Phenological and pomological properties of promising walnut (Juglans regia L.) genotypes from selected native population in Amasya Province

Karadağ, Hakan

doi:10.5897/ajb11.653

Cited by 4 publications

(2 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Weight (WEN), length (LN), width (WIN), thickness (TN), and fruit roundness index (IR) of the tested walnut genotypes varied from 8.43 g (CT1)-13.84 g (BP48), from 33.51 mm (MK1)-50.08 mm (PL1), from 27.12 mm (BP13)-36.38 mm (AN31), from 27.38 mm (BP14)-36.89 mm (BP36), and 0.63 (BP22)-0.93 (MK1). The fruit weight of common walnut genotypes from populations from different parts of Turkey varied within wide limits as determined by Kirca et al [63] in the Trabzon region, from 10.20 to 12.40 g, Kilicoglu and Akca [60] in Turhal and Zile, from 8.16 to 14.72 g, Polat et al [64] in the Bitlis province from 10.42 to 14.25 g, Keles et al [14] in the middle Black Sea region from 8.93 to 13.82 g and Karadag and Akca [65] in Amasya Province in inner Anatolia from 7.46 to 15.21 g. According to Miletić et al [33], genotypes of the common walnut from the natural population in the Timok region in Serbia had a fruit weight in the range of 9.3-13.3 g, and from the Oltenia region in Romania, according to Cosmulescu and Botu [39] 6.8−18.4 g. In these populations, the presence of fruits of different weights vary greatly. It can be noticed that in relation to the results presented in this paper, trees with fruits of smaller and larger weight are presented, which indicates the peculiarity of each population and high variability in the wider regions of growth of the common walnut.…”

Section: Fruit and Kernel Propertiesmentioning

confidence: 99%

Fruit Quality Properties of Walnut (Juglans regia L.) Genetic Resources in Montenegro

et al. 2020

View full text Add to dashboard Cite

Centuries-old generative reproduction, relatively favourable agro-ecological conditions, natural selection, and anthropogenic roles have significantly influenced the formation of a rich, heterogeneous population of common walnuts in Montenegro. This variability can be exploited by applying a positive selection of genotypes that would have good ecological adaptability and high economic value and that would not lag behind walnut varieties originating from other countries. The paper presents the results of studying 20 selected walnut genotypes from the continental part of Montenegro in a three-year period. Šeinovo variety and the Rasna selection were used as standard. The most important biological and pomological properties were investigated based on the international walnut descriptor. The basic criteria on which the selection approach was based were: late vegetation initiation, earlier date of end of vegetation, well kernel ratio, ease of kernel removal from the shell, shell texture that should be less rough, protecting the kernel, tasty kernel, light coloured kernel, and good chemical composition of the kernel. Genotypes had fruit weight between 8.43 and 13.84 g, kernel weight between 4.20 and 6.54 g, kernel ratio between 39.20 and 52.25%, oil content between 62.04 and 67.23%, and protein content between 13.91 and 19.04%. Most of the selected genotypes have the late time of leaf bud burst, and from that point of view, the BP44 and BP42 genotypes that the leafing on May 5 and 6 are especially interesting, due to avoidance of late frost. The walnut is adapted to the existing agro-ecological conditions over a long period of successful growth in this region, and most genotypes finish their vegetation earlier and are prepared to enter the period of winter dormancy. Genotypes BP09 and AN29 with their properties surpass the worldwide recognized Šeinovo, and in this region, highly valued selection Rasna. BP48 and BP50 genotypes also deserve attention due to the quality of the fruit.

show abstract

Section: Fruit and Kernel Propertiesmentioning

confidence: 99%

Fruit Quality Properties of Walnut (Juglans regia L.) Genetic Resources in Montenegro

et al. 2020

View full text Add to dashboard Cite

show abstract

“…Because of the open pollination, Turkish walnut populations have high genetic variability consisting of millions of natural hybrids grown on their own roots, which are important sources of genetic diversity for J. regia (Akça, 2016). This genetic variation in the native walnut populations presents many opportunities for walnut breeding (Karadağ and Akça, 2011). Thus, studies of phenological and morphological traits in natural walnut populations have remained for some time, while morphological characteristics often do not indicate clear relationships between genotypes, as the results can be affected by changing environmental conditions (Kumar, 1999).…”

Section: Introductionmentioning

confidence: 99%

Morphometric Traits and iPBS Based Molecular Characterizations of Walnut (Juglans regia L.) Genotypes

Başak

Özer

Muradoğlu

2021

Preprint

View full text Add to dashboard Cite

In this study, walnut genotypes that selected during two growing seasons among thousands of seedlings were analyzed in terms of detailed morphometric, phenological, and chemical traits. A multivariate analysis was conducted with valuable traits for breeding and selection such as morphometric traits, chemical composition, and phenological characteristics. Also, genotypes were characterized by a retrotransposon-based iPBS marker system. The correlation analysis showed significant positive and negative correlations between agro-morphological characters. The principal component analysis explained 71.44% of the total variance into five main components. Principal component and hierarchical cluster analysis divided genotypes into three groups, whose subgroups were identified based on both agro-morphological characters and iPBS marker systems. A high level of polymorphism ratio was observed for tested markers. Mantel’s test demonstrated relatively low correlations between molecular and morphological treats (r=0.04). The genetic similarities among all individuals ranged from 0.39 (between 018 and 015 or 045 genotypes) to 0.98 (between 090 and 094 genotypes) with a mean similarity of 0.67. Remarkable phenotypic and molecular variations were observed among the genotypes. The features of some investigated genotypes were above the acceptable thresholds for walnut selection in breeding programs and our study indicated that iPBS markers can be beneficial in walnut breeding programs, allowing the evaluation of the genetic relationship between genotypes, helping to differentiate and select the best genotypes to improve agronomic properties.

show abstract

Comprehensive approach to replenishing the English walnut gene pool through the study of local seed populations in Krasnodar Region

Suprun,

Al-Nakib,

Tokmakov

2023

Sadovodstvo i vinogradarstvo

View full text Add to dashboard Cite

promising genotypes in the areas where this species grows. The identification of the valuable breeding forms of English walnut among local seed populations facilitates the solution of breeding problems and replenishes the collections of genetic resources with valuable specimens. In this work, we aim to assess the prospects of using new forms to solve breeding problems by means of phenotypic evaluation and molecular genetic analysis. The search for promising forms was carried out in 2022–2023 on the territory of settlements in the different districts of Krasnodar Krai. Economically valuable traits were recorded according to the “Program and Procedure for the Studying the Varieties of Fruit, Berry, and Nut Crops.” In order to assess the level of genetic diversity in the sample of new, promising forms of English walnut, SSR genotyping was carried out using seven microsatellite DNA markers: WGA001, WGA376, WGA069, WGA276, WGA009, WGA202, WGA089. The heterogeneous group of varieties and elite breeding forms of the North Caucasus Federal Scientific Center of Horticulture, Viticulture, and Winemaking, representing the overall diversity of the collection, was also included in the studied sample. The comparison of the polymorphism level in the studied specimens for both individual markers and the entire sample of markers suggests a relatively high heterogeneity of the new, promising forms included in the study. The use of UPGMA, PCoA, and analysis in STRUCTURE software allowed genetic relationships to be established between the new, promising forms and specimens from the genetic collection of the North Caucasus Federal Scientific Center of Horticulture, Viticulture, and Winemaking. The new forms were found not to form a separate cluster and to generally have an intermediate position between the three genotype groups in the gene pool collection. For the new forms, the effect of the Central Asian geneplasm was established, which determines the presence of several valuable breeding traits. Given the data on the genetic diversity of new, promising forms of English walnut relative to the genetically contrasting sample of breeding forms from the collection of the North Caucasus Federal Scientific Center of Horticulture, Viticulture, and Winemaking, it is reasonable to involve new forms in breeding in order to enrich the local English walnut gene pool.

show abstract

Phenological and pomological properties of promising walnut (Juglans regia L.) genotypes from selected native population in Amasya Province

Cited by 4 publications

References 7 publications

Fruit Quality Properties of Walnut (Juglans regia L.) Genetic Resources in Montenegro

Fruit Quality Properties of Walnut (Juglans regia L.) Genetic Resources in Montenegro

Morphometric Traits and iPBS Based Molecular Characterizations of Walnut (Juglans regia L.) Genotypes

Comprehensive approach to replenishing the English walnut gene pool through the study of local seed populations in Krasnodar Region

Contact Info

Product

Resources

About