การศึกษาสาเหตุการเกิดข้าวแดงปนในเมล็ดพันธุ์ข้าวขึ้นน้ำ

Abstract

Causes of red rice occurrence in the floating rice variety Plai Ngahm Prachinburi were investigated on the basis of 3 hypotheses i.e. inheritance,cross-pollination and spontaneous mutation. Results of 3-years studies(1996-1998) at Prachinburi Rice Research Center indicated that the red pericarp in rice seed was a dominant character. The indidence of cross-pollination between white rice and red rice was not appeared. Spontaneous mutation showed significant role on red rice occurrence which was found in the third year of studies. Furthermore, seed were affected into various characters i.e. awn, unfilled, long with apiculi, slender, big and short, small and short and blod. Red rice seed was initially found in the last three characters.