Kendali Genetik Stay Greenness dan Hasil serta Identifikasi Segregan Transgresif pada Empat Populasi F2 Sorgum
| Main Authors: | Munarti, Wirnas, Desta, Trikoesoemaningtyas, Muhamad Syukur, Sobir, Didy Sopandie |
|---|---|
| Format: | Article info application/pdf eJournal |
| Bahasa: | eng |
| Terbitan: |
Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia
, 2022
|
| Online Access: |
http://journal.ipb.ac.id/index.php/jurnalagronomi/article/view/39067 http://journal.ipb.ac.id/index.php/jurnalagronomi/article/view/39067/23370 |
Daftar Isi:
- Stay greenness in sorghum is related to the ability to maintain green leaves and photosynthesis under stress conditions. This study aimed to obtain information on the genetic control of agronomic characters, stay greenness, and the identification of transgressive segregants of four sorghum F2 populations. The research was carried out from February to May 2020 at the experimental field of IPB University (250 m asl), Bogor, West Java. The genetic materials used were the population of Numbu x Samurai 2, Kawali x Pahat, Kawali x B69, Super 2 x PI-150-20-A with their parents. The results showed that the character of seed weight per plant was controlled by many additive genes only in the Numbu x Samurai 2 and Kawali x Pahat populations, while stay greenness in all populations was controlled by many additive genes. All observed characters had broad-sense heritability values in the medium to high category. There were 18 individuals in the Kawali x B69 and Super 2 x PI-150-20-A crosses suspected to be transgressive segregants based on the character of seed weight per plant and stay greenness. The segregants would be generated through the pedigree method. Keywords: additive, gene action, genetic variation, transgressive index
- 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