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Iwaki, K.; Nakagawa, Kohjin; Kuno, Haruko; Kato, Kenji

doi:10.1023/a:1003862401570

Cited by 52 publications

(12 citation statements)

References 17 publications

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“…Second, PC1 showed a clear gradient for the VRN - A1 and VRN - D1 alleles (Fig. 1c, e), which have been reported before to be correlated with sowing time in other parts of the world (Gotoh 1979; Stelmakh 1990, 1998; Goncharov 1998; Iwaki et al 2000, 2001). …”

Section: Discussionsupporting

confidence: 63%

Identification and validation of QTL for grain yield and plant water status under contrasting water treatments in fall-sown spring wheats

et al. 2018

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Key message Chromosome regions affecting grain yield, grain yield components and plant water status were identified and validated in fall-sown spring wheats grown under full and limited irrigation. AbstractIncreases in wheat production are required to feed a growing human population. To understand the genetic basis of grain yield in fall-sown spring wheats, we performed a genome-wide association study (GWAS) including 262 photoperiod-insensitive spring wheat accessions grown under full and limited irrigation treatments. Analysis of molecular variance showed that 4.1% of the total variation in the panel was partitioned among accessions originally developed under fall-sowing or spring-sowing conditions, 11.7% among breeding programs within sowing times and 84.2% among accessions within breeding programs. We first identified QTL for grain yield, yield components and plant water status that were significant in at least three environments in the GWAS, and then selected those that were also significant in at least two environments in a panel of eight biparental mapping populations. We identified and validated 14 QTL for grain yield, 15 for number of spikelets per spike, one for kernel number per spike, 11 for kernel weight and 9 for water status, which were not associated with differences in plant height or heading date. We detected significant correlations among traits and colocated QTL that were consistent with those correlations. Among those, grain yield and plant water status were negatively correlated in all environments, and six QTL for these traits were colocated or tightly linked (< 1 cM). QTL identified and validated in this study provide useful information for the improvement of fall-sown spring wheats under full and limited irrigation.Electronic supplementary materialThe online version of this article (10.1007/s00122-018-3111-9) contains supplementary material, which is available to authorized users.

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Section: Discussionsupporting

confidence: 63%

Identification and validation of QTL for grain yield and plant water status under contrasting water treatments in fall-sown spring wheats

et al. 2018

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“…This hypothesis is supported by the lack of natural diversity for vernalization requirement in the wheat colinear centromeric regions on chromosomes 5AS and 5BS. In addition, the narrow geographical distribution of the dominant Vrn - D4 (Iwaki et al 2000, 2001) argues in favor of a recent origin of this gene/allele in hexaploid wheat.…”

Section: Discussionmentioning

confidence: 99%

“…The dominant spring allele Vrn - D4 is found mainly in hexaploid wheat varieties from Asia, especially in India and nearby regions (Iwaki et al 2000, 2001). The Vrn - D4 allele was transferred to Western wheat varieties from the Indian cultivar Muzaffarnagar into the cultivar Gabo, which was widely cultivated in Australia between the late 1940s and the late 1960s (O’Brien et al 2001).…”

Section: Introductionmentioning

confidence: 99%

Fine mapping and epistatic interactions of the vernalization gene VRN-D4 in hexaploid wheat

et al. 2013

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Wheat vernalization requirement is mainly controlled by the VRN1, VRN2, VRN3, and VRN4 genes. The first three have been cloned and have homoeologs in all three genomes. VRN4 has been found only in the D genome (VRN-D4) and has not been cloned. We constructed a high-density genetic map of the VRN-D4 region and mapped VRN-D4 within a 0.09 cM interval in the centromeric region of chromosome 5D. Using telocentric 5D chromosomes generated from the VRN-D4 donor Triple Dirk F, we determined that VRN-D4 is located on the short arm. The VRN-D4 candidate region is colinear with a 2.24 Mb region on Brachypodium distachyon chromosome 4, which includes 127 predicted genes. Ten of these genes have predicted roles in development but we detected no functional polymorphisms associated to VRN-D4. Two recombination events separated VRN-D4 from TaVIL-D1, the wheat homolog of Arabidopsis vernalization gene VIL1, confirming that this gene is not a candidate for VRN-D4. We detected significant interactions between VRN-D4 and other four genes controlling vernalization requirement (Vrn-A1, Vrn-B1, Vrn-D1, and Vrn-B3), which confirmed that VRN-D4 is part of the vernalization pathway and that it is either upstream or is part of the regulatory feedback loop involving VRN1, VRN2 and VRN3 genes. The precise mapping of VRN-D4 and the characterization of its interactions with other vernalization genes provide valuable information for the utilization of VRN-D4 in wheat improvement and for our current efforts to clone this vernalization gene.Electronic supplementary materialThe online version of this article (doi:10.1007/s00438-013-0788-y) contains supplementary material, which is available to authorized users.

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“…Temperature among all the environmental factors has a dictating role in plant growth, development, and adaptation, thereby deciding the geographical distribution of most vernalization genes as well. In other words, the degree of winter coldness prevailing in a specific geographical region seems to mediate the distribution pattern of different vernalization genes (Iwaki et al, 2000). Spring wheat is cultivated in those parts of the world where average January temperature is less than -12.2°C (Wilsie, 1962, as cited by Iwaki et al, 2000.…”

Section: Discussionmentioning

confidence: 99%

“…This series of orthologous genes is collectively referred as Vrn-1 genes (Santra et al, 2009). Other vernalization genes have been mapped on chromosomes 3B, 4B, 4D, Vrn-D5 on 5D, and Vrn-B3 on 7B (Iwaki et al, 2000) and these genes are considered as part of Vrn-2 series. Vernalization genes confer varying potency, ranging from complete insensitivity to partial or weak sensitivity depending on the Vrn allele possessed and the size of deletion.…”

mentioning

confidence: 99%

Phenotypic Effects of the Flowering Gene Complex in Canadian Spring Wheat Germplasm

et al. 2013

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W heat forms the staple diet in more than 40 countries and is grown in a wide range of temperatures, moisture levels, latitudes, altitudes, and soils (Curtis, 2002). Wheat is cultivated on 225 million ha globally and occupies the largest area under any single crop, with a total global production of 681 million t (FAO, 2009).Wheat has enormous genetic potential to synchronize its flowering in favorable environmental conditions either by accelerating or delaying flowering, and this key feature is central to its global adaptability. In the western Canadian Prairie region, three types of wheat are produced: spring hexaploid, winter hexaploid, and durum wheat (Triticum turgidum L.). Through the course of time and more specified market demands, Canadian wheat has been further classified into the following nine classes: Canada Western Red Spring (CWRS),

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Cited by 52 publications

References 17 publications

Identification and validation of QTL for grain yield and plant water status under contrasting water treatments in fall-sown spring wheats

Identification and validation of QTL for grain yield and plant water status under contrasting water treatments in fall-sown spring wheats

Fine mapping and epistatic interactions of the vernalization gene VRN-D4 in hexaploid wheat

Phenotypic Effects of the Flowering Gene Complex in Canadian Spring Wheat Germplasm

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