Resistance of new tomato initial material to increased temperature
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MIHNEA, Nadejda, LUPASHKU, Galina A., KRISTYA, N.. Resistance of new tomato initial material to increased temperature. In: Тенденции развития агрофизики: от актуальных проблем земледелия и растениеводства к технологиям будущего: . Посвящено памяти академика Е.И. Ермакова, Ed. 2, 2-4 octombrie 2019, St. Petersburg. St. Petersburg, Russia: ФГБНУ АФИ, 2019, Ediția 2, pp. 440-445. ISBN 978-5-905200-40-3.
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Тенденции развития агрофизики: от актуальных проблем земледелия и растениеводства к технологиям будущего
Ediția 2, 2019
Conferința "Тенденции развития агрофизики: от актуальных проблем земледелия и растениеводства к технологиям будущего"
2, St. Petersburg, Rusia, 2-4 octombrie 2019

Resistance of new tomato initial material to increased temperature


Pag. 440-445

Mihnea Nadejda, Lupashku Galina A., Kristya N.
 
Institute of Genetics, Physiology and Plant Protection
 
Disponibil în IBN: 16 februarie 2022


Rezumat

The article presents data on the reaction of different varieties and tomato lines of different  ecological  and  geographical  origin  to  stressful  temperatures  (35,  38,  42°C).  The  parameters of the effect estimation were the length of the embryonic root and the stalk length. Was  revealed a significant differentiation of the reaction of tomato genotypes to the specified  temperature. A strong inhibition under the action of 35°C was detected only in  the  L11  line   (–27,1),  and  at  380°C  in  L310  (–15,0%).  Under  the  influence  of  a temperature of 42°C,  pronounced suppression of root growth occurred in the majority of the  studied  genotypes.  Under   the  influence  of  stressful  temperatures,  the  genotypes showed a rather differentiated  reaction and a high variability of the trait stalk length: in 19  cases  inhibition  occurred   –5,5%...–31,1%),  and  in  11  cases  –  stalk  growth  was stimulated (+3,3%...+32,2%). Strong  inhibition under the action of 38°C was noted in the genotypes   Mariuca   (–28,4%),   L11    (–22,8%);   450C   –   Pontina   (–25,0%),   Flacara (–23,9%), Florina (–25,8%), Mariuca (–31,1%),  L11 (–25,6), L71 (–6,5%). As a result of cluster analysis, Flacara  and Mary Gratefully genotypes were identified with the least sensitivity  to the indicated stress temperatures, which is very important for their inclusion in breeding programs as potential donors of resistance to heat.