scholarly journals Morphological diversity of Zacatecas Guajillo chile landraces is broad and is given mainly by fruit traits

2019 ◽  
pp. 440
Author(s):  
Yolanda del Rocio Moreno-Ramírez, Amalio Santacruz-Varela ◽  
Pedro A. López, Higinio López-Sánchez ◽  
L. Córdova-Téllez, V. A. González-Hernández, T. Corona-Torres ◽  
Ricardo López- Ortega
Keyword(s):  
Phenotypic Diversity ◽  
Morphological Diversity ◽  
Fruit Shape ◽  
Local Economy ◽  
Fruit Traits ◽  
Breeding Programs ◽  
Morphological Heterogeneity ◽  
Selection Of Variables ◽  
Seed Characteristics ◽  
Selection Of

Guajillo (Capsicum annuum L.) is one of the five more important chile types used as food in Mexico and the most important to local economy in Zacatecas, whose production is supplied mainly by native populations. In spite of this, not much is known about the morphological diversity of Guajillo landraces of Zacatecas. Here, we describe and quantify their morphological variation in order to establish breeding programs and to preserve the phenotypic diversity. Thirty-two plant, flower, fruit, seed and phenological traits were assessed in 96 Guajillo chile landraces and four improved varities of Guajillo used as controls, grown during the 2015 agricultural cycle in Zacatecas, Mexico. The selection of variables was made based on the analysis of variance and multivariate analysis that were applied to the selected variables to estimate the morphological diversity. A wide variation of plant, fruit and seed characteristics was identified. This morphological heterogeneity is attributed mainly to fruit traits such as: size, weight, shape, color, transverse wrinkling of the fruit, shape of the peduncle and the number of fruits produced. This wide morphological diversity can potentially be utilized in the genetic improvement of Guajillo chile.

scholarly journals Combining Ability and Molecular Marker Approach Identified Genetic Resources to Improve Agronomic Performance in Coffea arabica Breeding

2021 ◽  
Vol 5 ◽  
Author(s):  
Alexsandra Correia Medeiros ◽  
Eveline Teixeira Caixeta ◽  
Antonio Carlos Baião de Oliveira ◽  
Tiago Vieira Sousa ◽  
Vinícius de Moura Stock ◽  
...  
Keyword(s):  
Combining Ability ◽  
Coffea Arabica ◽  
Agronomic Traits ◽  
Phenotypic Diversity ◽  
Diallel Analysis ◽  
Molecular Data ◽  
Joint Analysis ◽  
Breeding Programs ◽  
Parent Selection ◽  
Selection Of

Plant breeding aims to develop cultivars with good agronomic traits through gene recombination and elite genotype selection. To support Coffea arabica breeding programs and assist parent selection, molecular characterization, genetic diversity (GD) analyses, and circulating diallel studies were strategically integrated to develop new cultivars. Molecular markers were used to assess the GD of 76 candidate parents and verify the crossing of potential F1 hybrids. Based on the complementary agronomic traits and genetic distance, eight elite parents were selected for circulating diallel analysis. The parents and 12 hybrids were evaluated based on 10 morpho-agronomic traits. For each trait, the effects of general and specific combining abilities, as well as the averages of the parents, hybrids, and predicted hybrids, were estimated. Crosses that maximize the genetic gains for the main agronomic traits of C. arabica were identified. Joint analysis of phenotypic and molecular data was used to estimate the correlation between molecular GD, phenotypic diversity (PD), phenotypic mean, and combining ability. The selection of parents that optimize the allele combination for the important traits of C. arabica is discussed in detail.

Multivariate Diversity Analysis of Quantitative Traits of Mung Bean [Vigna radiata (L.) Wilczek] Genotypes

2021 ◽  
Author(s):  
Tekle Yoseph ◽  
Firew Mekbib ◽  
Berhanu Amsalu ◽  
Zerihun Tadele
Keyword(s):  
Mung Bean ◽  
Quantitative Traits ◽  
Agricultural Research ◽  
Crop Improvement ◽  
Morphological Diversity ◽  
Breeding Programs ◽  
Cropping Season ◽  
Cluster Distance ◽  
Almost All ◽  
Selection Of

Abstract Mung bean is an important pulse crop grown by poor farmers in marginal and drought-prone areas of Ethiopia. Information on the extent of genetic divergence in mung bean is vital to identify diverse genotypes for crop improvement and the efficient utilization of the existing genetic resources. Therefore, the objectives of the study were to assess the extent and pattern of morphological diversity among the mung bean genotypes and to identify the traits contributing to the genetic diversity using multivariate analyses. The experiment was conducted using 60 mung bean genotypes at Jinka Agricultural Research Center during the 2018 cropping season. The first seven principal components explained 80.1% of the total variation. Almost all the studied traits were important contributors to the divergence. The cluster analysis based on quantitative traits revealed four distinct groups. The highest inter-cluster distance was recorded between cluster I and cluster IV (D 2  = 43.16 units). The minimum inter-cluster distance was noted between cluster III and cluster IV (D2 = 12.16 units). The maximum and minimum intra-cluster distances D2 were recorded within cluster I (D2 = 6.49 units) and cluster III (D2 = 3.53 units), respectively). The range of intra and inter-cluster distance was 3.53 to 6.49 units and 12.16 to 43.16 units, respectively. Hence, the high genetic distance exhibited within and among clusters has to be exploited through the crossing and selection of the most divergent parents for future mung bean breeding programs.

scholarly journals Morphological Diversity, Genetic Characterization, and Phytochemical Assessment of the Cypriot Tomato Germplasm

Plants ◽  
2021 ◽  
Vol 10 (8) ◽  
pp. 1698
Author(s):  
Filio Athinodorou ◽  
Petros Foukas ◽  
Georgios Tsaniklidis ◽  
Anastasios Kotsiras ◽  
Antonios Chrysargyris ◽  
...  
Keyword(s):  
Nutritional Value ◽  
Morphological Diversity ◽  
Titratable Acidity ◽  
Fruit Shape ◽  
Phenotypic Traits ◽  
Vegetable Crops ◽  
Solanum Lycopersicum L ◽  
Landrace Accessions ◽  
Β Carotene ◽  
Selection Of

Tomato (Solanum lycopersicum L.) is considered one of the most valuable and versatile vegetable crops globally and also serves as a significant model species for fruit developmental biology. Despite its significance, a severe genetic bottleneck and intense selection of genotypes with specific qualitative traits have resulted in the prevalence of a restricted number of (geno)types, also causing a lack of diversity across widespread cultivated types. As a result, the re-emergence of landraces as well as traditional and heirloom varieties is largely acknowledged as a countermeasure to restore phenotypic, phytochemical and genetic diversity while enriching the aroma/taste tomato palette. On those grounds, the Cypriot tomato germplasm was assessed and characterized. Ten landrace accessions were evaluated under greenhouse conditions and data were collected for 24 IPGRI discrete phenotypic traits. Grouping of accessions largely reflected the fruit shape and size; four different fruit types were recorded across accessions (flattened, heart-shaped, rounded and highly rounded). Moreover, a single run panel consisting of ten SSRs was developed and applied in order to genetically characterize 190 Cypriot genotypes and foreign heirloom varieties. Based on genetic indexes it was established that tomato landraces have a rather low level of heterogeneity and genetic variation. Finally, mineral and phytochemical analyses were conducted in order to estimate biochemical attributes (total phenolics, ascorbic acid, lycopene, β-carotene, total soluble content, titratable acidity) across genotypes; thus, ascertaining that the Cypriot panel has a high nutritional value. Due to the thermo-drought adaptation and tolerance of these genotypes, the current study serves as a roadmap for future breeding efforts in order to incorporate desirable traits or develop novel tomato lines combining resilience and alimentary value.

scholarly journals Genetic Characterization of Tunisian Lime Genotypes Using Pomological Traits

2020 ◽  
Vol 28 (1) ◽  
pp. 65-76
Author(s):  
Olfa Saddoud Debbabi ◽  
Selma Ben Abdelaali ◽  
Rym Bouhlal ◽  
Sabrine Zneidi ◽  
Nasr Ben Abdelaali ◽  
...  
Keyword(s):  
Quantitative Traits ◽  
Phenotypic Diversity ◽  
Diversity Index ◽  
Principal Component ◽  
Fruit Shape ◽  
Ex Situ ◽  
Breeding Programs ◽  
Wiener Diversity Index ◽  
On Farm

AbstractCitrus genus includes a wide number of species that have been long cultivated and well adapted in Tunisia. It is represented by small number of plantations and considered as underutilized in Tunisia. Our goal was to genetically characterize Tunisian lime genotypes to obtain data useful for gene conservation and breeding purposes. The survey of genotypes was conducted in the Cap Bon region, where citrus cultivation is the most spread. Sixteen quantitative and 19 qualitative parameters were evaluated. The observed accessions belonged to three different species: Citrus limetta, Citrus latifolia (limes Byrsa), and Citrus limettioides (limes of Palestine) according to Tanaka classification. Principal component analysis confirmed these classifications. Four-cell analysis (FCA) was used to determine the most threatened genotypes. Quantitative traits were evaluated and allowed the discrimination between genotypes. Many quantitative traits of fruit and juice were highly positively and significantly correlated. Phenotypic diversity was determined using Shannon–Wiener diversity index (H’). The highest value of diversity index was observed for both vesicle thickness and thickness of segment walls (H’ = 0.98). Intermediate values were observed for both fruit axis (H’= 0.49) and pulp firmness (H’ = 0.43). However, fruit shape (H’ = 0.24), shape of fruit apex (H’ = 0.24), and vesicle length (H’ = 0.33) presented the lowest values of diversity index. Current findings will be useful to conserve threatened genotypes ex situ and on farm and also will guide strategic conservation on Citrus genetic resources for future breeding programs.

scholarly journals Phenotypic Diversity Assessment of Guava (Psidium guajava L.) Collection in Vietnam

2021 ◽  
Author(s):  
Dang Quang Bui ◽  
Trung Duc Tran ◽  
Ha Thi My Le ◽  
Tuyet Thi Nguyen ◽  
Yen Thi Oanh Tran
Keyword(s):  
Genetic Diversity ◽  
Phenotypic Diversity ◽  
Psidium Guajava ◽  
Fruit Traits ◽  
Improvement Program ◽  
Breeding Programs ◽  
Processing Industry ◽  
Diversity Assessment ◽  
Fruit Processing ◽  
Range Of Variation

Background: Guava (Psidium guajava L.) is an important cultivated fruit crop in Vietnam due to its commercial value for fresh consumption and especially for fruit processing industry. A large number of diverse guava accessions, both indigenous and exotic, are available in Vietnam but their characterization, which is needed to identify targeted guava accessions for breeding programs, is still limited.Methods: The phenotypic variation and relationship among 40 guava accessions collected across Vietnam were assessed employing leaf and fruit morphological and physiological characterizations.Result: Range of variation for different leaf and fruit parameters were recorded. Significant correlations between leaf and fruit traits relating to yield and fruit quality were also observed implying a possibility of their simultaneous or interchangeable use in selection. Furthermore, the dendrogram generated from agglomeration hierarchical clustering grouped the 40 guava accessions into four major clusters which are highly associated with their origins. The result indicated that existing guava accessions are an important source of genetic diversity and can be used in the guava improvement program in Vietnam.

scholarly journals Analysis of leaf phenotypic diversity of some Hevea Accessions/clones conserved at the Institute of Agricultural Research for Development (IRAD) Ekona, Cameroon

2021 ◽  
Vol 12 (2) ◽  
pp. 372-378
Author(s):  
Njukeng Jetro Nkengafac ◽  
Ndille Claurence Nkumbe
Keyword(s):  
Agricultural Research ◽  
Phenotypic Diversity ◽  
Germplasm Collection ◽  
Principal Component ◽  
Morphological Diversity ◽  
Morphological Descriptors ◽  
Breeding Programs ◽  
Diverse Groups ◽  
Component Scores

This study was carried out to estimate leaf morphological diversity of some accessions/clones from IRRDB 1981 Hevea germplasm collection conserved at IRAD Ekona, to determine the importance of leaf morphological descriptors in differentiating accessions/clones. A total of 36 clones/ accessions were characterized using 6 leaf morphological descriptors. Analysis of variance showed that there were significant differences in the leaf morphological parameters for the studied clones. The Principal Component Analysis (PCA) showed that all leaf descriptors were informative and contributed significantly to the variation. The first 2 Principal Component scores (PCs) accounted for 88% of the total variation. The cluster analysis based on significant PCs grouped all accessions and clones in to 6 main clusters at the distance of 1.5. This study permits the characterization of Hevea accessions and clones in to diverse groups using leaf morphological descriptors; hence this will be advantageous for production of diverse genotypes during breeding programs to broaden the Hevea gene pool.

scholarly journals Morphological Diversity and Bioactive Compounds in Wall Rocket (Diplotaxis erucoides (L.) DC.)

Agronomy ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 306 ◽  
Author(s):  
Carla Guijarro-Real ◽  
Jaime Prohens ◽  
Adrián Rodríguez-Burruezo ◽  
Ana Fita
Keyword(s):  
Growth Habit ◽  
Total Phenolics ◽  
Morphological Variability ◽  
Principal Component ◽  
Morphological Diversity ◽  
Breeding Programs ◽  
New Information ◽  
Diplotaxis Erucoides ◽  
Positive Correlations ◽  
Selection Of

Wall rocket is a wild vegetable with interest to become a crop. However, the information regarding morphological variability in the species is scarce, despite the interest it has received for breeding programs. In addition, evaluating the phytochemical composition can also be useful for developing materials of a high quality. In this study, forty-four populations were evaluated for selected morphoagronomic traits and contents in ascorbic acid (AA), total phenolics (TP), and nitrates (NO3−). Wall rocket plants had, on average, an intermediate growth habit and a good response to transplant. Moderate variability, mainly for size-related traits, was found, with low to moderate heritability estimates (H2 < 0.35). A Principal Component Analysis revealed that some materials may be selected for differenced traits. On the other hand, wall rocket materials had, on average, high contents in AA (53 mg 100 g−1) and TP (116 mg CAE 100 g−1) but also accumulated high levels of NO3− (891 mg 100 g−1). Significant positive correlations were found for AA and TP, which could be exploited for increasing the antioxidant activity and properties of the final product. We provide new information on the variation of wall rocket for traits of morphological and phytochemical interest, which together with other traits, such as the profile of glucosinolates, can be useful for the selection of materials in future breeding programs.

ESTIMASI NILAI HERITABILITAS BOBOT IKAN MAS VARIETAS PUNTEN DALAM PROGRAM SELEKSI INDIVIDU

2016 ◽  
Vol 11 (3) ◽  
pp. 217
Author(s):  
Estu Nugroho ◽  
Budi Setyono ◽  
Mochammad Su’eb ◽  
Tri Heru Prihadi
Keyword(s):  
Body Weight ◽  
Selection Response ◽  
Base Population ◽  
Breeding Programs ◽  
Male And Female ◽  
Body Weight Trait ◽  
Population Selection ◽  
Selection For ◽  
Weight Trait ◽  
Selection Of

Program pemuliaan ikan mas varietas Punten dilakukan dengan seleksi individu terhadap karakter bobot ikan. Pembentukan populasi dasar untuk kegiatan seleksi dilakukan dengan memijahkan secara massal induk ikan mas yang terdiri atas 20 induk betina dan 21 induk jantan yang dikoleksi dari daerah Punten, Kepanjen (delapan betina dan enam jantan), Kediri (tujuh betina dan 12 jantan), Sragen (27 betina dan 10 jantan), dan Blitar (15 betina dan 11 jantan). Larva umur 10 hari dipelihara selama empat bulan. Selanjutnya dilakukan penjarangan sebesar 50% dan benih dipelihara selama 14 bulan untuk dilakukan seleksi dengan panduan hasil sampling 250 ekor individu setiap populasi. Seleksi terhadap calon induk dilakukan saat umur 18 bulan pada populasi jantan dan betina secara terpisah dengan memilih berdasarkan 10% bobot ikan yang terbaik. Calon induk yang terseleksi kemudian dipelihara hingga matang gonad, kemudian dipilih sebanyak 150 pasang dan dipijahkan secara massal. Didapatkan respons positif dari hasil seleksi berdasarkan bobot ikan, yaitu 49,89 g atau 3,66% (populasi ikan jantan) dan 168,47 g atau 11,43% (populasi ikan betina). Nilai heritabilitas untuk bobot ikan adalah 0,238 (jantan) dan 0,505 (betina).Punten carp breeding programs were carried out by individual selection for body weight trait. The base population for selection activities were conducted by mass breeding of parent consisted of 20 female and 21 male collected from area Punten, eight female and six male (Kepanjen), seven female and 12 male (Kediri), 27 female and 10 male (Sragen), 15 female and 11 male (Blitar). Larvae 10 days old reared for four moths. Then after spacing out 50% of total harvest, the offspring reared for 14 months for selection activity based on the sampling of 250 individual each population. Selection of broodstock candidates performed since 18 months age on male and female populations separately by selecting based on 10% of fish with best body weight. Candidates selected broodstocks were then maintained until mature. In oder to produce the next generation 150 pairs were sets and held for mass spawning. The results revealed that selection response were positive, 49.89 g (3.66%) for male and 168.47 (11.43%) for female. Heritability for body weight is 0.238 (male) and 0.505 (female).

Study of tomato hybrids in summer-autumn turnover in JSC Teplichnoye, Tambov region

2020 ◽  
Author(s):  
K.A. Chupkin ◽  
◽  
V.I. Terekhova ◽  
A.V. Konstantinovich
Keyword(s):  
Fruit Shape ◽  
Vegetable Crops ◽  
Selection Of

Requirements for modern tomato hybrids are increasing both on the part of consumers and on the part of producers. Producers are interested in hybrids with an original fruit shape, color, taste and aroma. The aim of the research was the variety study of indeterminate F1 tomato hybrids of the breeding company "Gavrish" in JSC "Teplichnoe", Tambov region. The research was carried out in 2017-2018. in summer-autumn turnover in the conditions of JSC "Teplichnoye" in the Tambov region in accordance with generally accepted recommendations for research with vegetable crops in greenhouses. Based on the results of the study of tomato hybrids of the selection of the "Gavrish" company, the enterprise decided to increase the area in the summer-autumn turnover under the F1Panther hybrid.

Sign in / Sign up

Export Citation Format

Share Document