Transgressive segregations in two pea F2 populations and their respective F2:3 families

Cazzola, Federico; Bermejo, Carolina; Cointry, Enrique

doi:10.1590/s1678-3921.pab2020.v55.01623

Cited by 13 publications

(9 citation statements)

References 17 publications

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“…However, these 𝐶𝑉 𝑒 % values did not show high heritability, with MSA showing the highest ℎ 𝑔 2 % value (80.2%). High ℎ 𝑔 2 % values indicate highly effective selection in the initial generations (Cazzola, Bermejo, & Cointry, 2020). Therefore, MSA is a promising selection trait for cultivation.…”

Section: Resultsmentioning

confidence: 99%

Genetic parameters and gains with the selection of fig tree genotypes

et al. 2022

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Fig tree (Ficus carica L., Moraceae), which originated in the Mediterranean Basin, is one of the many fruit trees grown in Brazil, with ‘Roxo-de-Valinhos’ being the exclusively used cultivar. In this context, research aimed at the improvement of this species to develop highly resistant and adaptable cultivars is paramount. Thus, the present study aimed to maintain fig accessions in an in vivo active germplasm bank (AGB) at the Faculty of Engineering of Ilha Solteira (FEIS), São Paulo State University (UNESP), as well as to characterize the agronomic traits of these accessions based on quantitative descriptors of genetic parameters and observe gains with the selection of specific genotypes to illustrate the AGB in terms of genetic variability. A total of 36 F. carica genotypes were evaluated in the field at the Teaching, Research and Extension Farm (FEPE) of the FEIS, UNESP. Qualitative traits, fruit parameters (e.g., insertion of the first fruit, fruit stalk length, fruit length, fruit diameter, and average fruit mass), and accumulated plant dry mass were measured. In addition, genetic parameters, variance components, and descriptive statistics, including genetic and environmental variances, heritability and average heritability of clones, coefficients of genotypic and environmental variation and their ratio ( ), general average, and selection gain, were evaluated. The selected fig tree accessions showed genetic variability in the assessed traits, exhibiting good heritability and achieving selection gains. For instance, the first 10 classified clones exhibited a heritability of 80.2% and achieved a selection gain of 98% for accumulated plant dry mass. Therefore, the maintenance of in vivo AGBs allows agronomic studies, offering promising results for continuing the breeding programs and preserving the genetic variability of species.

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Section: Resultsmentioning

confidence: 99%

Genetic parameters and gains with the selection of fig tree genotypes

et al. 2022

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“…Indeks transgresif keempat populasi F 2 yang diamati untuk karakter stay greenness kisarannya dari 1.4-33.1, untuk karakter bobot biji per tanaman kisarannya dari 2.8-6.0 (Tabel 5). Indeks transgresif dikategorikan rendah apabila (0.0 < IT < 5.0); sedang (5.0 ≤ IT ≤ 10.0); dan tinggi (IT > 10.0) (Cazzola et al, 2020). Indeks transgresif untuk karakter bobot biji per tanaman pada populasi Kawali x Pahat dan Kawali x B69 termasuk kategori rendah, sedangkan pada populasi Numbu x Samurai 2 termasuk kategori sedang.…”

Section: Identifikasi Segregan Transgresifunclassified

Kendali Genetik Stay Greenness dan Hasil serta Identifikasi Segregan Transgresif pada Empat Populasi F2 Sorgum

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TRIKOESOEMANINGTYAS

et al. 2022

J. Agron. Indonesia

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Karakter stay greenness pada sorgum berkaitan dengan kemampuan mempertahankan kehijauan daun dan laju fotosintesis pada kondisi cekaman. Penelitian ini bertujuan untuk memperoleh informasi kendali genetik karakter agronomi, stay greenness serta identifikasi segregan transgresif empat populasi F2 sorgum. Penelitian telah dilaksanakan bulan Februari sampai Mei 2020 di Kebun Percobaan IPB University Leuwikopo, Dramaga, Bogor, dengan ketinggian 250 m di atas permukaan laut (dpl). Bahan genetik yang digunakan adalah populasi Numbu x Samurai 2, Kawali x Pahat, Kawali x B69, Super 2 x PI-150-20-A, dan tujuh genotipe tetuanya. Setiap populasi terdiri atas 300 tanaman F2 dan masing-masing tetua sebanyak 60 tanaman. Pendugaan kendali genetik berdasarkan nilai skewness dan kurtosis. Identifikasi segregan transgresif menggunakan karakter terpilih berdasarkan nilai parameter genetik. Hasil penelitian menunjukkan bahwa karakter bobot biji per tanaman dikendalikan banyak gen aditif pada populasi Numbu x Samurai 2 dan Kawali x Pahat, sedangkan karakter stay greenness pada semua populasi dikendalikan banyak gen aditif. Semua karakter yang diamati memiliki nilai heritabilitas arti luas sedang sampai tinggi. Delapan belas individu dari persilangan Kawali x B69 dan Super 2 x PI-150-20-A diduga sebagai segregan transgresif berdasarkan karakter bobot biji per tanaman dan stay greenness. Segregan yang diperoleh digalurkan dengan menerapkan metode pedigree. Kata kunci: aksi gen, aditif, indeks transgresif, keragaman genetik

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“…The total sugar content concentration in pulp of F 1 population was skewed to the low values but some progenies had extraordinarily high TSS concentration. Therefore, improvement of Sukali Ndizi cultivars for high TSS concentration is possible by crossbreeding as the transgressive segregants in F 1 generation, suggests that they could produce superior lines (Cazzola et al, 2020). The total sugars and soluble solids of Sukali Ndizi progenies were quantitative characters controlled by many minor genes and expressed additive and nonadditive genetic effects and cross breeding was an effective way for improving Sukali Ndizi sugar content.…”

Section: Physio-chemical Variability In Crossesmentioning

confidence: 99%