Genetic Analysis of Yield and Yield-Attributing Traits for High Temperature Resistance in Tomato

Bhattarai, Uttam; Sharma, Akashi; Das, Ranjan; Talukdar, P.

doi:10.1080/19315260.2015.1118421

Cited by 12 publications

(13 citation statements)

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“…Analysis of the genetic architecture behind important sub-traits may be pursuit using crosses between specific contrasting cultivars, such as Nagcarlang and NCHS-1 in case of pollen thermotolerance (Xu et al 2017). The suitability of Nagcarlang for such a study is supported by the finding that it was among the best performing genotypes regarding pollen fertility and fruit set under high temperature field conditions and general combining ability of these traits (Dane et al 1991;Bhattarai et al 2016).…”

Section: Resultsmentioning

confidence: 64%

“…While all these abnormalities can occur, it is not fully clear which aspects are the most limiting for tomato fruit set under heat stress and whether tolerance levels for the various processes are related to each other. Screening of sets of tomato cultivars and wild relatives for reproduction under heat stress (LTMH or STHS) has revealed considerable, heritable natural variation in heat tolerance and several studies suggested that viability of male and female gametes, as well as the level of style protrusion are major determinants for reproductive success under these conditions, dependent on the cultivars studied (Rick and Dempsey 1969;Rudich et al 1977;Levy et al 1978;Dane et al 1991;Saeed et al 2007;Bhattarai et al 2016).…”

Section: Introductionmentioning

confidence: 99%

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Heat stress affects vegetative and reproductive performance and trait correlations in tomato (Solanum lycopersicum)

et al. 2017

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High ambient temperature has adverse effects on plant vegetative and reproductive development and reduces crop yield. To better understand the importance of male and female fertility for tomato fruit set ability under high temperature conditions and to test whether heat tolerance levels among and between reproductive and vegetative traits of genotypes correlate with each other, 13 tomato cultivars were subjected to long-term moderate heat (LTMH) or short-term heat shock (STHS), depending on the trait that was evaluated. LTMH caused significant decrease in performance of nearly all reproductive traits, i.e. pollen viability, pollen number, female fertility, seeded-fruit set and flower number per inflorescence, but not in inflorescence number. Considerable variation was found among cultivars, both under control and LTMH conditions. The cultivars Nagcarlang, Saladette and Malintka 101 produced a higher percentage of viable pollen under LTMH. For fruit set under LTMH condition, only cultivars that had been previously reported as being heat-tolerant produced fruits with seeds. STHS negatively affected vegetative traits concerning seedling survival and membrane stability. Correlation analysis revealed relationships between various traits within the control and heat treatments, but not between the two. Under heat stress fruit set was positively correlated with pollen viability, as well as with flower number per inflorescence. However, no significant correlations were found between vegetative and reproductive traits. Our data highlight the prominent role of pollen viability for tomato fertility under LTMH growth conditions. The observed variation in thermotolerance among different cultivars offers the possibility to decipher underlying physiological and genetic mechanisms.

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Section: Resultsmentioning

confidence: 64%

Section: Introductionmentioning

confidence: 99%

Heat stress affects vegetative and reproductive performance and trait correlations in tomato (Solanum lycopersicum)

et al. 2017

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“…The total number of flowers produced by a tomato plant correlates with yield per plant under CMH condition (Bhattarai et al 2016 ). We examined flower production by assessing the number of inflorescences and number of flowers per inflorescence.…”

Section: Discussionmentioning

confidence: 99%

“…Under these conditions, male fertility and the position of the stigma relative to the anther cone seem to be major factors limiting fruit and seed set (Dane et al 1991 ; Levy et al 1978 ). A number of studies have assessed tomato cultivars for fruit set under CMH condition and identified relatively well-performing genotypes (Levy et al 1978 ; Dane et al 1991 ; Sato et al 2000 ; Sato et al 2004 ; Bhattarai et al 2016 ). The largest, multi-year characterisations by the Asian Vegetable Research and Development Center (AVRDC) identified 39 tolerant lines, some of which have already been utilised in tomato breeding programs (Opeña et al 1992 ; Scott et al 1995 ; Gardner 2000 ).…”

Section: Introductionmentioning

confidence: 99%

Mapping quantitative trait loci for heat tolerance of reproductive traits in tomato (Solanum lycopersicum)

Driedonks

Rutten

et al. 2017

Mol Breeding

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Global warming has become a worldwide concern due to its adverse effects on agricultural output. In particular, long-term mildly high temperatures interfere with sexual reproduction and thus fruit and seed set. To uncover the genetic basis of observed variation in tolerance against heat, a bi-parental F2 mapping population from two contrasting cultivars, i.e. Nagcarlang and NCHS-1, was generated and phenotyped under continuous mild heat conditions for a number of traits underlying reproductive success, i.e. pollen viability, pollen number, style length, anther length, style protrusion, female fertility and flowering characteristics, i.e. inflorescence number and flowers per inflorescence. Quantitative trait loci (QTLs) were identified for most of these traits, including a single, highly significant one for pollen viability, which accounted for 36% of phenotypic variation in the population and modified pollen viability under high temperature with around 20%. QTLs for some traits colocalised, indicating trait dependency or pleiotropic-effect loci. We conclude that a limited set of major genes determines differences in performance of reproductive traits under continuous mild heat in tomato. The results contribute to our fundamental understanding of pollen thermotolerance and may support development of more heat-tolerant tomato varieties.Electronic supplementary materialThe online version of this article (doi:10.1007/s11032-017-0664-2) contains supplementary material, which is available to authorized users.

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“…Using a 5 • 5 diallel cross design, Bhattarai et al (2016) found that additive gene action had the largest effect on morphological traits associated with heat tolerance, whereas yield was conditioned by nonadditive gene action (dominance and overdominance). They also found correlations between yield and yieldattributing traits (early flowering and maturity, more flowers per plant, flower retention, faster fruit set, more fruiting clusters, and more fruit per plant) under heat stress conditions.…”

Section: Discussionmentioning

confidence: 99%

Heritability of Flower Number and Fruit Set under Heat Stress in Tomato

Panthee¹,

Kressin²,

Piotrowski³

2018

horts

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The growing volatility of the climate, and its potential impact on crop production, has prompted several physiologic and genetic analyses under high-temperature conditions. Tomato is grown in warm temperate, subtropical, and tropical regions of the world, where daytime and nighttime temperatures regularly exceed the optimum temperatures for tomato growth during the summer, exerting stress on tomato production. Recent trends indicate more frequent extreme summer temperatures, which may grow even greater in the future, impacting crop growth. The objective of the current study was to estimate the heritability of flower and fruit set ability of tomato populations under heat stress conditions so that improvement for these traits can be planned. We developed two tomato populations using contrasting parents from the North Carolina State University (NCSU) tomato breeding program and the World Vegetable Center (formerly Asian Vegetable Research and Development Center). The F2 and F2-derived F3 families (F2:3 populations) were grown at the Piedmont Research Station (PRS), Salisbury, NC, where summer growing temperatures are warmer than optimum for tomato production. Heritability estimates of the number of flowers per cluster, the number of fruit per cluster, and fruit set (measured as a percentage) were determined in two populations of tomato—NC10137 (NC714 × CLN-2413A) and NC10418 [230 HS-1(99) × NC 1CS]—by regression analysis using the offspring-on-parents method. Broad-sense heritability across the traits was high (47.2%–100%), whereas narrow-sense heritability was very low (1.4%–22.5%). There was a positive correlation between the number of flowers and the number of fruit per cluster (r = 0.50, P < 0.05), which was in close agreement with previous findings. These findings will be useful in investigating the genetic control of heat stress tolerance in tomato and in facilitating crop improvement in the future.

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Genetic Analysis of Yield and Yield-Attributing Traits for High Temperature Resistance in Tomato

Cited by 12 publications

References 13 publications

Heat stress affects vegetative and reproductive performance and trait correlations in tomato (Solanum lycopersicum)

Heat stress affects vegetative and reproductive performance and trait correlations in tomato (Solanum lycopersicum)

Mapping quantitative trait loci for heat tolerance of reproductive traits in tomato (Solanum lycopersicum)

Heritability of Flower Number and Fruit Set under Heat Stress in Tomato

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