AKSI GEN DAN HERITABILITAS KANDUNGAN ANTOSIANIN BERAS MERAH PADA HASIL PERSILANGAN GALUR HARAPAN PADI BERAS MERAH TOLERAN KEKERINGAN X KALA ISI TOLO GENE ACTIONS AND HERITABILITY OF ANTOCIANIN CONTENT OF RED RICE IN PROGENY OF POTENTIAL LINE RED RICE DROUGHT TOLERANT X ISI TOLO

Abstract

ABSTRAK

Percobaan lapangan dilaksanakan di Karang Bayan Lingsar Lombok Barat. Analisis kandungan antosianin beras  dilakukan di laboratorium  Pengujian Mutu dan Keamanan Pangan  Fakultas Teknologi Pertanian Universitas Brawijaya Malang. Penanaman  dilakukan  dengan jarak tanam 25 x 25 cm  tanpa rancangan. Populasi P1, P2 ditanam sebanyak 50 tanaman, F1, F1BC.1.1, F1BC.1.2 sebanyak 25 tanaman dan F2 sebanyak 250 tanaman. Tujuan penelitian adalah untuk untuk   mengetahui  bagaimana aksi gen dan heritabilitas  dari kandungan antosianin beras merah  yang digunakan sebagai dasar  penentuan metode seleks dalam upaya peningkatan kandungan antosianin beras pada padi beras merah  toleran kekeringan. Hasil penelitian menunjukkan  bahwa 1). Pada populasi F1 hasil persilangan  galur harapan padi beras merah  P3-S11-8  x Kala Isi Tolo dan   hasil persilangan  galur harapan padi beras merah P19-S28-14  x Kala Isi Tolo aksi gen kandungan antosianin beras  bersifat dominan tidak sempurna. 2). Kandungan antosiann beras merah di kendalikan oleh gen tunggal (simpelgenik)  dengan tindak gen  dominan lengkap pada kandungan antosianin tinggi. 3).  Persilangan  galur harapan padi beras merah  P3-S11-8  x Kala Isi Tolo dan  persilangan  galur harapan padi beras merah P19-S28-14  x Kala Isi Tolo  memiliki heritabilitas tinggi  terhadap kandungan antosianin beras.

Abstract

            A field experiment was conducted in Karang Bayan  Lingsar, West Lombok from July until October 2009. Plants were grown with spacing of 25 x 25 cm. Analysis of antocianin content  conducted in  testing laboratory of food quality and food safety  Agriculture Technology Faculty Brawijaya University. P1 and P2 were planted in 50 plants each; F1, F1BC1.1.; F1BC1.2 were planted in 25 plants each, and F2 were planted in 250 plants. The objectives of the study were to estimate number, gene mode action  and heritability of antocyanin content to be used for selection method determination. Resulted indicated that: 1. Gene action of F1 population resulted from crossing between expected line of red rice P3-S11-8 x Kala Isi Tolo  and P19-S28-14 X Kala Isi Tolo were incomplete dominance. 2. Antocianin content of red rice was controlled by  singlet gene and gene  action of complete dominance on high antocianin content. 3. Antioxidant content of F1 population resulted from crossing between expected line of red rice P3-S11-8 x Kala Isi Tolo was high heritable.