Journal of Integrative Agriculture ›› 2023, Vol. 22 ›› Issue (3): 716-726.DOI: 10.1016/j.jia.2022.08.013

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JIA-2022-0012 直立穂型基因与环境对水稻产量及其构成因素的互作效应

  

  • 收稿日期:2022-01-05 接受日期:2022-03-07 出版日期:2023-03-20 发布日期:2022-03-07

Effects of erect panicle genotype and environment interactions on rice yield and yield components

WANG Yuan-zheng1, 3*, Olusegun IDOWU2*#, WANG Yun3, HOMMA Koki4, NAKAZAKI Tetsuya2, ZHENG Wen-jing1, XU Zheng-jin3#, SHIRAIWA Tatsuhiko2   

  1. 1 Rice Research Institute, Liaoning Academy of Agricultural Sciences, Shenyang 110101, P.R.China

    2 Division of Agronomy and Horticulture Science, Graduate School of Agriculture, Kyoto University, Kyoto 606-8501, Japan

    3 Rice Research Institute, Shenyang Agricultural University/Key Laboratory of Northeast Rice Biology and Breeding, Ministry of Agriculture and Rural Affairs/Key Laboratory of Northern Japonica Super Rice Breeding, Ministry of Education, Shenyang 110866, P.R.China

    4 Division of Biological Resource Sciences, Graduate School of Agricultural Science, Tohoku University, Sendai 980-8576, Japan

  • Received:2022-01-05 Accepted:2022-03-07 Online:2023-03-20 Published:2022-03-07
  • About author:#Correspondence XU Zheng-jin, Tel/Fax: +86-24-88487183, E-mail: xuzhengjin@126.com; Olusegun Idowu, Mobile: +81-7038998035, E-mail: idowu.olusegun.adejola@gmail.com * These authors contributed equally to this study.
  • Supported by:

    This study was supported by the Joint Funds of the National Natural Science Foundation of China (U1708231 and JSPS KAKENHI, 26292013).

摘要: DEP1基因调控的直立穗型基因(EP基因)已被广泛应用到中国粳稻的高产育种中,而DEP1基因在群体水平上的育种价值还有待深入研究。本研究通过构建以秋田小町(AKI)及辽粳5号(LG 5)为遗传背景的DEP1近等基因系在不同年份及不同生态环境下,分析DEP1基因与环境条件对水稻产量及其构成因素的互作效应。两对近等基因系材料分别于20162017年采用随机区组方法种植在沈阳(中国)及京都(日本),2018年种植在京都(日本)。结果表明,AKI-EPAKI-NEP的平均产量分别为6.67 t ha−1 6.13 t ha−1 LG 5-EPLG 5-NEP的平均产量分别为6.66 t ha−1 6.58 t ha−1 EP基因的效应可以增加穗数(PN)及每平方米穗粒数(GNPM)从而增加收获指数(HI),但降低了籽粒的千粒重(KGW)。EP基因型与NEP基因型在产量的比值及在生物产量上的比值与抽穗前15天到抽穗后25天这40天内日平均辐射呈显著正相关,说明等位基因EP基因的有效性取决于太阳辐射的高低。本试验研究表明,等位基因EP型对水稻的形成具有一定的正向作用,但需要在较高的太阳辐射条件下才能对水稻产生形成积极影响。

Abstract:

The dense and erect panicle (EP) genotype conferred by DEP1 has been widely used in the breeding of high-yield Chinese japonica rice varieties.  However, the breeding value of the EP genotype has rarely been determined at the plant population level.  Therefore, the effects of the interaction of EP genotype and the environment at different locations and times on rice yield and its various components were investigated in this study.  Two sets of near-isogenic lines (NILs) of EP and non-EP (NEP) genotypes with Liaojing 5 (LG5) and Akitakomachi (AKI) backgrounds were grown in the field in 2016 and 2017 in Shenyang, China, and Kyoto, Japan.  In 2018, these sets were grown only in Kyoto, Japan.  The average yields of the EP and NEP genotypes were 6.67 and 6.13 t ha−1 for the AKI background, and 6.66 and 6.58 t ha−1 for the LG5 background, respectively.  The EP genotype positively affected panicle number (PN) and grain number per square meter (GNPM), mostly resulting in a positive effect on harvest index (HI).  In contrast, the EP genotype exerted a negative effect on thousand-grain weight (KGW).  The ratio of the performance of the EP genotype relative to the NEP genotype in terms of yield and total biomass correlated positively with mean daily solar radiation during a 40-day period around heading.  These results indicate that the effectiveness of the EP genotype depends on the availability of solar radiation, and the effect of this genotype is consistently positive for sink formation, conditional in terms of source capacity, and positive in a high-radiation environment.

Key words: erect panicle , genotype by environment interaction , rice (Oryza sativa L.) , solar radiation , yield