Doctoral thesis summary of agriculture: Research and application of molecule markers in breeding salt-tolerant Bacthom 7 rice variety

Objectives: Identifying the salinity tolerance and phenotype of the rice lines which carrying the Saltollocus (donor plant), imported from International Rice Research Institute, as well as selecting the popularly grown rice cultivar were used as the recipient plant Applying marker assisted backcrossing (MABC) to pyramid salinity tolerance Saltol locus into Bac Thom 7, in order to generate the high quality rice variety with salinity tolerance for growing the coastal areas in Red River Delta.
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Doctoral thesis summary of agriculture: Research and application of molecule markers in breeding salt-tolerant Bacthom 7 rice variety MINISTRY OF EDUCATION MINISTRY OF AGRICULTURE AND TRAINING AND RURAL DEVELOPMENT VIETNAM ACADEMY OF AGRICULTURAL SCIENCES DONG THI KIM CUC “Research and application of moleculemarkers in breeding salt-tolerant Bacthom 7 rice variety” Major: Genetics and Breeding Code: 62.62.01.11 DOCTORAL THESIS SUMMARY OF AGRICULTURE HaNoi - 2014The Doctoral thesis was completed in: VIETNAM ACADEMY OF AGRICULTURAL SCIENCESSupervisos: 1. Assoc.Prof. Le Huy ham 2. Dr. Le Hung LinhObjection1:Objection2:Objection3:The Doctoral thesis is defelded at Institute Committee of PhDDissertation Examination: VIETNAM ACADEMY OF AGRICULTURAL SCIENCESAt……day…….month …………..2014PhD thesis can be found at:- Nationa Library of VietNam.- Library of VietNam Academy of Agricultural Sciences INTRODUCTION1. Imperativeness of the thesis Rice production and yield are significantly losses due to diseases and pests infestation and theenvironmental impacts. Of these, the noticeable factor is salt-influenced to rice. The cultivated landshave been affected from the salinity by 380 million ha, accounted for 1/3 total worldwide cultivatedareas.Salt – affected lands is the main factor which has curbed to develop productivity of rice, and alsocaused influence to food security in general. Hence, to reduce the salinity affect to the rice plant haspaid much attention to research [124]. To meet this demand, to generate the salinity tolerance rice variety is necessary work. It isneeded to explore the natural plant resource against salinity tolerance by either directly selecting orby genetic selection, or marker assisted selection. Application of molecular markers may help toidentify the present of salinity tolerance gene(s), which is very useful for the breeder to select theeffective crossed combination. Hence, It would be accelerated to breed rice salinity tolerance,shortened the selection time, and expenses and labour. As aforementioned, the topic entitled“Application the molecular markers to improve salinity tolerance of Bac Thom 7”2. Objectives2.1. General objectives Study on evaluating and developing some salinity tolerance of rice which derived from the theIRRI and India, and some grown rice varieties in Vietnam were used in this thesis. Applying marker assisted backcrossing to improve salinity tolerance of rice which are adaptedfor the Red River Delta.2.2. Specific Objectives Identifying the salinity tolerance and phenotype of the rice lines which carrying the Saltollocus (donor plant), imported from International Rice Research Institute, as well as selecting thepolularly grown rice cultivar were used as the receipient plant Applying marker assisted backcrossing (MABC) to pyramid salinity tolerance Saltol locusinto Bac Thom 7, in order to generate the high quality rice variety with salinity tolerance for growingthe coastal areas in Red River Delta3. Scientific and Practical Significance3.1. Scientific Significance 1Based on the successful archivements of application of marker assisted backcrossing to transfersalinity tolerance QTL into other rice varieties will be widely applied for rice breeding to cope withclimate change in the foreseeable future.Application of molecular breeding to combine with the traditional breeding to accelerate and identifythe salinity tolerance rice materials, to pyramid it into Bac Thom 7 which could help to overcome theconstrains of traditional breeding, especially with the heterzygote salinity tolerance QTL, reducingthe cost of experiments, shortening the time and rapidly applying in practice.3.2. Practical Significance The success of Saltol transfering into Bac Thom 7 based on molecular breeding will be widelyapplied for rice molecular breeding. The improved Saltol salinity tolerance of Bac Thom 7 lines would be selected and grown in alarger scale, especially for the coastal areas in the north of Viet Nam, where the most adversedinfluence from the climate change are. The most other significance of the current thesis was to simultaneously develop the salinitytolerance line/variety with the highest genetic background of the Bac Thom 7 and carried the SaltolQTL. The newly improved lines would grow well in the salt areas.4. Plant materials and the Scope study of thesis4.1. Plant materials to study The inbred rice varieties carrying the salinity tolerance (Saltol) which were imported from theIRRI, and the inbred rice varieties are popularly grown in Vietnam, as ...