高密度种植专用油菜重要农艺性状与产量的关系分析

doi:10.3864/j.issn.0578-1752.2010.09.005

中国农业科学 ›› 2010, Vol. 43 ›› Issue (9): 1800-1806 .doi: 10.3864/j.issn.0578-1752.2010.09.005

高密度种植专用油菜重要农艺性状与产量的关系分析

宋稀,刘凤兰,郑普英,张学昆,陆光远,付桂萍,程勇

（中国农业科学院油料作物研究所/农业部油料作物生物学重点开放实验室）

收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2010-05-01 发布日期:2010-05-01
通讯作者: 张学昆

Correlation Analysis Between Agronomic Traits and Yield of Rapeseed (Brassica napus L.) for High-Density Planting

SONG Xi, LIU Feng-lan, ZHENG Pu-ying, ZHANG Xue-kun, LU Guang-yuan, FU Gui-ping, CHENG Yong

（中国农业科学院油料作物研究所/农业部油料作物生物学重点开放实验室）

Received:1900-01-01 Revised:1900-01-01 Online:2010-05-01 Published:2010-05-01
Contact: ZHANG Xue-kun

摘要/Abstract

摘要： 【目的】分析适宜高密度种植的油菜与适宜常规密度种植的油菜间重要农艺性状与产量关系的差异,为机械化高密度种植油菜的选育方向提供借鉴。【方法】对2008—2009年中国冬油菜区试中22个机械化高密度种植组合（品系）和72个常规密度种植的组合（品系）9个重要农艺性状与小区产量间进行相关及通径分析。【结果】高密度专用油菜组合的每角粒数、主花序有效角果数、单株有效角果数、结角密度与小区产量都有显著或极显著的相关关系,对小区产量的直接作用大小顺序为：结角密度（0.881）＞分枝部位高度（-0.614）＞株高（0.586）＞每角粒数（0.360）＞分枝数（-0.144）＞主花序有效角果数（-0.143）＞单株有效角果数（0.111）＞主花序有效长（0.095)＞千粒重（-0.055)。常规密度种植的油菜分枝数、主花序有效角果数、单株有效角果数、每角粒数以及分枝部位高度与产量有显著或极显著相关关系,对产量的直接效应顺序则为单株有效角果数（0.412）＞株高（0.297）＞主花序有效角果数（0.260）＞每角粒数（0.249）＞主花序有效长（-0.224）＞千粒重（0.156）＞分枝部位高度（-0.104）＞分枝数（0.095）＞结角密度（-0.003）。【结论】相比于常规密度种植的油菜,高密度种植油菜的选育应重点加强对结角密度和主花序有效角果数的选择,努力提高单株有效角果数和每角粒数并适当减少无效分枝数。

关键词: 高密度种植, 常规种植密度, 农艺性状, 相关分析, 通径分析

Abstract: 【Objective】 The difference in the relation of agronomic traits and yield between rapeseeds suitable for mechanized high-density planting and conventional-density planting was studied. 【Method】 Twenty-two hybids (or lines) for high-density planting were studied in national winter rapeseed regional test from 2008 to 2009. The correlation and path analysis of nine major agronomic traits to yield per plot were conducted by contrast of seventy-two rapeseeds which are suitable for conventional-density planting.【Result】For the former, seeds per silique,the number of effective siliques on main inflorescence,the number of effective siliques per plant and density of siliques with yield per plot showed a significant or extremely significant correlation.The order of direct effect of traits on yield per plot was density of siliques (0.881)＞branch height (-0.614)＞plant height (0.586)＞seeds per silique (0.360)＞the number of branches (-0.144)＞the number of effective siliques on main inflorescence (-0.143)＞the number of effective siliques per plant (0.111)＞effective length of main inflorescence (0.095)＞1000-seed weight (-0.055). However, the number of branches,the number of effective siliques on main inflorescence,the number of effective siliques per plant,seeds per silique and branch height showed a significant or extremely significant correlation with yield per plot for rapeseeds suitable for conventional-density planting.The order of direct effect was the number of effective siliques per plant (0.412)＞plant height (0.297)＞the number of effective siliques on main inflorescence (0.260)＞seeds per silique (0.249)＞effective length of main inflorescence (-0.224)＞1000-seed weight (0.156)＞branch height (-0.104)＞the number of branches (0.095)＞the density of siliques (-0.003).【Conclusion】 Compared with rapeseeds suitable for conventional-density planting,the breeding aims of rapeseed selected specically for high-density planting should lay more emphasis on density of siliques and the number of effective siliques on main inflorescence. Furthermore, efforts in increase of the number of effective siliques per plant as well as seeds per silique and decrease of the number of null branches should be made.

Key words: high-density planting, conventional-density planting, agronomic traits, correlation analysis, path analysis

宋稀,刘凤兰,郑普英,张学昆,陆光远,付桂萍,程勇. 高密度种植专用油菜重要农艺性状与产量的关系分析[J]. 中国农业科学, 2010, 43(9): 1800-1806 .

SONG Xi,LIU Feng-lan,ZHENG Pu-ying,ZHANG Xue-kun,LU Guang-yuan,FU Gui-ping,CHENG Yong. Correlation Analysis Between Agronomic Traits and Yield of Rapeseed (Brassica napus L.) for High-Density Planting [J]. Scientia Agricultura Sinica, 2010, 43(9): 1800-1806 .

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高密度种植专用油菜重要农艺性状与产量的关系分析

Correlation Analysis Between Agronomic Traits and Yield of Rapeseed (Brassica napus L.) for High-Density Planting

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