Comparative Analysis of Main Characters of New Hybrid Rice Combinations with Different Yield Levels  

不同产量水平杂交水稻新组合主要性状对比分析（英文）

作　　者：潘典进[1] 罗冬玉 罗文清 李俊丽 周家华 王军民 顿晓曦 

机构地区：[1]荆门市农业技术推广中心,湖北荆门448000 [2]荆门农业科学研究院,湖北荆门448000

出　　处：《Agricultural Science & Technology》2017年第12期2272-2275,共4页农业科学与技术（英文版）

摘　　要：The main characters and yield of 22 new indica hybrid rice combinations were analyzed in order to sort out the common characteristics in the performance of main characters of high-yielding varieties （combinations）.The results showed at the confidence level of 95%, the whole growth pedod ranged from 131.3 to 137.3 d, the effective ear number ranged from 2 495 000 to 3 179 000 ears/hm2, the plant height was in the range of 119.5-131.7 cm, the average ear length ranged from 24.6 to 27.2 cm, the spikelet number per panicle was in the range of 164.2-225.4, the seed setting percentage ranged from 69.4% to 82.3%, and the 1 000-grain weight was in the range of 26.9-31.2 g. The correlation analysis between single traits and yield of rice varieties （combinations） showed that in order to achieve high yield, the medium indica hybrid rice variety with moderate growth period, higher plant height or biological yield, larger panicle and bigger kernel should be selected. In addition, the maximum tiller number should be controlled and adjust- ed, and the spike rate should be improved to ensure sufficient effective ears in the cultivation process.对22个籼型杂交水稻新组合的主要性状和产量进行分析,以期整理出高产品种(组合)主要性状表现的共同特性。结果表明,高产品种(组合)在95%置信限下,主要性状水平为全生育期131.3~137.3 d,有效穗249.5万~317.9万穗/hm^2,株高119.5~131.7 cm,平均穗长24.6~27.2 cm,每穗总粒数164.2~225.4粒,结实率69.4%~82.3%,千粒重26.9~31.2 g。品种(组合)单一性状与产量的相关性分析表明,籼型杂交中稻生产欲夺取高产,宜选择生育期适中、植株半高秆或生物学产量较高、大穗大粒型品种,栽培过程中控制和调节好最高苗数,提高成穗率和确保一定的有效穗数。

关 键 词：Indica hybrid rice CHARACTERS YIELD COMPARISON 

分 类 号：S511.21[农业科学—作物学]