Natural variation in photoperiodic flowering pathway and identification of photoperiod-insensitive accessions in wild wheat, Aegilops tauschii

Koyama, Kayo; Okumura, Y; Okamoto, Emi; Nishijima, Ryo; Takumi, Shigeo

doi:10.1007/s10681-017-2089-8

Cited by 6 publications

(6 citation statements)

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“…In addition, the 7D region has been reported as a QTL for heading time in mapping populations of synthetic hexaploid wheat lines and Ae. tauschii accessions [18,28]. The 5DL region found in the Haruhinodederived line has also been reported in the mapping Ae.…”

Section: Cultivarssupporting

confidence: 70%

“…The 5DL region found in the Haruhinodederived line has also been reported in the mapping Ae. tauschii populations under short-day conditions [18]. These results suggest that the chromosomal regions contain genetic loci controlling heading time with minor effects.…”

Section: Cultivarsmentioning

confidence: 73%

“…Each of the minor genes, many of which determine narrow-sense earliness, has a small effect on the heading/flowering time, but is available for the fine-tuning of wheat heading and flowering [13,14]. In wheat relatives such as Triticum monococcum L. and Aegilops tauschii Coss., several QTLs for heading/flowering time have been found [15][16][17][18]. The early heading/flowering alleles of these QTLs in wheat relatives would be effective for heading/flowering time control in common wheat.Common wheat (Triticum aestivum L., genome constitution AABBDD) is postulated to be derived from interspecific crossing of cultivated tetraploid wheat (Triticum turgidum L., AABB) with the pollen of a wild diploid relative, Ae.…”

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confidence: 99%

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Introgression of chromosomal segments conferring early heading date from wheat diploid progenitor, Aegilops tauschii Coss., into Japanese elite wheat cultivars

et al. 2020

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The breeding of agriculturally useful genes from wild crop relatives must take into account recent and future climate change. In Japan, the development of early heading wheat cultivars without the use of any major gene controlling the heading date is desired to avoid overlap of the harvesting time before the rainy season. Here, we backcrossed two early heading lines of a synthetic hexaploid wheat, derived from a crossing between durum wheat and the wild wheat progenitor Aegilops tauschii, with four Japanese elite cultivars to develop early heading lines of bread wheat. In total, nine early heading lines that showed a heading date two to eight days earlier than their parental cultivars in field conditions were selected and established from the selfed progenies of the two-or three-times backcrossed populations. The whole appearance and spike shape of the selected early heading lines looked like their parental wheat cultivars. The mature grains of the selected lines had the parental cultivars' characteristics, although the grains exhibited longer and narrower shapes. RNA sequencingbased genotyping was performed to detect single nucleotide polymorphisms between the selected lines and their parental wheat cultivars, which revealed the chromosomal regions transmitted from the parental synthetic wheat to the selected lines. The introgression regions could shorten wheat heading date, and their chromosomal positions were dependent on the backcrossed wheat cultivars. Therefore, early heading synthetic hexaploid wheat is useful for fine-tuning of the heading date through introgression of Ae. tauschii chromosomal regions. OPEN ACCESS Citation: Takumi S, Mitta S, Komura S, Ikeda TM, Matsunaka H, Sato K, et al. (2020) Introgression of chromosomal segments conferring early heading date from wheat diploid progenitor, Aegilops tauschii Coss., into Japanese elite wheat cultivars. PLoS ONE 15(1): e0228397. https://doi.org/ 10.one of the most critical traits for environmental adaptation of higher plants to regional growth habitats. In Japan, harvesting common wheat before the rainy season is necessary to avoid severe damage of wheat grains such as pre-harvest sprouting and Fusarium head blight disease. Because Japanese wheat breeders must consider the climate characteristics peculiar to Japan, early heading and flowering time before the rainy season are among the most important traits in Japanese wheat breeding.Heading/flowering time is largely controlled by major loci, namely Vrn-1 and Ppd-1, in common wheat. The Vrn-1 loci determine vernalization requirement and are located on the long arms of homoeologous group 5 chromosomes [3], and encode an APETALA1/FRUIT-FUL-type MADS-box gene [4]. Structural mutations at the Vrn-1 loci, including insertions/ deletions in the promoter region and large deletions in the first intron, result in the generation of dominant spring-habit alleles [5,6]. Photoperiodic sensitivity is mainly determined by the Ppd-1 loci on the short arms of homoeologous group 2 chromosomes [7,8]. A dominant photoperiod-...

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Section: Cultivarssupporting

confidence: 70%

Section: Cultivarsmentioning

confidence: 73%

mentioning

confidence: 99%

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Introgression of chromosomal segments conferring early heading date from wheat diploid progenitor, Aegilops tauschii Coss., into Japanese elite wheat cultivars

et al. 2020

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“…tauschii is the only diploid species to have expanded its range east and Matsuoka et al ( 2015 ) suggest that early flowering at least partially explains range expansion into Asia. Further work by Koyama et al ( 2018 ) used a F 2 -based QTL mapping approach to determine genetic differences between photoperiod sensitive and insensitive lines. This allowed for mapping of a QTL locus on 5DL for heading under short days, proximal to the Vrn-D1 locus, along with three QTLs (one on 4D, two on 7D) for flowering under field conditions.…”

Section: Progenitor Species Provide Additional Variation For Flowerin...mentioning

confidence: 99%

“…Quantitative variation for vernalisation was also observed in Ae. tauschii accessions (Koyama et al 2018 ).…”

Section: Progenitor Species Provide Additional Variation For Flowerin...mentioning

confidence: 99%

Progenitor species hold untapped diversity for potential climate-responsive traits for use in wheat breeding and crop improvement

et al. 2022

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Climate change will have numerous impacts on crop production worldwide necessitating a broadening of the germplasm base required to source and incorporate novel traits. Major variation exists in crop progenitor species for seasonal adaptation, photosynthetic characteristics, and root system architecture. Wheat is crucial for securing future food and nutrition security and its evolutionary history and progenitor diversity offer opportunities to mine favourable functional variation in the primary gene pool. Here we provide a review of the status of characterisation of wheat progenitor variation and the potential to use this knowledge to inform the use of variation in other cereal crops. Although significant knowledge of progenitor variation has been generated, we make recommendations for further work required to systematically characterise underlying genetics and physiological mechanisms and propose steps for effective use in breeding. This will enable targeted exploitation of useful variation, supported by the growing portfolio of genomics and accelerated breeding approaches. The knowledge and approaches generated are also likely to be useful across wider crop improvement.

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Appraisal of wheat genomics for gene discovery and breeding applications: a special emphasis on advances in Asia

et al. 2020

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Natural variation in photoperiodic flowering pathway and identification of photoperiod-insensitive accessions in wild wheat, Aegilops tauschii

Cited by 6 publications

References 35 publications

Introgression of chromosomal segments conferring early heading date from wheat diploid progenitor, Aegilops tauschii Coss., into Japanese elite wheat cultivars

Introgression of chromosomal segments conferring early heading date from wheat diploid progenitor, Aegilops tauschii Coss., into Japanese elite wheat cultivars

Progenitor species hold untapped diversity for potential climate-responsive traits for use in wheat breeding and crop improvement

Appraisal of wheat genomics for gene discovery and breeding applications: a special emphasis on advances in Asia

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