Perspectives of moldovan sorghum breeding for salt resistance
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2023-11-28 08:23
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631.524.85:633.174(478) (1)
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ROTARI, Eugen, DREGLEA, Mihai, FRATEA, Svetlana. Perspectives of moldovan sorghum breeding for salt resistance. In: Natural sciences in the dialogue of generations, 14-15 septembrie 2023, Chişinău. Chişinău: Centrul Editorial-Poligrafic al USM, 2023, p. 64. ISBN 978-9975-3430-9-1.
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Natural sciences in the dialogue of generations 2023
Conferința "Natural sciences in the dialogue of generations"
Chişinău, Moldova, 14-15 septembrie 2023

Perspectives of moldovan sorghum breeding for salt resistance

CZU: 631.524.85:633.174(478)

Pag. 64-64

Rotari Eugen, Dreglea Mihai, Fratea Svetlana
 
Institute of Crop Science "Porumbeni"
 
Proiecte:
 
Disponibil în IBN: 18 octombrie 2023


Rezumat

Salinizationis a great ecological problem in the world. The supraface of them in agriculture is more 6%. Also the 20% irigation soils have secondary salinization proces. Like the whole world this problem has place in our coiuntry. There are some way for it solution. One of them is the introduction of salt rezistant cultures. Is known, the local varieties are more adaptive for enviroment.That's why moldavian sorghum genofond is coresponded for soil-climatic conditions of Republic of Moldova, too.In Republic of Moldova The sorghum researches have been implemented in Republic of Moldovasince 1974, when the Science Research Institute of Corn and Sorghum (today Institute of Crop Plants ”Porumbeni”) was created.All sorghum research realized in Republic of Moldova, including the sorghum cultures breeding, had been concentrated here. The base of successful researches period was prezented by closed cycle from creation to production of seed material of this culture and the technological support of new moldovan hybrids and varieties. Unfortunately, the physiological researches of different stress conditions in this period had not realized and reflected on introduction of sorghum in Moldova in long perspective. This direction was not continuedafter the sorghum breedingtransfer to Institute of Plant Protection subordinated by Moldovan Academy of Science at 2006. That's why, after recovery at 2021the sector of sorghum cultures in ICS “Porumbeni”, the physiological researches of different stress conditions have been begun. The problem of salt resistant is one from them. Thus,the study of the genetic diversity of sorghum for salt tolerance is actually. The aim of presented research is evaluation of different local sorghum varieties, lines and hybrids on salt resistance. The research objects are 2 varieties, 4 lines and 4 hybrids moldovan sorghum breeding. The salt stres had been realizated by 0,4 N NaCl solution.For the adequate interpretation was proposed the salt resistant coefficinet (SRC), namely:the raport of germination in 0,4 N NaCl on germination in H2O. The results obtained indicate an ambiguous response of sorghum cultures to salt stress. This reaction îs depending on the genotype. The sorghum lines have the largest range of salt resistancevariability. The second place of it have sorghum hybrids with indicated decrease ofsalt resistance variability. The great interes has the SRC using. It gives a possibility for optimization of salt resistant evaluation of different sorghum genotypes.Thus, sorghum lines are the best initial material with large range of theirsalt resistant variability for sorghum breeding. Thus, the following conclusions should be drawn based on the obtained results: 1.The presented research indicate the need to study salt tolerance by comparative assessment of the salt tolerance variability degree of homozygous and heterozygous sorghum forms according to the dynamics of increasing the range of salt concentrations corresponding to the natural level of soil salinity. 2. The sorghum lines have thelargest range of salt resistance variability. There is the valuable fact for sorghum salt resistance breeding. 3. Sorghum heterozygous forms have limited potential of salt resistance. 4.The SRC coefficient is very useful in breeding programs for creation the salt-tolerant sorghum. This parameter allows optimizing the comparative potential of salt tolerance for different sorghum genotypes.

Cuvinte-cheie
sorghum, salt resistance, Lines, Hybrids