Comparison of Internodal Elongation between Asian Deepwater Rice and Its Wild Relatives

Japanese Journal of Crop Science

Jun INOUYE¹  Yoshio SANO¹  Makoto MAESAKO¹ 

关键词: Deepwater rice;    浮稲;    Elongation ability;    浮稲性;    Floating rice;    最低伸長節間;    Lowest elongated internode (LEI);    節間伸長性;    Wild rice;    野生イネ;   

DOI  :  10.1626/jcs.64.304

学科分类：农业科学（综合）

来源: Nihon Sakumotsu Gakkai / Crop Science Society of Japan

【 摘 要 】

Using 747 varieties of Asian deepwater rice (Oryza sativa) and 112 strains of wild rice including O.rufipogon. O, nivara, and their intermediates, the position of the lowest elongated internode (LEI) and the elongation ability under rising water conditions at a rate of 2 cm and 4 cm per day were examined. The wild rice strains were distinguishable as both erect and creeping strains at the 8th leaf stage and both types were equally frequent. When creeping seedlings were submerged in water, even the seedling with most creeping growth stood nearly erect at around five days after submerging treatment. The average LEI position was about one internode higher in the wild rice, while in the creeping wild rice it was one internode higher than in the erect type. The range of the LEI position among the wild rice strains was nearly the same with that among the deepwater rice varieties. These results show that the age at which plants begin to elongate their internodes seems to be nearly the same between the both rices. Under rising water conditions, on the contrary, elongation ability of most wild rice strains was inferior to that of deepwater rice. In wild rice strains with poor elongation ability, both length of leaf sheath and leaf blade and/or each internode length was shorter than in the deepwater rice.

【 授权许可】

Unknown