Journal of Taiwan Agricultural Research

Author:Lung-Che Chen*, Dai-Jing Liao, Shou-Horng Huang, Woei-Shyuan Jwo, Hsin-Mu Yen, Jeng-Chung Lo, and Rong-Kuen Chen

Abstract:

    This study was initiated in 2002 to developed new Japonica rice variety at the Chiayi Agricultural Experiment Branch, Taiwan Agricultural Research Institute (TARI) by hybridization using Taikeng 2 as the female parent and Chianung-yu 872065 as the male parent and subsequent testing and selection of progenies in paddy fields. Based on a series of tests, including progeny selections, preliminary yield trials, advanced yield trials, regional yield trials, panel quality test, nitrogen response, and storage trial, the F5 line Chianung-yu 941002 was selected and it was approved for registation as a new variety Tainung 84 in 2010 by the Committee of Registration for New Plant Variety of TARI. In addition to high yield potential, Tainung 84 also possed excellent grain appearance and good eating quality, low grain sprouting on-panicle and low incidence of lodging. Tainung 84 was also highly resistant to blast disease [Pyricularia grisea (Cooke) Sacc.] and moderately resistant to brown planthopper [Nilaparvata lugens (Stål)], white backed planthopper (Sogatella furcifera (Horvath)) and smaller brown planthopper [Laodelphax striatella (Fallen)], but was susceptible to bacterial leaf blight [Xanthomonas oryzae pv. oryzae (Ishiyama) Swings et al. 1990] and sheath blight [Thanatephorus cucumeris A.B. (Frank) Donk]. The growth duration of Tainung 84 was 129 days in the first crop season, and 109 days in the second crop season. In the regional yield trials, the average grain yield of Tainung 84 was 6585 kg/ha and 3340 kg/ha in the first and second crop season, respectively. An exceptional high yield of 10 to 12 t/ha for Tainung 84 was obtained in the first crop season of 2010 at the counties of Yunlin, Chiayi and Tainan. Thus, Tainung 84 is recommened for cultivation in all rice production regions in Taiwan in the first crop season and it is only suitable for cultivaton in the central and southern areas of Taiwan in the second crop season.

Key words:Japonica rice, Oryzae sativa cv. Tainung 84, Variety, Rice breeding

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