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首页> 外文期刊>Field Crops Research >Comparisons of plant-type characteristics and yield components in filial generations of Indica x Japonica crosses grown in different regions in China
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Comparisons of plant-type characteristics and yield components in filial generations of Indica x Japonica crosses grown in different regions in China

机译：中国不同地区杂交x型杂交子代的株型特征和产量构成比较

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摘要

Ideotype breeding plays a significant role in increasing rice yields. A number of representative plant-type models have been developed based on environmental conditions and yield potential. Identifying the effects of the ecological environment on plant-type models will provide insight into rice ideotype breeding, and will be useful to optimize cultivation management. The aim of this study was to analyze the effects of different ecological conditions on plant-type traits and yields, and to identify the relationships between plant-type models and yield components in different ecological environments. Two populations of filial generations Indica x Japonica rice were grown in Liaoning, Sichuan, Shanghai, and Guangdong in 2012. The grain yield showed a downward trend from high latitude to low latitude. The traits of the plant-types differed markedly among the four regions. Plant height was significantly greater in Sichuan and Liaoning than in Shanghai and Guangdong. Based on panicle length, the four regions were ranked as follows (longest panicle length to shortest) Shanghai > Sichuan > Guangdong > Liaoning. For flag leaf length, the ranking order was as follows (longest to shortest): Shanghai > Guangdong> Sichuan > Liaoning; for flag leaf width (widest to narrowest): Sichuan > Liaoning > Shanghai > Guangdong. The flag leaf angle was larger in Liaoning and Guangdong than in Shanghai and Sichuan. Panicle curvature was significantly influenced by genetic factors. The long-flag-leaf, curved-panicle typewith characteristics of the super hybrid plant-type model showed significant vigor in Guangdong, Sichuan, and Shanghai. The short-flag-leaf, erect-panicle plant-type was more adaptable to the environmental conditions in Liaoning. There were strong correlations between some plant-type traits and yield components. However, the strengths and directions of the correlations were not completely consistent because of the different populations in different ecological environments. In ideotype breeding practice,the criteria should be regionalized based on local climatic and cultivation conditions. Such breeding should consider not only traits of "space", but also specific geoecotypes.
机译：同型育种在提高水稻产量中起重要作用。基于环境条件和产量潜力，已经开发了许多代表性的植物类型模型。识别生态环境对植物类型模型的影响将有助于了解水稻的表型育种，并将有助于优化栽培管理。这项研究的目的是分析不同生态条件对植物类型性状和产量的影响，并确定不同生态环境中植物类型模型与产量组成之间的关系。 2012年，辽宁，四川，上海和广东种植了两个子代的x型x粳稻。粮食产量呈现出从高纬度到低纬度的下降趋势。在四个区域之间，植物类型的性状显着不同。四川和辽宁的株高明显高于上海和广东。根据穗长，四个区域的排名如下（穗长最长至最短）：上海>四川>广东>辽宁。对于旗叶长度，排名顺序为（从长到短）：上海>广东>四川>辽宁;旗叶宽度（最宽至最窄）：四川>辽宁>上海>广东。辽宁和广东的旗叶角比上海和四川的大。穗弯曲受到遗传因素的显着影响。具有超级杂交植物型模型特征的长旗叶，弯穗型在广东，四川和上海表现出显着的活力。短旗叶直立穗型植物更适合辽宁的环境条件。一些植物类型性状与产量构成要素之间存在很强的相关性。但是，由于不同的生态环境中的种群不同，相关性的强度和方向并不完全一致。在表型育种实践中，应根据当地气候和栽培条件对标准进行区域划分。这种育种不仅应考虑“空间”的特征，还应考虑特定的地理生态型。

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