scholarly journals Evaluasi Metode Seleksi Populasi F3 Tanaman Kedelai Berdasarkan Heritabilitas dan Kemajuan Seleksi

2021 ◽  
Vol 4 (3) ◽  
pp. 370-378
Author(s):  
Meriaty Meriaty ◽  
Arvita Netti Sihaloho ◽  
Tioner Purba ◽  
Marulam Simarmata
Keyword(s):  
Single Seed Descent ◽  
Single Seed

Dalam upaya mendapatkan varietas unggul dibutuhkan metode seleksi yang tepat. Penelitian ini bertujuan untuk mendapatkan metode seleksi yang sesuai pada populasi F3. Penelitian dilaksanakan mulai Oktober sampai Desember 2020 di desa Raya Usang Kecamatan Dolok Masagal, kabupaten Simalungun. Penelitian menggunakan Rancangan Augmented. Setiap individu tanaman ditanam dalam baris sesuai metode seleksi (single seed descent, bulk dan pedigree). Tetua ditanam sebanyak tiga ulangan. Jarak tanam yang digunakan 20 x 30 cm. Karakter yang diamati adalah tinggi tanaman, umur berbunga, jumlah cabang, jumlah polong, bobot biji pertanaman dan bobot 100 biji. Data yang diamati untuk setiap individu tanaman dilakukan untuk mencari ragam genetik, kemajuan genetik harapan (KGH) dan nilai duga heritabilitas arti luas (h2). Hasil penelitian menunjukkan bahwa metode seleksi single seed descent (SSD) menghasilkan nilai heritabilitas tinggi untuk karakter jumlah cabang dan bobot 100 biji sedangkan metode seleksi pedigree dan bulk menghasilkan nilai heritabilitas tinggi untuk karakter jumlah polong pertanaman dan bobot 100 biji. Metode seleksi SSD dan pedigree menghasilkan nilai kemajuan genetik harapan tinggi hanya untuk karakter jumlah polong pertanaman, sedangkan metode seleksi bulk menghasilkan  nilai kemajuan genetik harapan tinggi untuk karakter jumlah cabang dan jumlah polong pertanaman. Metode seleksi bulk merupakan metode seleksi terbaik pada generasi awal (F3).

Variability in Soybean Progenies Developed by Single Seed Descent at Two Plant Populations 1

Crop Science ◽  
1978 ◽  
Vol 18 (3) ◽  
pp. 359-362 ◽  
Author(s):  
R. J. Martin ◽  
J. R. Wilcox ◽  
F. A. Laviolette
Keyword(s):  
Single Seed Descent ◽  
Plant Populations ◽  
Single Seed

scholarly journals Towards Development, Maintenance, and Standardized Phenotypic Characterization of Single‐Seed‐Descent Genetic Resources for Lupins

2021 ◽  
Vol 1 (7) ◽  
Author(s):  
Magdalena Kroc ◽  
Magdalena Tomaszewska ◽  
Katarzyna Czepiel ◽  
Elena Bitocchi ◽  
Markus Oppermann ◽  
...  
Keyword(s):  
Genetic Resources ◽  
Phenotypic Characterization ◽  
Single Seed Descent ◽  
Single Seed

scholarly journals Comparison of inbred lines produced by single seed descent and pedigree inbreeding

Heredity ◽  
1984 ◽  
Vol 53 (2) ◽  
pp. 299-308 ◽  
Author(s):  
J L Jinks ◽  
H S Pooni
Keyword(s):  
Inbred Lines ◽  
Single Seed Descent ◽  
Single Seed

scholarly journals Obtenção e caracterização morfoagronômica de linhagens de pimenta do tipo Jalapeño Amarelo

2017 ◽  
Vol 35 (3) ◽  
pp. 343-348 ◽  
Author(s):  
Arlysson B Ulhoa ◽  
Telma NS Pereira ◽  
Cláudia SC Ribeiro ◽  
Antonio W Moita ◽  
Francisco JB Reifschneider
Keyword(s):  
Single Seed Descent ◽  
Single Seed

RESUMO O gênero Capsicum, de grande importância mundial, ocorre tanto nos países tropicais como nos de clima temperado. De um total de 31 espécies, apenas cinco são consideradas domesticadas, as demais, semidomesticadas ou silvestres. Nos últimos anos, as pimentas passaram a ter maior demanda pelo mercado e, consequentemente, os trabalhos relacionados à caracterização, melhoramento e obtenção de novas cultivares receberam mais atenção dentro de instituições públicas de ensino e de pesquisa, assim como no setor privado. Este trabalho foi desenvolvido na Embrapa Hortaliças, com objetivo de caracterizar morfoagronomicamente linhagens de pimenta do tipo Jalapeño Amarelo, atividade essencial para o desenvolvimento de cultivares. Primeiramente foram identificadas três plantas segregantes da cultivar comercial do tipo Jalapeño Vermelho, que apresentaram frutos de coloração amarela. Com base nesse material, o trabalho foi desenvolvido em duas fases: na primeira, obtenção de linhagens homozigotas pelo método de Descendência de Uma Única Semente (do inglês Single Seed Descent); na segunda, caracterização das linhagens obtidas através de cinco descritores morfológicos de Capsicum propostos pelo IPGRI (1995) e posterior avaliação qualitativa das linhagens em campo, sendo usado o teste Scott-Knott para a análise estatística. Conclui-se que o método de melhoramento utilizado foi satisfatório, visto que, em 30 meses de trabalho, as linhagens avançaram cinco gerações (S5). A caracterização morfológica e a avaliação qualitativa permitiram identificar diferenças significativas entre as linhagens. As linhagens promissoras identificadas neste trabalho foram CNPH 25.368, CNPH 25.373, CNPH 25.374, CNPH 25.375 e CNPH 25.377.

On the selection for specific genes by single seed descent

Euphytica ◽  
1990 ◽  
Vol 51 (2) ◽  
pp. 131-140 ◽  
Author(s):  
R. C. Jansen ◽  
J. Jansen
Keyword(s):  
Single Seed Descent ◽  
Single Seed ◽  
Selection For

scholarly journals Preliminary results of in vitro culture of pea and lupin embryos for the reduction of generation cycles in single seed descent technique

2013 ◽  
Vol 82 (3) ◽  
pp. 231-236 ◽  
Author(s):  
Maria Surma ◽  
Tadeusz Adamski ◽  
Wojciech Święcicki ◽  
Paweł Barzyk ◽  
Zygmunt Kaczmarek ◽  
...  
Keyword(s):  
Root Development ◽  
Ms Medium ◽  
Ex Vitro ◽  
Single Seed Descent ◽  
Yellow Lupin ◽  
Single Seed ◽  
Temperature Regimes ◽  
Regenerated Plants ◽  
Almost All

The aim of the studies was to establish in vitro conditions for the culture of pea and lupin embryos as the first step in the development of an in vitro assisted single seed descent technique for the attainment of homozygous populations. Materials for the study included of pea, and narrow-leafed and yellow lupin cultivars. Embryos dissected from mature but still-green seeds were cultured in vitro on two modified MS media and under three temperature regimes. Shoot and root lengths of regenerated plants were measured after 7, 14 and 21 days of culture. For pea plants full-strength MS medium with 4 g l<sup>−1</sup> agar and temperature 22/ 20°C (day/night) appeared to be the most conducive to shoot and root development, whereas for lupin plants lower temperatures were more propitious: 12°C in the dark for narrow-leafed lupin and 16/ 12°C (day/night) for yellow lupin. Almost all the cultured embryos developed into plants, but not all the regenerated plants survived acclimation to ex vitro conditions.

The inheritance of stem rust resistance in Thatcher wheat

2000 ◽  
Vol 80 (1) ◽  
pp. 53-63 ◽  
Author(s):  
D. R. Knott
Keyword(s):  
Stem Rust ◽  
Rust Resistance ◽  
Triticum Aestivum L ◽  
Stem Rust Resistance ◽  
Puccinia Graminis ◽  
Single Seed Descent ◽  
Good Resistance ◽  
Canadian Prairies ◽  
Single Seed ◽  
Inheritance Of Rust Resistance

Thatcher was the predominant wheat (Triticum aestivum L.) cultivar on the Canadian prairies in the 1950s. Until race 15B (TMH) of stem rust (Puccinia graminis pers. f. sp. tritici Eriks. & Henn.) became widespread, Thatcher had good resistance to stem rust, but was susceptible to leaf rust (P. recondita f. sp. tritici Rob. ex Desm.). Although genes for stem rust resistance have been identified in Thatcher, the inheritance of its resistance has never been fully understood. The objective of this research was to attempt to elucidate the inheritance of the resistance of Thatcher and to determine why it had a reputation as a poor parent for rust resistance. Over a period of 40 yr, crosses and backcrosses to a susceptible genotype and two sets of single seed descent (SSD) lines were studied. The second set of SSD lines was tested with isolates of six races of stem rust to which Thatcher is resistant. The data showed that Thatcher is a very heterogenous cultivar with individual plants differing widely in the genes for stem rust resistance that they carry. The inheritance of rust resistance varied greatly from race to race and was often quite complex. Either complementary genes or a gene plus a suppressor appeared to condition resistance to one race. Most genes gave resistance to only one race. The presence of Sr5, which Thatcher is known to have obtained from Kanred, was confirmed. Most of its many additional genes probably came from Iumillo durum wheat. Key words: Stem rust, Thatcher wheat, single seed descent

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