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Genome-Wide Association Study of Nitrogen Use Efficiency and Agronomic Traits in Upland Rice 被引量:1
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作者 Tatiana Rakotoson Julie Dusserre +8 位作者 Philippe Letourmy Julien Frouin Isabelle Ramonta Ratsimiala noronirina victorine rakotoarisoa Tuong-Vi CAO Kirsten Vom Brocke Alain Ramanantsoanirina Nourollah Ahmadi Louis-Marie Raboin 《Rice science》 SCIE CSCD 2021年第4期379-390,I0027-I0034,共20页
Genome-wide association study(GWAS)was performed for 16 agronomic traits including nitrogen use efficiency(NUE)and yield-related components using a panel of 190 mainly japonica rice varieties and a set of 38390 single... Genome-wide association study(GWAS)was performed for 16 agronomic traits including nitrogen use efficiency(NUE)and yield-related components using a panel of 190 mainly japonica rice varieties and a set of 38390 single nucleotide polymorphism(SNP)markers.This panel was evaluated under rainfed upland conditions in Madagascar in two consecutive cropping seasons with two contrasted nitrogen input levels.Using another set of five grain traits,we identified previously known genes(GW5,GS3,Awn1 and Glabrous1),thus validating the pertinence and accuracy of our datasets for GWAS.A total of 369 significant associations were detected between SNPs and agronomic traits,gathered into 46 distinct haplotype groups and 28 isolated markers.Few association signals were identified for the complex quantitative trait NUE,however,larger number of quantitative trait loci(QTLs)were detected for its component traits,with 10 and 2 association signals for nitrogen utilization efficiency and nitrogen uptake efficiency,respectively.Several detected association signals co-localized with genes involved in nitrogen transport or nitrogen remobilization within 100 kb.The present study thus confirmed the potential of GWAS to identify candidate genes and new loci associated with agronomic traits.However,because of the quantitative and complex nature of NUE-related traits,GWAS might have not captured a large number of QTLs with limited effects. 展开更多
关键词 genome-wide association study nitrogen use efficiency agronomic trait upland rice
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Induced Mutation for Developing Mutant Rice Lines Tolerant to the Parasitic Weed Striga asiatica (L.) Kuntze
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作者 noronirina victorine rakotoarisoa Harimialimalala Jhonny Rabefiraisana +5 位作者 Lydia Razafinirina Berthe Rasoamampionona Xavier Roland Rakotonjanahary Abdelbagi Ali Ghanim Mukhtar Ljupcho Jankuloski Alice Andrianjaka 《Journal of Environmental Science and Engineering(A)》 2019年第5期181-192,共12页
This work aims to screen mutant rice lines tolerant to Striga asiatica.Two rainfed sensitive rice varieties B22 and F154 were used.Plants survival rates of the two parents were significantly lower respectively(9.74a a... This work aims to screen mutant rice lines tolerant to Striga asiatica.Two rainfed sensitive rice varieties B22 and F154 were used.Plants survival rates of the two parents were significantly lower respectively(9.74a and 11.83a)than those of mutant lines(55.36c to 74.36b);Striga plants emergence/pot were significantly higher for the parents(13.96c and14.89c)compared to the mutants(0.12a to 1.5b);the infection rate of parents(7.37b;7.86b)was higher compared to the mutants(2.27a to 2.74a);fertility rate/plant of parents was lower(20.98%b;22.29%b)but much higher than mutants(72.19%b to 78.35%b);the average panicle number/plant of parents was significantly lower(0.5a;1a)than those of mutants(1.5b to 2.4bc)and the 100 g grain weight of parents are lower(2.35a;2.56a)than those of mutants(3.19b to 3.23b).The culture of those mutant lines may increase rice production and contribute to enhancing food security in Madagascar. 展开更多
关键词 Induced mutation MUTANT TOLERANT LINES RICE (Oryza SATIVA L.) parasitic weed STRIGA asiatica (L.) Kuntze.
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