Plant Density Effect on Grain Number and Grain Weight at Different Spikelet and Grain Positions in Winter Wheat
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- 英文论文题名：Plant Density Effect on Grain Number and Grain Weight at Different Spikelet and Grain Positions in Winter Wheat
- 论文作者：Yong Li ; Zhengyong Cui ; Yingli Ni ; Mengjing Zheng ; Dongqing Yang ; Min Jin ; Jin Chen ; Zhenlin Wang ; Yanping Yin
- 英文论文作者：Yong Li ; Zhengyong Cui ; Yingli Ni ; Mengjing Zheng ; Dongqing Yang ; Min Jin ; Jin Chen ; Zhenlin Wang ; Yanping Yin ; National Key Laboratory of Crop Biology ; Agronomy College of Shandong Agricultural University ; Agricultural Bureau of Rencheng District ; Agricultural Bureau of Zhangqiu District
- 年：2016
- 作者机构：National Key Laboratory of Crop Biology,Agronomy College of Shandong Agricultural University;Agricultural Bureau of Rencheng District,Jining,Shandong,P.R.China;Agricultural Bureau of Zhangqiu District,Jinan,Shandong,P.R.China;
- 会议召开时间：2016-10-26
- 会议录名称：2016年全国青年作物栽培与生理学术研讨会论文集
- 语种：英文
- 分类号：S512.11
- 学会代码：CSSC
- 会议名称：2016年全国青年作物栽培与生理学术研讨会
- 会议地点：中国山东泰安
- 主办单位：中国作物学会
- 学会名称：中国作物学会
- 页数：1
- 文件大小：58k
- 原文格式：O
- 会议级别：全国
摘要
In winter wheat,grain development is asynchronous.The grain number and grain weight vary significantly at different spikelet and grain positions among wheat cultivars grown at different plant densities.In this study,two winter wheat(Triticum aestivum L.) cultivars,'Wennong6' and 'Jimai20,' were grown under four different plant densities for two seasons,in order to study the effect of plant density on the grain number and grain weight at different spikelet and grain positions.The results showed that grain number,spikelet weight,and grain weight first increased and then decreased with spikelet position from the bottom to the top.The seed-setting traits and grain weight of the main stem spike were superior to those of the tiller spike.The effects of spikelet and grain positions on grain weight varied with the grain number of spikelets.In both cultivars,the single-grain weight of the basal and middle two-grain spikelets was higher at the 2~(nd)grain position than that at the 1~(st) grain position,while the opposite occurred in the top two-grain spikelets.In the three-grain spikelets,the distribution of the single-grain weight was different between cultivars.In the four-grain spikelets of Wennong6,the single-grain weight was the highest at the 2~(nd) grain position,followed by the 1~(st),3~(rd),and 4~(th) grain positions.Regardless of the spikelet and grain positions,the single-grain weight was the highest at the 1~(st) and 2~(nd) grain positions and the lowest at the 3~(rd) and 4~(th) grain positions.Overall,plant density affected the yield by controlling the seed-setting characteristics of the tiller spike.Therefore,wheat yield can be increased by decreasing the sterile basal and top spikelets and enhancing the grain weight at the 3rd and 4~(th) grain positions,while maintaining it at the 1~(st) and 2~(nd) grain positions on the spikelet.
In winter wheat,grain development is asynchronous.The grain number and grain weight vary significantly at different spikelet and grain positions among wheat cultivars grown at different plant densities.In this study,two winter wheat(Triticum aestivum L.) cultivars,'Wennong6' and 'Jimai20,' were grown under four different plant densities for two seasons,in order to study the effect of plant density on the grain number and grain weight at different spikelet and grain positions.The results showed that grain number,spikelet weight,and grain weight first increased and then decreased with spikelet position from the bottom to the top.The seed-setting traits and grain weight of the main stem spike were superior to those of the tiller spike.The effects of spikelet and grain positions on grain weight varied with the grain number of spikelets.In both cultivars,the single-grain weight of the basal and middle two-grain spikelets was higher at the 2~(nd)grain position than that at the 1~(st) grain position,while the opposite occurred in the top two-grain spikelets.In the three-grain spikelets,the distribution of the single-grain weight was different between cultivars.In the four-grain spikelets of Wennong6,the single-grain weight was the highest at the 2~(nd) grain position,followed by the 1~(st),3~(rd),and 4~(th) grain positions.Regardless of the spikelet and grain positions,the single-grain weight was the highest at the 1~(st) and 2~(nd) grain positions and the lowest at the 3~(rd) and 4~(th) grain positions.Overall,plant density affected the yield by controlling the seed-setting characteristics of the tiller spike.Therefore,wheat yield can be increased by decreasing the sterile basal and top spikelets and enhancing the grain weight at the 3rd and 4~(th) grain positions,while maintaining it at the 1~(st) and 2~(nd) grain positions on the spikelet.
In winter wheat,grain development is asynchronous.The grain number and grain weight vary significantly at different spikelet and grain positions among wheat cultivars grown at different plant densities.In this study,two winter wheat(Triticum aestivum L.) cultivars,'Wennong6' and 'Jimai20,' were grown under four different plant densities for two seasons,in order to study the effect of plant density on the grain number and grain weight at different spikelet and grain positions.The results showed that grain number,spikelet weight,and grain weight first increased and then decreased with spikelet position from the bottom to the top.The seed-setting traits and grain weight of the main stem spike were superior to those of the tiller spike.The effects of spikelet and grain positions on grain weight varied with the grain number of spikelets.In both cultivars,the single-grain weight of the basal and middle two-grain spikelets was higher at the 2~(nd)grain position than that at the 1~(st) grain position,while the opposite occurred in the top two-grain spikelets.In the three-grain spikelets,the distribution of the single-grain weight was different between cultivars.In the four-grain spikelets of Wennong6,the single-grain weight was the highest at the 2~(nd) grain position,followed by the 1~(st),3~(rd),and 4~(th) grain positions.Regardless of the spikelet and grain positions,the single-grain weight was the highest at the 1~(st) and 2~(nd) grain positions and the lowest at the 3~(rd) and 4~(th) grain positions.Overall,plant density affected the yield by controlling the seed-setting characteristics of the tiller spike.Therefore,wheat yield can be increased by decreasing the sterile basal and top spikelets and enhancing the grain weight at the 3rd and 4~(th) grain positions,while maintaining it at the 1~(st) and 2~(nd) grain positions on the spikelet.
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