Studies on the Varietal Difference of Harvest Index in Rice : Relationship between harvest index and morphological characteristics and leaf color

Japanese Journal of Crop Science

Koh-ichiro ASANUMA¹  Masanori TOYOTA¹  Jing CUI¹  Akihito KUSUTANI¹ 

关键词: Harvest index;    形態形質;    High-yielding ability;    重回帰分析;    Leaf color;    収穫指数;    Morpholgical characteristics;    水稲;    Multiple regression analysis;    多収性;    Rice;    葉色;   

DOI  :  10.1626/jcs.69.359

学科分类：农业科学（综合）

来源: Nihon Sakumotsu Gakkai / Crop Science Society of Japan

【 摘 要 】

To find useful indexes for the selection of new rice varieties having a high harvest index, the correlation of harvest index (HI) with morphological characteristics and leaf color was examined using 60 Japanese varieties (J group) and 20 high-yielding varieties bred in Asian countries (H group). In the J group, HI showed a positive correlation with leaf color (SPAD value, SV) and a negative correlation with plant length (PL) at the heading time. In the H group, HI showed a positive correlation with SV, but the correlation coefficient between HI and PL was not significant. The correlation berween HI and culm length (CL) was similar to that between HI and PL. HI showed a negative correlation with ear length (EL) in the J group, but significantly positive correlation in the H group. There was a significantly positive correlation between EL/CL and HI in the H group. A multiple regression analysis was conducted to clarify the relationship berween morphological characteristics and HI. A significant multiple correlation coefficient was obtained between HI and SV (X1), PL (X2) or EL/CL (X3). The ratio of standard partial regression coefficient of X1, X2 and X3 to HI was 54:15:31. Consequently, it is considered that these morphological characteristics are useful indexes to select varieties with a high harvest index.

【 授权许可】

Unknown