Evaluation of cocksfoot (Dactylis glomerata L.) population for drought survival and behavior

Abstract

Climate change models predict frequent and intense droughts in the world. Development of drought-tolerant species and cultivars is necessary to cope with such changes. Forage grass species are affected, especially in the Mediterranean region. The aim of the present study was to investigate the diversity for drought survival, summer dormancy, and productivity within a cocksfoot population.The study was conducted in Morocco, under field conditions from 2011 to 2013. 283 genotypes of cocksfoot and parents were tested, characterized for dry matter yield, heading date, plant height, senescence, summer dormancy, and drought survival. Results exhibited a large variability between traits. 79% of the population had survived after severe drought summer while 57% yielded more than both parents. Also, 63% of the progeny had an intermediate score of summer dormancy estimated by senescence score. Large variability was also noticed for heading date and plant height. Several accessions combined a high yield and persistence under severe summer drought. Which explain the significant correlation (r = 0.18, P < 0.005) founded between total dry matter accumulated in 2013 and plant survival. Accordingly, our results showed that we can rise persistent and resilient genotypes among population with a good level of biomass.

Ranking Species for Veld Restoration in Semi-Arid Regions Using Agronomic, Morphological and Chemical Parameters of Selected Grass Species at Different Developmental Stages under Controlled Environment

“…The current study recorded that T. triandra grass had significantly higher plant height value (135.59 cm) when compared to A. pubescens, C. ciliaris, E. curvula, C. gayana, F. arundinacea, P. maximum and D. glomerata grasses at maturity stage. The results for D. glomerata (57.10 cm) at elongation stage were in line with those reported by Zhouri et al [22] (56.90 cm) and Vasileva et al [23] (30-60 cm) in an open field. The A. pubescens, E. curvula, C. gayana, F. arundinacea, P. maximum, D. eriantha and T. triandra height values are within the range reported by van Oudtshoorn [24] in an open field.…”

Efecto del periodo de recuperación en la producción y calidad nutricional de algunas especies forrajeras

“…En alfalfa, la producción de materia seca es aproximadamente de 12,2 ton ha -1 durante el año [12], en avena de 11,50 a 20,78 ton ha -1 en un periodo de corte de 60 a 70 días [9], en azul orchoro de 4,44 a 108 g/planta con variabilidad por genotipo [13] y entre 0,13 ton ha -1 y 8,04 ± 0,19 ton ha -1 cuando está en mezcla con trébol rojo [14], de modo que los resultados obtenidos alcanzan los rangos reportados, alfalfa con proyección anual de 20,25 ton ha -1 , avena 20,1 ton ha -1 , azul orchoro 7,92 ton ha -1 y vicia 29,2 ton ha -1 .…”

Combinations of Small RNA, RNA, and Degradome Sequencing Uncovers the Expression Pattern of microRNA–mRNA Pairs Adapting to Drought Stress in Leaf and Root of Dactylis glomerata L.

“…As an economically important forage, orchardgrass has been widely cultivated for hay or silage production and grazing, because of its high adaptability, nutrition, shade tolerance, and biomass production [ 33 , 34 ]. In a previous study, some orchardgrass accessions were able to tolerate severe drought and still produce high yields [ 35 ]; however, the drought resistance mechanism remains unclear. Here, we use the drought-tolerant genotype of orchardgrass named “Baoxing”, which originates from Baoxing county in Sichuan [ 36 ], and we integrated transcriptome, miRNAome, and degradome results after water deficit treatment to identify drought-adaptive genes and miRNAs in leaf and root.…”