterosis

Salim

Rashid

Ali

et al. 2019

APRJ

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“…Out of the 20 resultant hybrids, 13 hybrids were found to be better than the standard check (33.00). Earlier, Kumari and Sharma (2011), Singh et al (2012); Patwary et al (2013) also found similar estimates for this trait while evaluating tomato hybrids. Days to marketable maturity are also a key determining factor of earliness which fetches remunerative returns to the farmers.…”

Section: Resultsmentioning

confidence: 58%

Compatibility of Insecticides and Fungicides Targeting Major Insect Pests and Diseases of Rice

Seni¹,

Pal²,

Naik³

2018

IJBSM

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With an objective to estimate the performance of tomato hybrids with respect to their yield and yield contributing traits, an experiment was conducted at the experimental farm of RHR&TS, Jachh, Kangra, Himachal Pradesh with 20 hybrids along with their 12 diverse parents and standard check Naveen 2000+, which is a leading commercial tomato hybrid in Himachal Pradesh. The hybrids were produced during Rabi 2015 by following line×tester mating design and were evaluated during kharif, 2016. The later experiment was designed in Randomized Complete Block Design (RCBD) with three replications. The obtained results revealed that the hybrid, EC-620410×Solan Lalima was earliest among all the entries in terms of days to 50% flowering, while both the hybrids between EC-8910155 and FT-5 were earliest in terms of days taken to marketable maturity. The hybrid between BT-1-1×FT-5 had maximum number of fruits cluster 1 as well as maximum yield plant 1. For average fruit weight, the hybrids of BT-1-1×Solan Lalima were found best among all the hybrids and their parents. The hybrid, LE-79-5×FT-5 produced maximum number of marketable fruits plant 1. Moreover this hybrid recorded minimum severity of Alternaria blight (early blight). Hence, for commercial exploitation of heterosis for earliness and yield in tomato, these hybrids are needed to be tested in multiple locations for stability before releasing as varieties.

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“…En este contexto destaca que siete cruzas que se ubican en el grupo superior de heterosis para PTF (LOR82C, LOR81C, LOR97C, LOR103C, LOR103R, LOR84C, LOR97R), también se ubicaron en el grupo superior de heterosis para NTF, pero ninguna estuvo en el grupo de alta heterosis para PPF, excepto LOR81C. Después del rendimiento por planta el peso promedio de fruto fue el que presentó la mayor heterosis, lo cual coincide con lo reportado por Singh et al (2012) quienes encontraron que para esta variable la heterosis fluctuó de -57 a 103 % en 21 cruzas evaluadas.…”

Section: Heterosisunclassified

HETEROSIS DE CRUZAS ENTRE LINEAS DE TOMATE (Solanum lycopersicum L.) NATIVO MEXICANO TIPO PIMIENTO Y LINEAS TIPO SALADETTE

et al. 2016

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En México el tomate o jitomate (Solanum lycopersicum L.) es una de las hortalizas de mayor importancia por su superficie cultivada, por las divisas y el número de empleos que genera, y por su valor alimenticio y cultural. Sin embargo, el material nativo mexicano “criollo” se ha estudiado poco en cuanto a su rendimiento, calidad, resistencia a factores bióticos y abióticos, y en su potencial como fuente de germoplasma en programas de mejoramiento genético. En este trabajo se evaluó el comportamiento heterótico de 40 cruzas formadas entre 10 líneas S5 derivadas de colectas de jitomate nativo mexicano tipo pimiento, localmente llamado “chino criollo”, y cuatro líneas S5 derivadas de híbridos comerciales de jitomate tipo “saladette”. El experimento se estableció en condiciones de invernadero e hidroponía, en un diseño experimental de bloques completos al azar con tres repeticiones y cinco plantas por repetición. Las variables que se registraron fueron peso total de fruto (PTF), peso promedio de fruto (PPF), número total de frutos (NTF), firmeza del fruto (FF), número de flores del tercer racimo (NFR3), número de racimos por planta (NRP) y días a floración del primer racimo (DF1). Hubo diferencias significativas (P ≤ 0.01) entre genotipos, cruzas, líneas y grupos de materiales para la mayoría de las variables. La cruza de mayor rendimiento fue LOR111R, con 3624 g/planta, seguida del testigo El Cid con 34529 g/planta. En las variables PMF, NTF y NRP las cruzas al menos igualaron y en algunos casos superaron al híbrido testigo. Se obtuvieron valores positivos de heterosis media para la mayoría de las variables, excepto en días a floración. En el rendimiento de fruto la heterosis media varió de -21.8 a 111.2 %, mientras que para PPF fue de -13 a 80.7 %. Los resultados del comportamiento per se de las líneas y de sus cruzamientos indican una amplia divergencia genética, la cual se reflejó en altos rendimiento y alta heterosis media que se pueden aprovechar en programas de mejoramiento genético de jitomate.

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Heterosis Studies for Yield and its Components in Tomato (Solanum lycopersicumL.) Under Valley Conditions of Manipur

Cited by 9 publications

References 0 publications

Studies on Character Improvement in Tomato (Solanum lycopersicum L.) by Heterosis

Studies on Character Improvement in Tomato (Solanum lycopersicum L.) by Heterosis

Compatibility of Insecticides and Fungicides Targeting Major Insect Pests and Diseases of Rice

HETEROSIS DE CRUZAS ENTRE LINEAS DE TOMATE (Solanum lycopersicum L.) NATIVO MEXICANO TIPO PIMIENTO Y LINEAS TIPO SALADETTE

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