Studies on the Regrowth of Rice Plant Shoots : II. On characteristics of the new effective tillers appeared after cuttings

Japanese Journal of Crop Science

Kiyochika HOSHIKAWA¹  Yusuke GOTO¹ 

关键词: Cutting;    青刈り;    Heading;    1代雑種品種;    High nodal-position tiller;    高節位分げつ;    Hybrid variety;    再生;    Regrowth;    出穂;    Rice;    水稲;    Tiller bud;    分げつ芽;   

DOI  :  10.1626/jcs.57.59

学科分类：农业科学（综合）

来源: Nihon Sakumotsu Gakkai / Crop Science Society of Japan

【 摘 要 】

In the previous paper, the effective regrowth rice shoots were classified into two types, (1) SS (surviced shoots); their young panicles were not cut off and continued to grow after cutting and attained to heading, (2) NS (new shoots) ; they had reached the stage of axillary buds by the time of cutting, and newly developed until the heading. This paper gives detailed information regarding the characteristics of the NS. Each NS has one prophyll and two or three leaves (NS[2] and NS[3]). NS[3] were found mainly in the plot L (cut at a low level:7.5 cm over the ground). The ear length, the number of primary rachis-branches and the number of grains of NS[3] were similar to those of NS[2]. The order of the leaf blade lengths was bL1 (flag leaf)>bL2 in the NS[2] and bL2>bL1>bL3 in the NS[3]. Almost all the NS were produced from the third tillers (bT3, which were wrapped by the third leaf counted downward from the flag leaf) or from the fourth tillers (bT4). Most of NS emerged two leaves before heading. Therefore, the cutting practice at the proper time in the young panicle developing stage of the rice plant may be able to induce simultaneous heading in cultivars which have genetically different heading time.

【 授权许可】

Unknown