Inicio  /  Agriculture  /  Vol: 13 Par: 3 (2023)  /  Artículo
ARTÍCULO
TITULO

Contribution of Agro-Physiological and Morpho-Anatomical Traits to Grain Yield of Wheat Genotypes under Post-Anthesis Stress Induced by Defoliation

Vesna Kandic    
Jasna Savic    
Dragana Rancic and Dejan Dodig    

Resumen

Post-anthesis drought affects wheat production worldwide, primarily through the limitation of grain filling. The enhanced remobilization of stem reserves induced by drought can provide considerable carbon sources for grain filling. The aim of this study, which was part of an ongoing wheat-breeding program targeting drought tolerance, was to assess the ability of 20 contrasting common wheat genotypes (2 cultivars, 8 F6:7 families (FAM), and 10 parent genotypes (PAR) used to make the families) to remobilize stem dry matter under water-stressed conditions simulated via defoliation 10 days after anthesis, and to estimate the contribution of stem dry matter remobilization to grain weight. In two-year field trials, the genotypes were scored for agro-physiological and peduncle morpho-anatomical traits. Stem reserve contribution to grain weight per spike was significantly enhanced in defoliated plants but did not differ amongst the groups of genotypes. F6:7 families had higher grain-filling rate and 1000-grain weight but without improvement in grain weight per spike under defoliation compared with parental groups. The total area of chlorenchyma, phloem-area-related traits, and stem reserve contribution to grain weight were positively associated with grain weight per spike under defoliation, whilst in both treatments, the grain-filling rate was determined by stem height. These results imply that the grain-filling rate is a trait desirable for drought tolerance that can be improved during the breeding process.

Palabras claves

 Artículos similares

       
 
Kristýna Balá?ová, Jitka Kumhálová and Jan Chyba    
With the changing climate, there is an increasing emphasis on drought-resistant varieties, including the ability to maintain quality production. As there is also interest in ancient wheat varieties, the aim of this study was to evaluate the growth parame... ver más
Revista: Agronomy

 
Huifang Wang, Bangbang Yang, Xinyu Zhao, Hailong Chen, Fei Liu, Yating Ru, Xirui Wei, Xiaofeng Fu, Weiwei Guo, Ximei Li, Nataliia Golub and Yumei Zhang    
Root architectural traits at the seedling stage have been demonstrated to be crucial for the efficient uptake of nutrients and drought tolerance in wheat. To dissect the genetic basis of these traits from the D genome, 182 recombinant inbred lines (RILs)... ver más
Revista: Agronomy

 
Ruisi Yang, Fei Wang, Ping Luo, Zhennan Xu, Houwen Wang, Runze Zhang, Wenzhe Li, Ke Yang, Zhuanfang Hao and Wenwei Gao    
The highly conserved actin depolymerizing factor (ADF) plays an important role in plant growth, development and responses to biotic and abiotic stresses. A total of 72 ADF genes in Arabidopsis, wheat, rice and sorghum can be divided into four groups. The... ver más
Revista: Agronomy

 
Koffi Pacome Kouame, Raj Kishan Agrahari, Noren Singh Konjengbam, Hiroyuki Koyama and Yuriko Kobayashi    
Abiotic stress is a major cause of the declining crop yield worldwide, especially in tropical agricultural areas. Meeting the global food demand has become a serious challenge, especially in tropical areas, because of soil acidity, Al and Fe toxicity, dr... ver más
Revista: Agriculture

 
Valya Vassileva, Mariyana Georgieva, Grigor Zehirov and Anna Dimitrova    
Drought stress imposes substantial constraints on the growth and production of wheat (Triticum aestivum L.), a globally important cereal crop essential for food security. To mitigate these adverse effects, researchers are intensifying their efforts to co... ver más
Revista: Agriculture