Genetic resistance to net form of net blotch in the international barley differential Canadian Lake Shore (CLS) was characterized and mapped. A doubled haploid (DH) population generated from a cross between CLS and susceptible cultivar Harrington was evaluated at the seedling stage using eight diverse
Pyrenophora teres
f.
teres
(
Ptt
) isolates and at the adult stage in the field using natural inoculum. To effectively map the CLS resistance, comparative marker frequency analysis (MFA) was performed using 8,762 polymorphic DArT-seq markers, where ‘resistant’ and ‘susceptible’ groups each comprised 40 DH lines displaying the most extreme phenotypes. Five DArTseq markers were consistently detected in eight disease assays, which was designated
qPttCLS
and deemed to harbor the locus underpinning CLS resistance. Four of these markers were present onto the barley DArTseq physical map and spans a region between 398203862 and 435526243 bp which were found to consist several genes involved in important plant functions such as disease response and signaling pathways. While MFA only detected the 3H region, genetic analyses based on segregation patterns were inconsistent, suggesting complex inheritance or variation in phenotypic expression of
qPttCLS
, particularly in the field. This study represents progress toward connecting
Ptt
pathotype surveys with the corresponding resistance genes in barley differentials. The markers associated with
qPttCLS
are useful for marker-assisted selection in breeding programs.
государственное бюджетное образовательное учреждение высшего образования «Омский государственный аграрный университет им. П.А. Столыпина», Омск, Россия 4 Федеральное государственное бюджетное научное учреждение «Всероссийский научно-исследовательский институт биологической защиты растений», Краснодар, Россия
Background. The issue of acute respiratory infections in children remains one of the most urgent. Therefore, in the pandemic due to the new coronavirus SARS-CoV-2, the search for effective treatment regimens for this disease is necessary.
Aim. To compare the change of clinical symptoms, terms of virus elimination and disease-related economic cost as well as utilization of outpatient healthcare services in children with new coronavirus infection using the herbal medicine Tonsilgon N, oral solution, added to standard therapy.
Materials and methods. A prospective open comparative cohort study of the effectiveness of coronavirus infection treatment in children using the standard of care alone and the standard of care with Tonsilgon N was conducted. Group 1 children (n=720) received the standard therapy for COVID-19 and Tonsilgon N oral solution for 10 days, and group 2 patients (n=670) only received the standard therapy for COVID-19. Treatment efficacy was evaluated according to the change of clinical symptoms in the observed patients, the results of SARS-CoV-2 coronavirus RNA detection in nasopharyngeal smears by polymerase chain reaction, the utilization of healthcare services, temporary disability of parents, the economic cost of the disease.
Results. Studied patients of both groups had a typical clinical presentation of mild to moderate severity new coronavirus infection. Fatigue (96.599.7%) and sore throat (93.893.9%) were the most frequent symptoms. Posterior pharynx hyperemia was noted slightly less frequently. Low-grade fever was noted in 85.786.6% of the patients, equally often in patients of both groups. The significant therapeutic effect of the herbal medicine containing extract of marshmallow root, chamomile flowers, horsetail herb, walnut leaf, yarrow herb, oak bark, and dandelion herb includes reducing the time of sore throat relief in 93.2% of main group patients. After 10 days of treatment, sore throat persisted only in 6.8% of group 1 and 68.1% of group 2 patients (p=0.0001). These results indicate that Tonsilgon combined with standard of care is a promising way to improve the quality of life of children with the new coronavirus infection. The addition of Tonsilgon in therapy for new coronavirus infection in children shortens the time of acute inflammation resolution and reduces the duration of inflammatory intoxication. The therapy of new coronavirus infection under the provisional guidelines leads to a reduction in the time for clinical recovery and virus elimination in children and adolescents (p=0.0001) and a decrease in the utilization of outpatient healthcare services are observed: 3/4 of Group 1 patients and 1/2 of Group 2 patients (p=0.0001) applied for medical help twice during the observation period, 14.6% of Group 1 patients and 29.1% of Group 2 parents applied for medical help more than 3 times (p=0.0001). Thus, the direct and indirect economic costs of the disease decreased. The lower economic cost for parents of children in Group 1 was due to less need for medication and a lower reduction in family income due to temporary disability compared to those for parents in Group 2 (p=0.0001). No treatment-related adverse events was reported.
Conclusion. The above data indicate that Tonsilgon therapy is an affordable way to optimize the treatment of new coronavirus infection in children.
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