A comparison of root and stem lodging risks among winter wheat cultivars

2003 ◽  
Vol 141 (2) ◽  
pp. 191-202 ◽  
Author(s):  
P. M. BERRY ◽  
J. H. SPINK ◽  
A. P. GAY ◽  
J. CRAIGON
Keyword(s):  
Winter Wheat ◽  
Bending Moments ◽  
Wheat Cultivars ◽  
Lodging Resistance ◽  
Wind Speeds ◽  
Winter Wheat Cultivars ◽  
Related Plant ◽  
The Difference ◽  
Root Lodging ◽  
Stem Failure

Plant characters that determine stem and root lodging were measured on 15 winter wheat cultivars at three UK sites between 2000 and 2002. A model of lodging was used to estimate stem failure wind speeds (resistance to stem lodging) and anchorage failure wind speeds (resistance to root lodging). The degree and type of natural lodging was also recorded in the plots and this correlated well with the stem and anchorage failure wind speeds. Only a weak correlation (R2=0·33) was observed between the stem and anchorage failure wind speeds for the 15 cultivars. This can be explained by the absence of genetic correlation between the plant characters that determine the stem and anchorage strength. There was a significant interaction between type of lodging (stem or root) and cultivar for failure wind speed (P<0·001). This showed that the difference between the resistances for root and stem lodging was not the same for all cultivars. Separate classifications for the stem and root lodging resistance of cultivars are developed that would allow the most appropriate crop management to reduce the risk of both types of lodging. Significant differences were found between cultivars for all lodging-related plant characters (P<0·05). These resulted in the cultivar range of the anchorage failure moment to be 110% of the overall mean. Stem failure moment, shoot and plant base bending moments had ranges of 37–49% of their overall means. Breeders should select for wide, deep root plates and wide stems with a high stem wall failure yield stress for the greatest improvement in lodging resistance.

scholarly journals Adaptation of Winter Wheat Cultivars to Different Environments: A Case Study in Poland

Agronomy ◽  
2020 ◽  
Vol 10 (5) ◽  
pp. 632
Author(s):  
Marzena Iwańska ◽  
Jakub Paderewski ◽  
Michał Stępień ◽  
Paulo Rodrigues
Keyword(s):  
Winter Wheat ◽  
Wheat Yield ◽  
Weather Conditions ◽  
Growth Stages ◽  
Wheat Cultivars ◽  
Weather Factors ◽  
Factors Affecting ◽  
Ancova Model ◽  
Winter Wheat Cultivars ◽  
The Difference

A proper understanding of cultivar adaptation to different environments is of great relevance in agronomy and plant breeding. As wheat is the most important crop in Poland, with a total of about 22% of the total sown area, the study of its performance in environments with different productivity levels for consequent cultivar recommendation is of major importance. In this paper, we assess the relative performance of winter wheat cultivars in environments with different productivity and propose a method for cultivar recommendation, by considering the information of environmental conditions and drought stress. This is performed in the following steps: (1) calculation of expected wheat productivity, depending on environmental factors, (2) calculation of relative productivity of cultivars in the environments, and (3) recommendation of cultivars of a specific type and range of adaptation. Soil and weather conditions were confirmed as the most important factors affecting winter wheat yield. The weather factors should be considered rather in shorter (e.g., 10 day) than longer (e.g., 60 day) time periods and in relation to growth stages. The ANCOVA model with genotype and management intensity as fixed factors, and soil and weather parameters as covariates was proposed to assess the expected wheat productivity in particular environments and the expected performance of each genotype (cultivar). The recommendation of cultivars for locations of specified productivity was proposed based on the difference between the expected cultivar yield and the mean wheat productivity, and compared with the Polish official cultivar recommendation list.

scholarly journals O-linked N-acetylglucosamine transferase is involved in fine regulation of flowering time in winter wheat

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Min Fan ◽  
Fang Miao ◽  
Haiyan Jia ◽  
Genqiao Li ◽  
Carol Powers ◽  
...  
Keyword(s):  
Winter Wheat ◽  
Flowering Time ◽  
Heading Date ◽  
Wheat Cultivars ◽  
Gene Encoding ◽  
Constitutive Overexpression ◽  
Winter Wheat Cultivars ◽  
Fine Regulation ◽  
Trait Locus ◽  
Glcnac Transferase

AbstractVernalization genes underlying dramatic differences in flowering time between spring wheat and winter wheat have been studied extensively, but little is known about genes that regulate subtler differences in flowering time among winter wheat cultivars, which account for approximately 75% of wheat grown worldwide. Here, we identify a gene encoding anO-linkedN-acetylglucosamine (O-GlcNAc) transferase (OGT) that differentiates heading date between winter wheat cultivars Duster and Billings. We clone thisTaOGT1gene from a quantitative trait locus (QTL) for heading date in a mapping population derived from these two bread wheat cultivars and analyzed in various environments. Transgenic complementation analysis shows that constitutive overexpression ofTaOGT1bfrom Billings accelerates the heading of transgenic Duster plants.TaOGT1 is able to transfer anO-GlcNAc group to wheat proteinTaGRP2. Our findings establish important roles forTaOGT1in winter wheat in adaptation to global warming in the future climate scenarios.

Comparative Molecular Analysis of Winter Wheat Cultivars and Their Doubled Haploid Derivatives

2001 ◽  
Vol 29 (1-2) ◽  
pp. 41-48 ◽  
Author(s):  
O. Törjék ◽  
E. Kiss ◽  
K. Mázik-Tőkei ◽  
G. Hutvágner ◽  
D. Silhavy ◽  
...  
Keyword(s):  
Winter Wheat ◽  
Molecular Analysis ◽  
Doubled Haploid ◽  
Wheat Cultivars ◽  
Winter Wheat Cultivars
Sign in / Sign up

Export Citation Format

Share Document