Influence of osmotic and salt stress on some quantitative characteristics of maize hybrids
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581.14.032.3:633.15 (1)
Fiziologia plantelor (522)
Cereale. Recolte de grâne (676)
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CLIMENCO (CRAVCENCO), Oxana. Influence of osmotic and salt stress on some quantitative characteristics of maize hybrids. In: International Congress of Geneticists and Breeders from the Republic of Moldova, Ed. 11, 15-16 iunie 2021, Chişinău. Chișinău, Republica Moldova: Centrul Editorial-Poligrafic al Universităţii de Stat din Moldova, 2021, Ediția 11, p. 82. ISBN 978-9975-933-56-8. DOI: https://doi.org/10.53040/cga11.2021.060
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International Congress of Geneticists and Breeders from the Republic of Moldova
Ediția 11, 2021
Congresul "International Congress of Geneticists and Breeders from the Republic of Moldova"
11, Chişinău, Moldova, 15-16 iunie 2021

Influence of osmotic and salt stress on some quantitative characteristics of maize hybrids

DOI: https://doi.org/10.53040/cga11.2021.060
CZU: 581.14.032.3:633.15

Pag. 82-82

Climenco (Cravcenco) Oxana
 
Institute of Genetics, Physiology and Plant Protection
 
Disponibil în IBN: 16 iunie 2021


Rezumat

Purpose: to evaluate the resistance of double hybrids of corn to drought and chloride salinization. Method: 6 double corn hybrids, osmotic solutions (pressure value 2.92-10.5 MPa) and NaCl solutions (pressure value 2.23-3.84 MPa) were used for the study. At the early stages of plant development, indicators of such characters as "seed germination", "seedling length", "root length" were taken into account. In the field, the variability of the signs "panicle length" and "number of tassel branches " was studied. At the haploid level, the indicators of the "pollen grain diameter" trait were determined under stressful conditions. The experiments were carried out according to the requirements of the analysis of variance. Results: at the early stages of plant development, the variability of the studied traits significantly depended on the "genotype" factor . The highest coefficient of determination was found for the character "seed germination" (R2=0.6077**), and the indicators of the same coefficient of the characters "seedling length", "root length" were lower - 0.2733** and 0.3433**, respectively. The hybrids (A285xP165)x(MK01xW47) and (Mo17xP165)x(MK01xW47) were significantly characterized by the highest indicators of the signs "seed germination" and "root length". It should be noted that the variability of the traits "panicle length" and "number of tassel branches" significantly depended on the factor "genotype". The value of the determination coefficient was higher for the "panicle length" character. The hybrids (A285xP165)x(MK01xW47) and (A285xP165)x(MK01xL276) were identified according to the significantly highest values of these characteristics. The variability of the trait "pollen grain diameter" significantly depended on the factors "genotype" (24,75%***), "stress (osmotic and salt)" (10.3%***) and from their interaction (13.83%***). The total coefficient of determination was 0.4041***. The highest average values of the studied trait (under conditions of osmotic and salt stress) were in hybrids (Mo17xP165) x (MK01xW47) and (XL12xP165) x(MK01xW47). It is particularly necessary to highlight the hybrid (A285xP165)x (MK01xL276), which significantly exceeded the control under both osmotic stress and salt stress. Conclusions: the hybrid (A285xP165)x(MK01xW47) was found to be the most resistant to stress at the plant level, and the hybrid (A285xP165)x(MK01xL276) was found at the haploid level. In general, the resistance of the male gametophyte was higher to osmotic stress than to salt stress.