Combining Ability in Diploid and Triploid Sugarbeet Hybrids from Diverse Parents

Dolhagaray, José Manuel Lasa; Romagosa, I.; Hecker, R. J.; Madoz, José

doi:10.5274/jsbr.26.1.10

Cited by 5 publications

(2 citation statements)

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“…there was no heterosis [ 45 ]. Another study, consisting of 120 hybrids, reported that F1 triploid hybrids averaged a 9% higher root yield than F1 diploid hybrids [ 46 ]. However, the lines used in this study were genetically diverse: the 15 male parents originated from different European countries.…”

Section: Discussionmentioning

confidence: 99%

Hybridity has a greater effect than paternal genome dosage on heterosis in sugar beet (Beta vulgaris)

et al. 2018

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BackgroundThe phenomenon of heterosis is critical to plant breeding and agricultural productivity. Heterosis occurs when F1 hybrid offspring display quantitative improvements in traits to levels that do not occur in the parents. Increasing the genome dosage (i.e. ploidy level) of F1 offspring can contribute to heterosis effects. Sugar beet (Beta vulgaris) provides a model for investigating the relative effects of genetic hybridity and genome dosage on heterosis. Sugar beet lines of different ploidy levels were crossed to generate diploid and triploid F1 offspring to investigate the effect of; (1) paternal genome dosage increase on F1 heterosis, and; (2) homozygous versus heterozygous tetraploid male parents on F1 triploid heterosis. A range of traits of agronomic and commercial importance were analyzed for the extent of heterosis effects observed in the F1 offspring.ResultsComparisons of parental lines to diploid (EA, EB) and triploid (EAA, EBB) F1 hybrids for total yield, root yield, and sugar yield indicated that there was no effect of paternal genome dosage increases on heterosis levels, indicating that hybridity is the main contributor to the heterosis levels observed. For all traits measured (apart from seed viability), F1 triploid hybrids derived from heterozygous tetraploid male parents displayed equivalent levels of heterosis as F1 triploid hybrids generated with homozygous tetraploid male parents, suggesting that heterosis gains in F1 triploids do not arise by simply increasing the extent of multi-locus heterozygosity in sugar beet F1 offspring.ConclusionsOverall, our study indicates that; (1) increasing the paternal genome dosage does not enhance heterosis in F1 hybrids, and; (2) increasing multi-locus heterozygosity using highly heterozygous paternal genomes to generate F1 triploid hybrids does not enhance heterosis. Our findings have implications for the design of future F1 hybrid improvement programs for sugar beet.Electronic supplementary materialThe online version of this article (10.1186/s12870-018-1338-x) contains supplementary material, which is available to authorized users.

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Section: Discussionmentioning

confidence: 99%

Hybridity has a greater effect than paternal genome dosage on heterosis in sugar beet (Beta vulgaris)

et al. 2018

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“…In a study with five sugar beet varieties, results revealed that GCA effects gave higher contribution to the inheritance of RY and sucrose content (Helmerick, Finkner, & Doxtator, ). In the Lasal, Romagosa, Hecke, and Sanz () study, no significant female GCA effects were identified for triploid hybrids, whereas GCA estimates were significant for the same CMS lines in diploid hybrids. Several studies have shown that sucrose concentration is conditioned largely by additive gene effects, whereas RY is controlled by both additive and non‐additive components (Ahmadi & Assad, ; Biancardi, McGrath, Panella, Lewellen, & Stevanato, ; Doney, ; Hecker, ; Helmerick et al, ; MacLachlan, ; Powers, Schmehl, Federer, & Payne, ; Smith, Hecker, Maag, & Rasmuson, ; Stancic, Zivic, Petrovic, & Knezevic, ).…”

Section: Introductionmentioning

confidence: 89%

Combining abilities of sugar beet genotypes for root‐ and sugar‐related traits under multi‐environment trials

2019

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Sugar beet contributes to one-third of the world's sugar supply (Draycott, 2006). Sugar beet has been cultivated on over 10,000 hectares of Iranian arable land in 2016 with an average root yield (RY) of 54 t/ha (FAOSTAT, 2018). The aim of sugar beet breeding is to select stable varieties producing the highest amount of extractable sugar per unit area. Although the environment affects the expression of sugar yield and related quality traits, selection for stable varieties is still possible. This is achieved through recurrent selection methods for better combining ability

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Genetics and Breeding

Bosemark¹

2006

Sugar Beet

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Combining Ability in Diploid and Triploid Sugarbeet Hybrids from Diverse Parents

Cited by 5 publications

References 10 publications

Hybridity has a greater effect than paternal genome dosage on heterosis in sugar beet (Beta vulgaris)

Hybridity has a greater effect than paternal genome dosage on heterosis in sugar beet (Beta vulgaris)

Combining abilities of sugar beet genotypes for root‐ and sugar‐related traits under multi‐environment trials

Genetics and Breeding

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