Plant-type Characteristics in Different Yield Early Japonica Rice Varieties in Cold Region
Received date: 2022-09-17
Online published: 2023-03-14
The objective of the study was to determine the plant-type characteristics of super high yielding early japonica rice. In this study, panicle traits, leaf traits, and culm traits of plant were investigated using 48 rice cultivars and advanced lines from Heilongjiang Province at grain yield levels of 700-800 kg/667 m2, 600-700 kg/667 m2, 500-600 kg/667 m2, and 400-500 kg/667 m2. The results showed that the plant-type characteristics of super high yielding early japonica rice were as follows: higher spike weight and density of panicle, wider flag leaf, second leaf from top, third leaf from top and fourth leaf from top with great basic angle and dropping angle, second leaf length from top﹥ third leaf length from top﹥fourth leaf length from top﹥flag leaf length, higher plant height in certain extent, and shorter top fourth internode. The correlation analysis results showed that yield was significantly positively correlated with spike weight, density of panicle, width of flag leaf and second leaf from top, third leaf length and width from top, and fourth leaf length and width from top, positively correlated with culm length, and plant height at heading stage and dough grain stage.
WANG Shiqiang, HE Dengmei, ZHAO Haihong, YANG Shanwei, YI Yuzhuo, FU Yongming, ZHENG Shusheng, DING Xiwu, HE Qing, ZHENG Kaiwen, DU Tingting, GU Tianyue, TANG Xinran, WANG Yang, PAN Guojun . Plant-type Characteristics in Different Yield Early Japonica Rice Varieties in Cold Region[J]. China Rice, 2023 , 29(2) : 71 -75 . DOI: 10.3969/j.issn.1006-8082.2023.02.014
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