Screening of Drought Tolerance Potential of a Collection of 102 Vietnamese Indica Traditional Rice Varieties

Received: 09-07-2020

Accepted: 30-11-2020

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Issue: Vol. 19 No. 2 (2021)

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NÔNG HỌC

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Giang, H., Linh, T., Toan, D., Huong, V., An, V., Phuong, D., … Gantet, P. (2024). Screening of Drought Tolerance Potential of a Collection of 102 Vietnamese Indica Traditional Rice Varieties. Vietnam Journal of Agricultural Sciences, 19(2), 161–172. http://testtapchi.vnua.edu.vn/index.php/vjasvn/article/view/785

Screening of Drought Tolerance Potential of a Collection of 102 Vietnamese Indica Traditional Rice Varieties

Hoang Thi Giang (*) 1 , Tran Hien Linh 1 , Do Van Toan 1 , Vu Thi Huong 1 , Vu Manh An 1 , Dinh Hong Phuong 1 , Pham Xuan Hoi 1 , Pascal Gantet 2

  • 1 Viện Di truyền Nông nghiệp Việt Nam
  • 2 Université de Montpellier, IRD, UMR DIADE, 34095 Montpellier, Pháp

    • Keywords

    Droughttolerance, Indica, localVietnameserice, rice

    Abstract


    Acollectionof102VietnameseIndicatraditionalricevarietieswere screenedfordroughttoleranceduringthevegetativestagetoselectgenotypeswithhighdroughttoleranceforricebreedingprogram.Underthegreenhouseconditions,six-week-oldplantsweredroughttreatedbystoppingirrigationfor4weeks.Aftereachweekofdroughtstress,leafrelativewatercontent,slopeofleafrelativewatercontentanddroughttolerancescoreweremeasured.Theleafrelativewatercontentremainedhighafteroneweekofdroughtstress,significantlydroppedafter2weeks,slightlydecreasedafter3weeksanddisplayedavaluelessthan23.5%after4weeks.Theslopeofleafrelativewatercontentwasstronglyreducedatthesecondandfourthweeksofdroughttreatment.Afteroneweekofdroughtstress,mostofthegenotypesweretoleranttohighlytolerant.Thelevelofdroughttolerancedippedafter2and3weeksofstress,andnogenotypewithtolerancewasobservedafter4weeksofstress.After2weeksofplantrewatering,therecoveryabilityrangedfrom0-85.2%.Basedontheresultsobtained,13highlypromisingricegenotypeswereselectedforplantwaterstatus,droughttoleranceandrecoveryability,amongthem,G42,G115andG163wereconsideredasthemostpromisingtoleranttodrought.

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