Geographic distribution of Vrn-genes in landraces and improved varieties of spring bread wheat

Stelmakh, A. F.

doi:10.1007/bf00033278

Cited by 43 publications

(7 citation statements)

References 5 publications

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“…However, Vrn-A1a and Ppd-D1a alleles showed significant correlation with all three PCs, assuming a strong connection of these alleles and plant phenology and architecture, while Vrn-B1 only correlated with PC3, and Vrn-D1 showed moderate correlation with PC1 and PC2, both components highly correlating with yield-related traits under studied conditions. The latter one is in line with the previously reported results of [ 35 , 38 , 80 ], which suggested that the presence of the Vrn-D1 allele is directly or indirectly related to a higher yield and the proposed introduction of the Vrn-D1 allele into elite breeding material. The correlation of Vrn-B1 solely with PC3 might indicate a specific role of this allele in the regulation of vegetative period duration under near-ideal greenhouse conditions.…”

Section: Discussionsupporting

confidence: 91%

“…Due to their effect on growth and development, Vrn-1 genes play an important role in wheat adaptation and yield formation in different environments [ 10 , 12 , 37 ]. Therefore, a variety of combinations of Vrn-1 alleles securing wheat adaptability and maturity were determined for different agro-climatic zones [ 38 , 39 , 40 , 41 ]. Thus, according to a survey concerning European spring wheat accessions, the highest average yield per plant was recorded for Vrn-A1 and Vrn-A1+Vrn-B1 genotypes, while early-ripening carriers of all three Vrn-1 dominant alleles suffered a yield penalty [ 34 ].…”

Section: Introductionmentioning

confidence: 99%

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Analysis of the Effects of the Vrn-1 and Ppd-1 Alleles on Adaptive and Agronomic Traits in Common Wheat (Triticum aestivum L.)

Plotnikov,

Klimenko,

Ovchinnikova

et al. 2024

Plants

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Wheat heading time is primarily governed by two loci: VRN-1 (response to vernalization) and PPD-1 (response to photoperiod). Five sets of near-isogenic lines (NILs) were studied with the aim of investigating the effect of the aforementioned genes on wheat vegetative period duration and 14 yield-related traits. Every NIL was sown in the hydroponic greenhouse of the Institute of Cytology and Genetics, SB RAS. To assess their allelic composition at the VRN-1 and PPD-1 loci, molecular markers were used. It was shown that HT in plants with the Vrn-A1vrn-B1vrn-D1 genotype was reduced by 29 and 21 days (p < 0.001) in comparison to HT in plants with the vrn-A1Vrn-B1vrn-D1 and the vrn-A1vrn-B1Vrn-D1 genotypes, respectively. In our study, we noticed a decrease in spike length as well as spikelet number per spike parameter for some NIL carriers of the Vrn-A1a allele in comparison to carriers of the Vrn-B1 allele. PCA revealed three first principal components (PC), together explaining more than 70% of the data variance. Among the studied genetic traits, the Vrn-A1a and Ppd-D1a alleles showed significant correlations with PCs. Regarding genetic components, significant correlations were calculated between PC3 and Ppd-B1a (−0.26, p < 0.05) and Vrn-B1 (0.57, p < 0.05) alleles. Thus, the presence of the Vrn-A1a allele affects heading time, while Ppd-D1a is associated with plant height reduction.

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Section: Discussionsupporting

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Analysis of the Effects of the Vrn-1 and Ppd-1 Alleles on Adaptive and Agronomic Traits in Common Wheat (Triticum aestivum L.)

Plotnikov,

Klimenko,

Ovchinnikova

et al. 2024

Plants

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“…The incorporation of Vrn-D1a has generally been recommended in many spring wheat breeding programs. Van Beem et al (2005) [54] already reported the predominance of the Vrn-D1a allele in CIMMYT elite spring bread wheat lines, and the Japanese wheat cultivar Akakomugi, thought to be the donor parent of this allele [55], was later transferred into early CIMMYT Green Revolution cultivars like Lerma Rojo 64 and Sonora 64. Additionally, the widely grown (8 to 9 million hectares globally) wheat cultivars Pastor, Attila, and Kauz possess Vrn-D1a.…”

Section: Estimations Of the Allele Effects At Major And More Recently Identified Vrn Ppd And Eps Genesmentioning

confidence: 99%

Effect of Flowering Time-Related Genes on Biomass, Harvest Index, and Grain Yield in CIMMYT Elite Spring Bread Wheat

Dreisigacker

Burgueño

Pacheco

et al. 2021

Biology

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Grain yield (YLD) is a function of the total biomass (BM) and of partitioning the biomass by grains, i.e., the harvest index (HI). The most critical developmental stage for their determination is the flowering time, which mainly depends on the vernalization requirement (Vrn) and photoperiod sensitivity genes (Ppd) loci. Allelic variants at the Vrn, Ppd, and earliness per se (Eps) genes of elite spring wheat genotypes included in High Biomass Association Panel (HiBAP) I and II were used to estimate their effects on the phenological stages BM, HI, and YLD. Each panel was grown for two consecutive years in Northwest Mexico. Spring alleles at Vrn-1 had the largest effect on shortening the time to anthesis, and the Ppd-insensitive allele Ppd-D1a had the most significant positive effect on YLD in both panels. In addition, alleles at TaTOE-B1 and TaFT3-B1 promoted between 3.8% and 7.6% higher YLD and 4.2% and 10.2% higher HI in HiBAP I and II, respectively. When the possible effects of the TaTOE-B1 and TaFT3-B1 alleles on the sink and source traits were explored, the favorable allele at TaTOE-B1 showed positive effects on several sink traits mainly related to grain number. The favorable alleles at TaFT3-B1 followed a different pattern, with positive effects on the traits related to grain weight. The results of this study expanded the wheat breeders’ toolbox in the quest to breed better-adapted and higher-yielding wheat cultivars.

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“…The most common vernalization alleles in the project materials were the dominant spring alleles Vrn-D1a, followed by Vrn-B1a. The Japanese cultivar 'Akakomugi' is thought to be the donor parent of the Vrn-D1a allele in CIMMYT wheat [35], which was later transferred into early Green Revolution cultivars like 'Lerma Rojo' and 'Sonora 64.' These two cultivars are also thought to be the potential source of the Vrn-D1a allele in South and Southeast Asian wheat [35,36].…”

Section: Discussionmentioning

confidence: 99%

“…The Japanese cultivar 'Akakomugi' is thought to be the donor parent of the Vrn-D1a allele in CIMMYT wheat [35], which was later transferred into early Green Revolution cultivars like 'Lerma Rojo' and 'Sonora 64.' These two cultivars are also thought to be the potential source of the Vrn-D1a allele in South and Southeast Asian wheat [35,36]. Furthermore, it has been concluded that the highest yield was predicted for varieties containing Vrn-D1a [37].…”

Section: Discussionmentioning

confidence: 99%

Juvenile Heat Tolerance in Wheat for Attaining Higher Grain Yield by Shifting to Early Sowing in October in South Asia

Kumar

Singh

Dreisigacker

et al. 2021

Genes

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Farmers in northwestern and central India have been exploring to sow their wheat much earlier (October) than normal (November) to sustain productivity by escaping terminal heat stress and to utilize the available soil moisture after the harvesting of rice crop. However, current popular varieties are poorly adapted to early sowing due to the exposure of juvenile plants to the warmer temperatures in the month of October and early November. Therefore, a study was undertaken to identify wheat genotypes suited to October sowing under warmer temperatures in India. A diverse collection of 3322 bread wheat varieties and elite lines was prepared in CIMMYT, Mexico, and planted in the 3rd week of October during the crop season 2012–2013 in six locations (Ludhiana, Karnal, New Delhi, Indore, Pune and Dharwad) spread over northwestern plains zone (NWPZ) and central and Peninsular zone (CZ and PZ; designated as CPZ) of India. Agronomic traits data from the seedling stage to maturity were recorded. Results indicated substantial diversity for yield and yield-associated traits, with some lines showing indications of higher yields under October sowing. Based on agronomic performance and disease resistance, the top 48 lines (and two local checks) were identified and planted in the next crop season (2013–2014) in a replicated trial in all six locations under October sowing (third week). High yielding lines that could tolerate higher temperature in October sowing were identified for both zones; however, performance for grain yield was more promising in the NWPZ. Hence, a new trial of 30 lines was planted only in NWPZ under October sowing. Lines showing significantly superior yield over the best check and the most popular cultivars in the zone were identified. The study suggested that agronomically superior wheat varieties with early heat tolerance can be obtained that can provide yield up to 8 t/ha by planting in the third to fourth week of October.

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Geographic distribution of Vrn-genes in landraces and improved varieties of spring bread wheat

Cited by 43 publications

References 5 publications

Analysis of the Effects of the Vrn-1 and Ppd-1 Alleles on Adaptive and Agronomic Traits in Common Wheat (Triticum aestivum L.)

Analysis of the Effects of the Vrn-1 and Ppd-1 Alleles on Adaptive and Agronomic Traits in Common Wheat (Triticum aestivum L.)

Effect of Flowering Time-Related Genes on Biomass, Harvest Index, and Grain Yield in CIMMYT Elite Spring Bread Wheat

Juvenile Heat Tolerance in Wheat for Attaining Higher Grain Yield by Shifting to Early Sowing in October in South Asia

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