Varietal Differences and Geographical Distributions in the Growth of Mesocotyl and Internodes of Rice (0ryza sativa L.) Seedlings

Japanese Journal of Crop Science

Hajime WATANABE¹  Kiyochika HOSHIKAWA¹  Kiyoshi TAKAHASHI¹ 

关键词: Core collection;    イネ;    First internode;    コアコレクション;    Internode elongation;    節間伸長;    Mesocotyl;    第1節間;    Rice;    第3節間;    Second Internode;    第2節間;    Third internode;    中茎;   

DOI  :  10.1626/jcs.64.66

学科分类：农业科学（综合）

来源: Nihon Sakumotsu Gakkai / Crop Science Society of Japan

【 摘 要 】

The characteristics of internode elongation were investigated using 262 rice cultivars including 260 from IRRI's core collection and two recommended Japanese cultivars, Sasanishiki and Koshihikari. Sterilized brown rice grains were planted on 0.8% agar medium under aseptic condition, and incubated in a growth chamber at 30°C under total darkness for 14 days. The lengths of mesocotyl (ML), first internode (1IN), second internode (2IN), third internode (3IN) and total length of internodes (ML+1IN+2IN, TLI) were recorded. The frequency distribution of the final length of ML and 1IN was nonsymmetric whereas that of the 2IN and TLI was a nearly normal distribution. The mean length of ML, 1IN, 2IN, TLI, was 12.3±0.8 mm, 11.1±0.6 mm, 35.1±1.0 mm, 58.5±1.8 mm, respectively. Of all the cultivars, the 1IN did not elongate in 22 and the 3IN did not elongate in 88. Cultivars having longer TLI were hard to grow 3IN. The geographical distribution showed that there was wide variation in the length of the internodes of Southwest Asian cultivars : however, narrow variation was observed for East Asian cultivars. Correlation coefficients for ML vs 2IN, ML vs TLI, 1IN vs 2IN, 1IN vs TLI, 2IN vs TLI were positive and highly significant.

【 授权许可】

Unknown