QTLs detected for individual sugars and soluble solids content in apple

Guan, Yingzhu; Peace, Cameron; Rudell, David R.; Verma, Sujeet; Evans, Kate

doi:10.1007/s11032-015-0334-1

Cited by 84 publications

(81 citation statements)

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“…Thus, it allows exploitation of the full genetic potential contained in a breeding program. While PBA has been successfully applied in sweet cherry ) and apple (Guan et al 2015), no studies have been reported for peach.…”

Section: Introductionmentioning

confidence: 99%

QTL mapping of pomological traits in peach and related species breeding germplasm

et al. 2015

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Peach is an economically important fruit tree crop that exhibits high phenotypic variability yet suffers from diversity-limited gene pool. Genetic introgression of novel alleles from related species is being pursued to expand genetic diversity. This process is, however, challenging and requires the incorporation of innovative genomic and statistical tools to facilitate efficient transfer of these exotic alleles across the multiple generations required for introgression. In this study, pedigree-based analysis (PBA) in a Bayesian QTL mapping framework was applied to a diverse peach pedigree introgressed with almond and other related Prunus species. The aim was to investigate the genetic control of eight commercially important fruit productivity and fruit quality traits over two subsequent years. Fifty-two QTLs with at least positive evidence explaining up to 98 % of the phenotypic variance across all trait/year combinations were mapped separately per trait and year. Several QTLs exhibited variable association with traits between years. By using the peach genome sequence as a reference, the intrachromosomal positions for several QTLs were shown to differ from those Electronic supplementary material The online version of this article (previously reported in peach. The inclusion of introgressed germplasm and the explicit declaration of the genetic structure of the pedigree as covariate in PBA enhanced the mapping and interpretation of QTLs. This study serves as a model study for PBA in a diverse peach breeding program, and the results highlight the ability of this strategy to identify genomic resources for direct utilization in markerassisted breeding.

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Section: Introductionmentioning

confidence: 99%

QTL mapping of pomological traits in peach and related species breeding germplasm

et al. 2015

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“…The pattern of volatile accumulation and emission affects fruit quality parameters odour, flavour and texture (Soukoulis et al 2012). Genes controlling these processes may react differently in varying weather conditions and depending on the cultivar (King et al 2000, Guan et al 2015. Galvez-Lopez et al (2012) confirmed that the most dominant effects on texture variables were in the descending order: the year of harvest, post-harvest storage duration and genetic factors.…”

Section: Discussionmentioning

confidence: 89%

“…Literature confirms that the annual effects on agricultural produce can be manifold and are usually year and cultivar specific (Wolfe et al 2003, Łata and Tomala 2007, Belviso et al 2013, Guan et al 2015. Bizjak et al (2013) concluded that polyphenol content in the apples is strongly dependent upon their growth conditions.…”

Section: Discussionmentioning

confidence: 99%

“…Juiciness, crispiness and low mealiness along with agreeable taste are important indicators of freshness (Peneau et al 2006(Peneau et al , 2007 and key parameters in determining consumer quality. If these characteristics remain stable over the years the cultivar has a promise of success.Literature confirms that the annual effects on agricultural produce can be manifold and are usually year and cultivar specific (Wolfe et al 2003, Łata and Tomala 2007, Belviso et al 2013, Guan et al 2015. Bizjak et al (2013) concluded that polyphenol content in the apples is strongly dependent upon their growth conditions.…”

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Annual variation in sensory characteristics of seventeen apple cultivars

Seppä

Tahvonen

Tuorila

2016

AFSci

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Sensory characteristics of 17 apple cultivars commonly grown in Finland were compared over three harvest years (2009)(2010)(2011). Descriptive analysis with a trained panel (n = 11-14) comprised 17 attributes rated from 0 ('not at all') to 10 ('very'): four appearance (green, red, area of red colour, skin waxiness), three odour (intense, grassy, fruity), five texture (hard, crispy, mealy, juicy, tough peel), and five flavour (intense, sour, sweet, astringent, diverse) attributes. Ratedintensities differed between the harvest years but their magnitude and direction of change varied according to the cultivar. Odour and flavour ratings tended to be higher in 2009 than in 2010 and 2011. The summer 2009 was fairly normal, while summer 2010 was hot and dry, and summer 2011 hot and humid. These climate may explain some of the differences between the first and the two subsequent years. Late season cultivars tended to be relatively stable against annual effects.Key words: apple, cultivar, descriptive analysis, sensory evaluation, harvest year IntroductionThe cultivation of apples (Malus domestica Borkh) is increasing in Northern Europe, although the climate and high costs restrict production (Tahvonen 2007, Lehtonen 2015. In Finland, apple cultivation is important for rural economy. The annual crop has doubled since late 1990s, being now around 5 million kg (LUKE 2015a). Domestic apples are well liked and appreciated, because they are perceived as natural, fresh and clean, and have a low content of toxic residues (Malkki 2007, Seppä 2014.The grouping of domestic apple cultivars as summer, autumn and winter, or early, mid and late season cultivars, respectively, is based on the degree day (DD5), cumulative base temperature over 5 °C, requirements for harvest maturity (Tahvonen 2007, Kaukoranta et al. 2010. Early season cultivars are important in Finnish tradition, while late season cultivars are commercially more important, as they usually have longer storage life. Seppä et al. (2013a) showed that some late season cultivars maintain eating quality beyond the end of the harvest year even without controlled atmosphere storage.The global warming is already affecting plant phenology and cultivation, but effects differ depending on the plant and geographical area (Kaukoranta et al. 2010, Sugiura et al. 2013, Lehtonen 2015. With increasing level of DD5, the limit of commercial apple cultivation is moving northwards and the trend is estimated to continue (Kaukoranta et al. 2010, Finnish Meteorological Institute 2014. Domestic late season cultivars are likely to benefit the most. Currently, the level of DD5 reached in most years in southern Finland is between 1300 and 1400, but may be as high as 1600. The effects of climate change on harvest quality are hard to estimate, as the influence of non-climatic factors, such as horticultural and technological improvements can be substantial (Sugiura et al. 2013). For example, rootstock, training system and orchard density affect the availability of light and consequently, the rate of...

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“…PBA has been made a more attractive approach in apple through guidelines on the composition of the study germplasm (Peace et al 2014), high throughput genomewide genotyping capabilities through SNP arrays (Chagné et al 2012;Bianco et al 2014Bianco et al , 2016, the availability of sets of pedigreed full-sib families (Peace et al 2014), and standardized phenotyping procedures for some major traits (Evans et al 2011a). This approach has been increasingly utilized in a variety of Rosaceous fruit species, including strawberry (Whitaker 2011;Roach et al 2016;Mangandi et al 2017), peach (Fresnedo-Ramírez et al 2015Mora et al 2017), cherry (Rosyara et al 2013;Stegmeir et al 2014;Sandefur et al 2016), and apple (Schmitz et al 2013;Bink et al 2014;Guan et al 2015, Allard et al 2016Durand et al 2017).…”

Section: Communicated By D Chagnémentioning

confidence: 99%

Two QTL characterized for soft scald and soggy breakdown in apple (Malus × domestica) through pedigree-based analysis of a large population of interconnected families

Howard

Weg

Tillman

et al. 2017

Tree Genetics & Genomes

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Soft scald and soggy breakdown are important postharvest physiological disorders of apple (Malus × domestica). 'Honeycrisp' and some of its offspring are particularly susceptible to developing these disorders. The purpose of this study was to identify molecular markers associated with high incidences of soft scald and soggy breakdown for use in marker-assisted breeding. Towards this aim, we employed a pedigree-based approach using mostly germplasm related to 'Honeycrisp.' Two quantitative trait loci (QTL) were consistently identified on linkage groups (LGs) 2 and 16 across the 2014 and 2015 harvest years. The same QTL were identified for both storage disorders, indicating that they may be physiologically related. 'Honeycrisp' is homozygous for an identical by state haplotype at the LG2 QTL that was consistently associated with a deleterious effect on soft scald and soggy breakdown incidence. This haplotype was traced through SNP-confirmed pedigrees to the following cultivars: 'Grimes Golden,' 'Northern Spy,' 'Rome Beauty,' and 'Fireside' and is common in derived apple germplasm. Haplotypes at the LG16 QTL could not be adequately characterized due to variation between years combined with effects of this QTL being of relatively smaller size and being most evident in individuals that carry two copies of the deleterious haplotype at the LG2 QTL. These results suggest that limiting homozygosity of the deleterious haplotype at the LG2 QTL through marker-assisted breeding would be a valid strategy to limit soft scald and soggy breakdown incidences in apple seedling populations.

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QTLs detected for individual sugars and soluble solids content in apple

Cited by 84 publications

References 66 publications

QTL mapping of pomological traits in peach and related species breeding germplasm

QTL mapping of pomological traits in peach and related species breeding germplasm

Annual variation in sensory characteristics of seventeen apple cultivars

Two QTL characterized for soft scald and soggy breakdown in apple (Malus × domestica) through pedigree-based analysis of a large population of interconnected families

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