New Apricot Varieties Selected From the Tunisian Breeding Programme

Lachkar, Amel; Mlika, M.

doi:10.17660/actahortic.2006.717.39

Cited by 5 publications

(3 citation statements)

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“…Four S -alleles ( S 10 , S 24 , S 31 and S 4 ) were exclusively found in the group of cultivars from breeding programs, which could be related to the use of landraces instead of commercial cultivars in some breeding programs. Two of these S -alleles showed a clear relationship with a specific breeding program: S 24 was found in ‘Ezzine’ from INRAT (Tunisia) [ 64 ], and S 31 was found in ‘Cow-1′ and ‘Cow-2′ from INRA (France) [ 65 ]; S 4 was present in the North American cultivar ‘Harcot’ [ 49 ]. Although this cultivar has been used as a parental genotype in several breeding programs to introduce Sharka-resistance to new releases [ 29 ], the S 4 -allele has not been found in any recent releases.…”

Section: Discussionmentioning

confidence: 99%

Self-Incompatibility in Apricot: Identifying Pollination Requirements to Optimize Fruit Production

Herrera

Lora

Hormaza

et al. 2022

Plants

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In recent years, an important renewal of apricot cultivars is taking place worldwide, with the introduction of many new releases. Self-incompatible genotypes tolerant to the sharka disease caused by the plum pox virus (PPV), which can severely reduce fruit production and quality, are being used as parents in most breeding programs. As a result, the self-incompatibility trait present in most of those accessions can be transmitted to the offspring, leading to the release of new self-incompatible cultivars. This situation can considerably affect apricot management, since pollination requirements were traditionally not considered in this crop and information is lacking for many cultivars. Thus, the objective of this work was to determine the pollination requirements of a group of new apricot cultivars by molecular identification of the S-alleles through PCR amplification of RNase and SFB regions with different primer combinations. The S-genotype of 66 apricot cultivars is reported, 41 for the first time. Forty-nine cultivars were considered self-compatible and 12 self-incompatible, which were allocated in their corresponding incompatibility groups. Additionally, the available information was reviewed and added to the new results obtained, resulting in a compilation of the pollination requirements of 235 apricot cultivars. This information will allow an efficient selection of parents in apricot breeding programs, the proper design of new orchards, and the identification and solution of production problems associated with a lack of fruit set in established orchards. The diversity at the S-locus observed in the cultivars developed in breeding programs indicates a possible genetic bottleneck due to the use of a reduced number of parents.

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Section: Discussionmentioning

confidence: 99%

Self-Incompatibility in Apricot: Identifying Pollination Requirements to Optimize Fruit Production

Herrera

Lora

Hormaza

et al. 2022

Plants

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“…indicate that Algerian apricots represent an interesting source of new germplasm mainly adapted to dry conditions with a high breeding value for drought resistance and low chilling breeding programs as has been described in apricot Tunisian germplam (Lachkar and Mlika 2006;Batnini et al 2016).…”

Section: Agronomical Evaluationmentioning

confidence: 95%

“…Despite the apricot cultivars released from French and Spanish are displacing the autochthonous Algerian cultivars in each area, there are a lot of autochthonous cultivars that still have a great interest and they are cultivated in the different areas presenting interesting characteristics from the breeding point of view including low chilling requirements and high fruit quality (Lachkar and Mlika 2006;Batnini et al 2016;Santoro 2022). Knowing the germplasm is the rst step towards its conservation and is a very important objective, especially in the case of species or varieties that are in danger of being displaced by more productive ones (Bahlouli et al 2008, Atek et al 2021).…”

Section: Introductionmentioning

confidence: 99%

Disentangling apricot genetic diversity in the Algerian semiarid agrosystem: Impact of graft-propagated autochthonous and introduced cultivars in a traditional seed-propagated system

Atek,

Egea,

Nicolás-Almansa

et al. 2024

Preprint

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Despite the apricot cultivars introduced from Spain and France are displacing the autochthonous Algerian cultivars in each area, there are a lot of local cultivars that still have a great interest and they are cultivated in the orchards from the Algerian arid agrosystem. This study addresses the agronomical and molecular characterization of autochthonous (Algerian and Tunisian cultivars) and introduced (Spanish and French) graft-propagated apricot cultivars in a traditional seed-propagated system. Sixty-five apricot cultivated autochthonous and introduced accessions from the provinces of Batna (slightly arid area) and M´Sila (semiarid area) in Algeria have been evaluated. These cultivated accessions included autochthonous Algerian cultivars (graft and seed propagated) selected over the years for its adaptation to warm Mediterranean climate and Spanish and French introduced cultivars (graft propagated). In these materials and agronomical evaluation of phenological (budburst, flowering and ripening date), pomological (fruit weight and yield per tree) and fruit quality (firmness and acidity) traits were performed together with a molecular characterization of the genetic diversity using SSR marks. Results showed the great diversity at agronomical and molecular level of this Algerian apricot germplasm. The seed-propagated autochthonous cultivars showed a lower yield per tree and fruit weight. Seed-propagated autochthonous also showed a longer fruit development and ripening cycle in comparison with the grafted cultivars with a later ripening date. Regarding fruit quality seed-propagated autochthonous cultivars present low firmness and high acidity compared with the rest. Results also showed the effectiveness of SSRs by the correct identification, detecting some synonymies and suggesting the origin of some autochthonous cultivars. These results will provide more in-depth information to develop a strategy for in-situ conservation of cultivars and to reduce gene flow from introduced material to ancient orchards. These materials would be interesting to modify some quality traits such as the acidity or firmness and drought resistance in apricot breeding programs.

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Evaluation of the Algerian Apricot Phenotypic and Genetic Diversity: Impact of Graft-Propagated Autochthonous and Introduced Cultivars in a Traditional Seed-Propagated System

Atek,

Egea,

Bahlouli

et al. 2024

Agric Res

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Despite the apricot cultivars introduced from Spain and France are displacing the autochthonous Algerian cultivars in each area, there are a lot of local cultivars that still have a great interest and they are cultivated in the orchards from the Algerian arid agrosystem. This study addresses the phenotypical and molecular characterization of autochthonous (Algerian and Tunisian cultivars) and introduced (Spanish and French) graft-propagated apricot cultivars in a traditional seed-propagated system. Sixty-five apricot cultivated autochthonous and introduced accessions from the provinces of Batna (slightly arid area) and M’Sila (semi-arid area) in Algeria have been evaluated. These cultivated accessions included autochthonous Algerian cultivars (graft and seed propagated) selected over the years for its adaptation to warm Mediterranean climate and Spanish and French introduced cultivars (graft propagated). In these materials and agronomical evaluation of phenological (budburst, flowering and ripening date), pomological (fruit weight and yield per tree) and fruit quality (firmness and acidity), traits were performed together with a molecular characterization of the genetic diversity using simple sequence repeat (SSR) marks. Results showed the great diversity at agronomical and molecular level of this Algerian apricot germplasm. The seed-propagated autochthonous cultivars showed a lower yield per tree and fruit weight. Seed-propagated autochthonous also showed a longer fruit development and ripening cycle in comparison with the grafted cultivars with a later ripening date. Regarding fruit quality, seed-propagated autochthonous cultivars present low firmness and high acidity compared with the rest. Results also showed the effectiveness of the SSR markers by the correct identification, detecting some synonymies and suggesting the origin of some autochthonous cultivars. These results will provide more in-depth information to develop a strategy for in situ conservation of cultivars and to reduce gene flow from introduced material to ancient orchards. These materials would be interesting to modify some quality traits such as the acidity or firmness and drought resistance in apricot breeding programs.

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New Apricot Varieties Selected From the Tunisian Breeding Programme

Cited by 5 publications

References 0 publications

Self-Incompatibility in Apricot: Identifying Pollination Requirements to Optimize Fruit Production

Self-Incompatibility in Apricot: Identifying Pollination Requirements to Optimize Fruit Production

Disentangling apricot genetic diversity in the Algerian semiarid agrosystem: Impact of graft-propagated autochthonous and introduced cultivars in a traditional seed-propagated system

Evaluation of the Algerian Apricot Phenotypic and Genetic Diversity: Impact of Graft-Propagated Autochthonous and Introduced Cultivars in a Traditional Seed-Propagated System

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