Mapping of quantitative trait loci controlling heading date among rice cultivars in the northernmost region of Japan

Fujino, Kenji; Sekiguchi, Hiroshi

doi:10.1270/jsbbs.58.367

Cited by 33 publications

(24 citation statements)

References 49 publications

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“…On the other hand, the heading date of Hitomebore in ODE09M was 2 days later than in C10S. In the case of Kirara 397, a cultivar with low photoperiodism (Fujino, 2003), the heading date in the control experiment in 2009 in Morioka (CO9M) was just 1 day later than that in C10S, despite the difference in summer temperature. The difference in heading date between the results from the ODE conditions designed to be an analog of Morioka (ODE09M-m) and those designed to be an analog of Sapporo (ODE09M-s) (indicated as in Fig.…”

Section: Feasibility Of Ode Experimentsmentioning

confidence: 91%

Assessment of paddy rice heading date under projected climate change conditions for Hokkaido region based on the field experiment

Nemoto

Hamasaki

Sameshima

et al. 2011

J. Agric. Meteorol.

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Impact assessment and adaptation planning to enable growth of paddy rice (Oryza sativa L.) under conditions of ongoing climate change are necessary in the Hokkaido region of northern Japan because of the intensive climate warming ( 2-3 in summer) projected to occur during the 21st century. Most previous studies have been based on extrapolation of results from past and present experimental data on unexperienced warming conditions under projected climatic change. These facts motivated us to use an assessment method known as an open-field day-length-extension (ODE) experiment. First, we confirmed the feasibility of an ODE experiment, which involves artificially extending day length with supplemental lighting. ODE treatment was performed in Morioka in 2009 (treatment ODE09M), where the summer temperature was 2.5 higher than the current average summer temperature in Sapporo, and the results were compared with those obtained in Sapporo, Hokkaido, in 2010 (treatment C10S), which had an extraordinarily hot summer (mean daily temperature 2.3 higher than normal). The difference in heading date between ODE09M and C10S was small, i.e., 4 days for the three cultivars Koshihikari, Hitomebore, and Akitakomachi. Second, by comparing previous temperature gradient chamber (TGC) results with those from the ODE experiment, we found that a TGC experiment system was likely to overestimate the effect of temperature on heading date by up to 7 days. Finally, we calculated paddy rice cultivation under projected climate change conditions in Sapporo in terms of three critical dates for stable rice cultivation: the early limit for transplanting, the early limit for heading, and the late limit for heading. The warmer climate condition at Morioka formed by the ODE experiment that is an analog of future climate (2.5 higher than the current average) at an northern site, Sapporo, would allow successful cultivation of Hitomebore and Akitakomachi, but not Koshihikari, in Sapporo.

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Section: Feasibility Of Ode Experimentsmentioning

confidence: 91%

Assessment of paddy rice heading date under projected climate change conditions for Hokkaido region based on the field experiment

Nemoto

Hamasaki

Sameshima

et al. 2011

J. Agric. Meteorol.

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“…Whereas more than 90% of the obligate varieties are cultivated in tropical areas, most others in the temperate or subtropical areas are facultative, exhibiting a quantitative response to short clays and even flowering under continuous light (Yu and Yao, 1967). Those genotypes that either are cultivated in high-latitude temperate regions (Okumoto et al, 1996;Fujino, 2003) or which are early-season cultivars in low-latitude temperate areas are considered day-neutral (Shen et al, 1965).…”

Section: Factors Affecting Flowering Time In Ricementioning

confidence: 99%

Diversified mechanisms for regulating flowering time in a short-day plant rice

Lee

2007

J. Plant Biol.

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Flowering in rice is influenced by not only endogenous factors that comprise an autonomous pathway, but also environmental effects, such as photoperiod, water availability, and temperature just before floral initiation. Recent molecular genetics studies have elucidated the functional roles of genes involved in the photoperiod pathway, e.g., photoreceptors, circadian clock components, and short-day (SD) promotion factors. Although these molecular players are well conserved between rice and Arabidopsis, their actual genetic functions are distinct. This is exemplified by Hdl (a CO counterpart) and phytochromes, in particular, rice PHYA. Hdl has a dual role in regulating flowering time and the expression of Hd3a (an FT counterpart) repression under long-day (LD) conditions while promotion under SDs. Models have been proposed to explain these photoperioddependent antagonistic activities. Some regulatory factors are present in only one of the model systems, e.g., FLC in Arabidopsis or Ehdl in rice. Furthermore, epistatic relationships vary among such flowering regulators as Hd3a (FT), OsMADSSO (SOC1), and OsMADS14 (AP1). Further experiments to probe these differences will be essential to enlarging our understanding of the diversified flowering regulation mechanisms in rice.

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“…Due to the importance of flowering time, much progress has been made in understanding its genetic control using natural variation in rice (Izawa 2007a, b;Yano et al 2001). In addition, genes controlling diverse phenotypic variations in flowering time, such as extremely early and late heading behavior, have been identified (Fujino and Sekiguchi 2005a, b;Fujino and Sekiguchi 2008;Nonoue et al 2008;Uga et al 2007). These studies have suggested that allelic variations contributing to the wide adaptability of rice may have occurred during the diversification of cultivated rice or may represent existing mutations in the gene pool prior to rice domestication.…”

Section: Introductionmentioning

confidence: 99%

Multiple introgression events surrounding the Hd1 flowering-time gene in cultivated rice, Oryza sativa L.

Fujino¹,

Sekiguchi³

et al. 2010

Mol Genet Genomics

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Flowering time is a major determinant for the local adaptation of crops. Hd1 is a key flowering-time gene in rice and is orthologous to the Arabidopsis CONSTANS gene. To elucidate the role of Hd1 in selection, we examined the Hd1 alleles of 60 landraces of Asian cultivated rice (Oryza sativa L.) originating from all regions of Asia, which comprised three cultivar groups, indica, japonica, and aus. The identified alleles were classified into four allele groups. The functional Hd1 alleles in allele groups I and II corresponded to indica and japonica, respectively. Non-functional alleles in these groups were not clearly associated with cultivar groups or locations. Allele groups III and IV corresponded to the aus cultivar group. The ancestry of each cultivar group was identified by the coalescent approach for Hd1 molecular evolution using the haplotype patterns of 14 regions over the 1.1 Mb chromosomal region surrounding Hd1 and the pSINE patterns of two loci, 1.4 and 4.4 Mb apart from Hd1. The haplotype patterns clearly revealed that Hd1 allele migration was caused by multiple and complex introgression events between cultivar groups. The Hd1 haplotypes among dozens of accessions of the wild species O. rufipogon were strongly divergent and only two of the haplotype clusters in O. rufipogon were closely related to those in cultivated rice. This strongly suggested that multiple introgression events have played an important role in the shaping and diversification of adaptation in addition to primary selection steps at the beginning of domestication.

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Mapping of quantitative trait loci controlling heading date among rice cultivars in the northernmost region of Japan

Cited by 33 publications

References 49 publications

Assessment of paddy rice heading date under projected climate change conditions for Hokkaido region based on the field experiment

Assessment of paddy rice heading date under projected climate change conditions for Hokkaido region based on the field experiment

Diversified mechanisms for regulating flowering time in a short-day plant rice

Multiple introgression events surrounding the Hd1 flowering-time gene in cultivated rice, Oryza sativa L.

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