An early-morning flowering trait in rice can enhance grain yield under heat stress field conditions at flowering stage

被引：19

作者：

Ishimaru, Tsutomu ^{[1
,2
,3
]}

Hlaing, Khin Thandar ^{[4
]}

Oo, Ye Min ^{[4
]}

Lwin, Tin Mg ^{[4
]}

Sasaki, Kazuhiro ^{[1
]}

Lumanglas, Patrick D. ^{[2
]}

Simon, Eliza-Vie M. ^{[2
]}

Myint, Tin Tin ^{[5
]}

Hairmansis, Aris ^{[6
]}

Susanto, Untung ^{[6
]}

Ayyenar, Bharathi ^{[7
]}

Muthurajan, Raveendran ^{[7
]}

Hirabayashi, Hideyuki ^{[8
]}

Fukuta, Yoshimichi ^{[1
,9
]}

Kobayasi, Kazuhiro ^{[10
]}

Matsui, Tsutomu ^{[11
]}

Yoshimoto, Mayumi ^{[12
]}

Htun, Than Myint ^{[4
]}

机构：

[1] Japan Int Res Ctr Agr Sci JIRCAS, 1-1 Ohwashi, Tsukuba, Ibaraki 3058686, Japan

[2] Int Rice Res Inst IRRI, DAPO Box 7777, Manila, Philippines

[3] Natl Agr & Food Res Org CARC NARO, Cent Reg Agr Res Ctr, Hokuriku Res Stn, 1-2-1 Inada, Joetsu, Niigata 9410193, Japan

[4] Yezin Agr Univ YAU, Div New Genet, Nay Pyi Taw 15013, Myanmar

[5] Dept Agr Res DAR, Yezin 095067, Nay Pyi Taw, Myanmar

[6] Indonesian Ctr Rice Res ICRR, St 9th Sukamandi, Subang, West Java, Indonesia

[7] Tamil Nadu Agr Univ, Dept Plant Biotechnol, Coimbatore 641003, Tamil Nadu, India

[8] NARO, Inst Crop Sci, 2-1-18 Kannondai, Tsukuba, Ibaraki 3058518, Japan

[9] Japan Int Res Ctr Agr Sci JIRCAS, Trop Agr Res Front TARF, 1091-1 Maezato Kawabaru, Ishigaki, Okinawa 9070002, Japan

[10] Shimane Univ, Fac Life & Environm Sci, 1060 Nishikawatsu Cho, Matsue, Shimane 6908504, Japan

[11] Gifu Univ, Fac Appl Biol Sci, 1-1 Yanagido, Gifu, Gifu 5011193, Japan

[12] NARO, Natl Inst Agroenvironm Sci NIAES, 3-1-3 Kannondai, Tsukuba, Ibaraki 3058604, Japan

来源：

FIELD CROPS RESEARCH | 2022年 / 277卷

关键词：

Early-morning flowering; Flower opening time; Heat-resilience; Rice; Yield-related traits; INDUCED SPIKELET STERILITY; SATIVA L. CULTIVARS; ORYZA-OFFICINALIS; FLORET STERILITY; EXTREMELY HOT; WILD-RICE; TEMPERATURE; CLIMATE; RESPONSES; LENGTH;

D O I：

10.1016/j.fcr.2021.108400

中图分类号：

S3 [农学（农艺学）];

学科分类号：

0901 ;

摘要：

An early-morning flowering (EMF) trait is supposed to be effective in enhancing grain yield due to mitigation of heat-induced spikelet sterility at flowering in rice. This study evaluated (i) phenotypic differences between a near-isogenic line carrying a QTL for EMF trait (designated as IR64+qEMF3) and a recurrent parent, IR64, under wide variation in climates and (ii) whether the EMF trait can enhance grain yield under heat stress at flowering. IR64+qEMF3 had significant earlier flower opening time (FOT) in diverse environmental conditions including temperate, subtropical, and tropical regions. FOT differentially responded to maximum and minimum air temperatures between genotypes. Under non-heat stress temperatures at flowering, IR64+qEMF3 had similar grain yield to IR64 with minimal changes in yield components. Seven field trials in heat-vulnerable regions of Myanmar for multiple years showed that higher percentage of grain set contributed to the significantly higher grain yield in IR64+qEMF3 when plants were exposed to daily maximum air temperatures around 36.1 degrees C or higher. Lower spikelet sterility in IR64+qEMF3 was attributed to the earlier FOT during cooler early morning hours. This is the first field study that clearly demonstrates the enhancement of grain yield due to EMF trait under diverse heat stress field conditions at flowering.

引用

页数：10

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