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首页> 外文期刊>Australian Journal of Crop Science >Morphological, anatomical, and physiological characteristics involved in development of the large culm trait in rice
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Morphological, anatomical, and physiological characteristics involved in development of the large culm trait in rice

机译：水稻大茎秆性状发育的形态，解剖和生理特征

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The large culm trait is an important agronomical characteristic in crops. Although the effects of this trait on lodging resistance, yield production, and biomass accumulation have been widely examined, its significance in super rice breeding remains to be determined. In our current study, the morphological, anatomical, and physiological characteristics of three large culm rice (Oryza sativa L.) cultivars (JH186, JH126, and JH214) were compared to three common rice cultivars (Xiushui09, Xiushui63, and Zhenuo5). Overall, the large culm cultivars exhibited greater plant size, culm diameter, and flag leaf length and width, as well as lower tiller numbers, although variations were observed among the six rice cultivars. The large culm cultivars also exhibited larger leaf vascular bundles, more culm vascular bundles, more grains per panicle and blighted grains, lower seed-setting rates, and larger panicles. The transpiration rate was significantly higher in the large culm cultivars, whereas instantaneous water use efficiency was lower compared to the common cultivars. JH186 and JH214 also exhibited higher photosynthetic efficiency and apoplastic transport ability. These results indicate that a systematic modification of morphology, anatomy, and physiology was involved in the development of the large culm trait in rice, and cultivars with large culm characteristics are ideal candidates for super rice breeding.
机译：大茎秆性状是农作物的重要农艺特性。尽管已广泛研究了该性状对抗倒伏性，产量产生和生物量积累的影响，但其在超级稻育种中的意义尚待确定。在我们目前的研究中，将三种大型茎秆水稻（Oryza sativa L.）品种（JH186，JH126和JH214）的形态，解剖和生理特征与三种常见水稻品种（Xiushui09，Xiushui63和Zhenuo5）进行了比较。总体而言，尽管在六个水稻品种中观察到差异，但大型茎秆品种显示出更大的植株尺寸，茎秆直径，旗叶长度和宽度以及较低的分till数。大型茎秆品种还表现出较大的叶片维管束，茎秆维管束，每穗更多的谷物和枯萎的谷粒，较低的结实率和更大的穗。与普通品种相比，大茎秆品种的蒸腾速率显着较高，而瞬时水分利用效率则较低。 JH186和JH214还表现出更高的光合作用效率和质外传递能力。这些结果表明，水稻的大茎秆性状的发展涉及形态，解剖学和生理学的系统修饰，具有大茎秆特征的品种是超级稻育种的理想候选者。

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