Analysis of the genetic control of β-carotene and l-ascorbic acid accumulation in an orange-brownish wild cherry tomato accession
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Other documents of the author: Adalid, Ana María; Roselló, Salvador; Valcárcel, Mercedes; Nuez Viñals, Fernando
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comunitat-uji-handle2:10234/2508
comunitat-uji-handle3:10234/6999
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http://dx.doi.org/10.1007/s10681-011-0584-x |
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Title
Analysis of the genetic control of β-carotene and l-ascorbic acid accumulation in an orange-brownish wild cherry tomato accessionDate
2012-03Publisher
Springer NetherlandsISSN
1573-5060Bibliographic citation
Euphytica (March 2012) 184, 2, p. 251-263Type
info:eu-repo/semantics/articlePublisher version
http://link.springer.com/article/10.1007%2Fs10681-011-0584-x?LI=trueSubject
Abstract
An additive-dominance, additive × additive (ADAA) and genotype × environment interaction mix model was used to study the genetic control of β-carotene and l-ascorbic acid in six basic generations (P1, P2, F1, F2, BC1P1 ... [+]
An additive-dominance, additive × additive (ADAA) and genotype × environment interaction mix model was used to study the genetic control of β-carotene and l-ascorbic acid in six basic generations (P1, P2, F1, F2, BC1P1 and BC1P2) of tomato derived from the cross CDP8779 accession (Solanum lycopersicum L.) × CDP4777 accession (S. lycopersicum var. cerasiforme). The study was performed in two environments: (1) open field; (2) protected environment, consisting of hydroponic cultivation in a glasshouse. The results indicate that β-carotene accumulation was mainly additive (32.2% of the genetic component), with a small dominant component (4.2%) and an important additive × environment interaction contribution (63.6%). In target environments with moderate to high temperatures and no limiting radiation, this the expression additive × environment interaction could substantially enhance the β-carotene content. This trait showed also a high narrow-sense heritability (h 2 = 0.62). Ascorbic acid accumulation was also mainly additive (61.7% of the genetic component), with a minor additive epistatic component (21.5%). This epistatic effect caused a negative heterosis that reduced the positive main additive effect. Nevertheless, in the described target environments, the additive × environment interaction contribution (16.8%) may enhance the ascorbic acid content and compensate for the negative heterosis effect. The total narrow-sense heritability of this trait can be considered useful (h 2 = 0.52). In conclusion, the CDP4777 accession is a very interesting donor parent for the joint improvement of β-carotene (without diminishing lycopene content) and ascorbic acid content in commercial nutraceutical tomato breeding programmes; the F1 hybrids derived from this accession showed nearly 450% of the commonly reported average β-carotene content and close to 130% of the ascorbic acid content of the female parent. [-]
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