Mohammad Chozin*, Sumardi Sumardi
1Faculty of Agriculture, University of Bengkulu, Jl. WR Supratman, Kandang Limun, City of Bengkulu, Bengkulu Province, 38126, Indonesia
Rice improvement program for swampland areas is mainly addressed to develop high yielding varieties with the desirable agronomic characteristics along with the improved adaptability to all growth limiting factors inherent in the ecosystem. This study was implemented to evaluate the growth and yield performances of 10 rice F3 populations generated from the crosses involving Bengkulu swamp rice landraces (Hanafi Putih, Batubara, Harum Curup, Tigo-tigo, and Lubuk Durian) and the cultivated varieties (Diah Suci, Bestari, and Sidenuk) on a swampland. The experiment was laid out on a shallow inland swamp with stagnant inundation up to 50 cm depth during the plant growth period. Data were collected for plant height, tiller number, number of productive tillers clump-1, heading date, maturity date, panicle length, number of grain panicle-1, 100-grain weight, and grain yield clump-1. High variability among the populations was observed for most of the traits and readily explored for the development of rice varieties well adapted to swampland. The principal component analysis showed that the populations were distinguishable on the basis of the observed traits. The magnitude of broad sense heritability and genetic advance estimates denoted that simple phenotypic selection should be sufficient for gaining genetic improvement for the majority of the traits, excluding panicle length.
Keywords: Genetic advance, Heritability, Inland swamp, Local rice varieties, Principal component