The inheritance of amylose content in rice (Oryza sativa L.)
1989
Tirtowirjono, S. (Balai Penelitian Tanaman Pangan Bogor (Indonesia)) | Soemartono | Nasrullah (Universitas Gadjah Mada, Yogyakarta (Indonesia). Fakultas Pasca Sarjana)
Five rice varieties consisting of two locals Pulureni and Padimuta, and three improved varieties IR42, Semeru and Kelara were used for this study. The local varieties served as the female parents, and each was crossed with all improved varieties. Seventeen entries consisting of the six F1 hybrids and the corresponding F2 populations, and the five parents were planted in a Randomized Block Design with three replications. In each experimental plot one parent population was planted together with 20 plants of F1 and 100 plants of F2. Harvest was done for each individual plant, and the amylose content was determined using iodocalorimetry method. The results indicated that high amylose content was partial dominance to low and medium amylose content. All crossed showed 13:3 ratio, indicating that the trait is controlled by two dominant genes, with one gene when dominant epistatic to the second and the other gene when homozigous recessive is epistatic to the first. The broad sense of heritability value in the amylose content was high, suggesting that the amylose content was considerably determined by the genetic factor
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