Effects of row ratio and plant spacing for enhancing hybrid rice seed production in the tropics

Bayu Pramono Wibowo; Yuni Widyastuti; R. Noviadi Prabowo; Cecep  Suparman; Satoto; Trias Sitaresmi

doi:10.24831/jai.v52i1.51380

Bayu Pramono Wibowo The National Research and Innovation (BRIN), Cibinong Science Center, Bogor 16911, INDONESIA
Yuni Widyastuti The National Research and Innovation (BRIN), Cibinong Science Center, Bogor 16911, INDONESIA
R. Noviadi Prabowo The Indonesian Center for Rice Research (ICRR), Subang 41256, INDONESIA
Cecep Suparman The National Research and Innovation (BRIN), Cibinong Science Center, Bogor 16911, INDONESIA
Satoto The Indonesian Center for Rice Research (ICRR), Subang 41256, INDONESIA
Trias Sitaresmi The National Research and Innovation (BRIN), Cibinong Science Center, Bogor 16911, INDONESIA

DOI: https://doi.org/10.24831/jai.v52i1.51380

Abstract

The seed yield production determines the success of the development of hybrid rice. Here, an effective and efficient cultivation technology for producing hybrid rice seeds is optimized through spacing and row ratio management. This study aimed to evaluate the effects of spacing and row ratio of restorer (R) : CMS (A) on F₁ hybrid rice seed production. The experiment was conducted at the Indonesian Center of Rice Research's experimental field in the dry season of 2016, using parental lines HIPA18 hybrid rice, i.e., CMS: IR79156A line and Restorer: IR53942 line. The experiment was laid out in a strip-plot design replicated three times. Two factors were studied, i.e., plant spacing between CMS lines and row ratio R by A-lines. The results indicated that the highest HIPA18 seed production was obtained from 20 cm x 20 cm spacing of CMS with row ratio 2R:14A, i.e., 3.62 tons ha^-1. Plant spacing and row ratio interactions were improved tillers number per plant of restorer and F₁ seed yields.

Keywords: A-lines; CMS; F₁ hybrid rice; R-lines