Increasing Genetic Diversity for Apple Breeding: A Preliminary Report

Noiton, Dominique; Hofstee, M. E.; Alspach, P. A.; Brewer, Lester; Howard, C.

doi:10.17660/actahortic.1998.484.14

Cited by 14 publications

(16 citation statements)

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“…Water core 1-2; absent-present (S91 only); 0-9 (nil-extreme) in other sublines 1996 (Noiton et al 1999). The average size of the OP families was about 20 (similar to that proposed in the breeding strategy-Noiton and Shelbourne 1992) at each site.…”

Section: First Generationsupporting

confidence: 57%

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Development of a recurrent apple breeding programme in New Zealand: a synthesis of results, and a proposed revised breeding strategy

et al. 2009

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This paper describes an apple breeding population that has been developed in New Zealand since 1990 to broaden the genetic base for cultivar breeding. The population is now in its third generation, with recurrent selection for general combining ability being the underlying approach. During the 20 years of the programme, nearly 1,000 trees have been progeny tested. An early focus on selection within open-pollinated tests has been replaced by selection within control-pollinated tests. Genetic evaluation methods along with estimates of genetic parameters (e.g. heritability, genetic correlations, and genotype-by-environment interactions), genetic gain, and genetic diversity are summarised in this paper. The third-generation crossing programme involving nearly 350 parents is almost completed and seedlings from these crosses are in the nursery. In the revised breeding strategy, three hierarchal populations are envisioned to better integrate this broad-based population with the more commercially focused cultivar breeding programme: main breeding population (MBP), elite breeding populations (EBP) and cultivar development populations (CDP). A two-subline structure and a minimum of two crosses per parent will be implemented in the MBP. EBP will focus on developing parents for breeding goals of the CDP. Forward-selected (based on estimated breeding values) candidates from the main-and elite populations will be used as parents of the CDP. Cloning of seedlings in elite populations and also in the firststage of cultivar development, will be investigated as a tool for enhancing predictability and shortening the cycle for delivering genetic gain.

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Section: First Generationsupporting

confidence: 57%

“…Protocols for the assessment of a range of traits have previously been reported (e.g. Noiton et al 1999;Oraguzie et al 2001a, b) and a list of commonly assessed traits and their assessment criteria is shown in Table 2. Some traits (e.g.…”

Section: Selection Traitsmentioning

confidence: 99%

Development of a recurrent apple breeding programme in New Zealand: a synthesis of results, and a proposed revised breeding strategy

et al. 2009

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“…For this reason, all the collected accessions were transferred to the Experimental Station `Radmilovac` of the Faculty of Agriculture in Belgrade for further study. The main goal was to ensure the conservation of a wide range of genetic variability and progress in long-term breeding program because greater genetic diversity would be desirable for future development of innovative, market-driven cultivars (Noiton 1998).…”

Section: Resultsmentioning

confidence: 99%

“…The knowledge in local apple cultivars is rising up, so this kind of a situation can serve to diversify the apple market (Itoiz and Royo 2003;Pereira-Lorenzo et al 2007). There are numerous apple genetic resources conservation and utilization programs in different countries such as in Russia (Forsline 1993), Kazakhstan (Hokanson et al 1998), New Zealand (Noiton 1998), China (Zhi-Qin 1999), Turkey (Ercisli 2004), Romania (Gradinariu et al 2003), Spain (Pereira Lorenzo et al 2003) and Denmark (Larsen et al 2006) that are trying to establish the collections of germplasm in situ. However, these efforts have not been enough to compare the complete variability found in the world.…”

Section: Introductionmentioning

confidence: 99%

Phenotypic Diversity of Apple (Malus sp.) Germplasm in South Serbia

Mratinić

Akšić

2012

Braz. arch. biol. technol.

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“…), as well as crab apples (Malus spp. ), contributed by repositories from a number of countries (Noiton et al 1999). Sublines 92 and 93 consisted of 143 and 66 families, respectively, but as only families with fruit assessment data from all sites were included in the analyses, these numbers were reduced to 119 (nine of which were derived crab apples or wild species) and 50 (six from crab apples or wild species) for sublines 92 and 93 respectively.…”

Section: Plant Materialsmentioning

confidence: 99%

Estimation of genetic parameters of apple(Malus domestica)fruit quality from open‐pollinated families

Alspach¹,

Oraguzie

2002

New Zealand Journal of Crop and Horticultural Science

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Variance components of Julian harvest date, fruit weight, and eight sensory fruit traits (amount of over-colour, russet, firmness, crispness, juiciness, acidity, sweetness, and astringency) were estimated on two of the four initial sublines of the Apple Genetics Population in New Zealand. The sublines, both established at three sites, consisted of 119 and 50 families with sufficient fruiting trees, and had a median of c. 40 trees/family. These families were derived from open-pollinated seed from apple cultivars (Malus domestica Borkh.), as well as crab apples (Malus spp.) from a number of countries. Fruit weight was taken as the mean of six fruit, and sensory traits were scored on a 0 (no detectable presence) to 9 (full expression) scale by a pair of assessors in one laboratory. Additive and variance stabilising (AVAS) transformations were performed for scored traits before analysis. Genotype-byenvironment interaction variance was less than half that among families. Heritability estimates of harvest date and fruit weight were high (>0.70), but those of the sensory traits were, at most, moderate (russet 0.35-0.54 and firmness 0.26-0.59). Estimates from the two sublines were in broad agreement, and exclusion of the crab apple families generally made little difference to the estimates. Phenotypic and genetic correlations were similar, and mostly below 0.3 in magnitude (median magnitude 0.12).

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Increasing Genetic Diversity for Apple Breeding: A Preliminary Report

Cited by 14 publications

References 0 publications

Development of a recurrent apple breeding programme in New Zealand: a synthesis of results, and a proposed revised breeding strategy

Development of a recurrent apple breeding programme in New Zealand: a synthesis of results, and a proposed revised breeding strategy

Phenotypic Diversity of Apple (Malus sp.) Germplasm in South Serbia

Estimation of genetic parameters of apple(Malus domestica)fruit quality from open‐pollinated families

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