Evaluation of rice breeding lines containing root QTLs under different water management environments

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dc.creatorDeshmukh, Vivek
dc.creatorKamoshita, Akihiko
dc.creatorAmézquita, Nelson
dc.creatorEspinosa, Natalia
dc.creatorOgawa, Satoshi
dc.creatorKitomi, Yuka
dc.creatorUga, Yusaku
dc.date2024
dc.date2025-03-21T07:23:25Z
dc.date2025-03-21T07:23:25Z
dc.date.accessioned2026-06-27T13:25:32Z
dc.descriptionInvestigating effects of introgressed root-trait QTLs in field environments is a challenging task. Seven rice BC3F4 lines with at least one of six QTLs for root vertical distribution (DRO1, DRO2, DRO3, qFSR4, qRL6.1, QRO2) introgressed into a popular Colombian variety, FEDEARROZ 60, were evaluated for changes in root traits together with a BC3F4 line lacking root QTLs and the parent FEDEARROZ 60. A flooded experiment with deep-flooded and shallow-flooded treatments and an aerobic experiment using a raised-bed system were repeated in two seasons in Central Colombia. In the flooded experiment, ST604_302, containing DRO2, showed the highest root weight and root weight proportion in the 20–30-cm soil layer. The average root weight and proportion of roots at the 10–20-cm soil depth and average root weight at the 20–30-cm depth were significantly greater for the lines containing DRO2 than for those without. In the aerobic experiment, the four lines with DRO2 had higher deep-root ratios than the other genotypes. In the aerobic experiment, a higher deep-root ratio did not lead to greater root weight at either depth examined; the root weight parameters showed genotype × season interaction, and genotype had no significant effect on root weight. In the flooded experiment, the four DRO2-introgressed lines showed higher root length density below 10-cm depth than other lines in the deep-flooded treatment but not in the shallow-flooded treatment. These results showed limited but positive changes in deep-root growth in field environments through root-QTL introgression, and revealed interactions with water management and season.
dc.formatapplication/pdf
dc.identifierhttps://hdl.handle.net/10568/173772
dc.identifier.urihttp://hdl.handle.net/123456789/58977
dc.languageen
dc.publisherJapanese Society for Root Research
dc.rightsOpen Access
dc.sourceDeshmukh, V.; Kamoshita, A.; Amézquita, N.; Espinosa, N.; Ogawa, S.; Kitomi, Y.; Uga, Y. (2024) Evaluation of rice breeding lines containing root QTLs under different water management environments. Plant Root 18: p. 22-34. ISSN: 1881-6754
dc.subjectrooting
dc.subjectwater scarcity
dc.titleEvaluation of rice breeding lines containing root QTLs under different water management environments
dc.typeJournal Article

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