Architectural and Physiological Features to Gain High Yield in an Elite Rice Line YLY1

Rice

Xin-Guang Zhu¹  Tiangen Chang¹  Qiyun Deng²  Qingfeng Song²  Jun Wu²  Yi Luo²  Shuoqi Chang²  Xiaolong Chen² 

[1] National Key Laboratory of Plant Molecular Genetics, CAS Center of Excellence for Molecular Plant Sciences, Shanghai Institute of Plant Physiology and Ecology, CAS;State Key Laboratory of Hybrid Rice, Hunan Hybrid Rice Research Center (HHRRC);

关键词: Super hybrid rice;    YLY1;    Photosynthesis;    Grain filling;    Ideotype;   

DOI  :  10.1186/s12284-020-00419-y

来源: DOAJ

【 摘 要 】

Abstract Identification of traits strongly associated with high yield can help future gene engineering towards improvements of productivity. Here we systematically determine the major architectural and physiological features associated with high yield in two elite historical hybrid rice cultivars, i.e., YLY1 and LYP9. Data from a six-year experiment show that high yield of YLY1 are related to a number of architectural and physiological parameters. Compared to LYP9, YLY1 had 5.5% and 47.3% higher canopy photosynthesis under high and low photosynthetic photon flux densities, respectively, during the grain filling stage, an average 1.5% higher proportion of biomass allocation to above-ground tissues, a 4.5%–10.5% higher photosynthate reserve in leaf sheath before grain filling, and a more efficient photosynthate translocation during grain filling and finally an average 25.2% higher number of productive tillers. These features differ dramatically from features associated with high yield in YLY900 and Yongyou12#, two other high-yielding rice cultivars in China. These identified features and their combinations can support designing new strategies in the future high-yield rice breeding.

【 授权许可】

Unknown