Identification of main-effect quantitative trait loci (QTLs) for low-temperature stress tolerance germination- and early seedling vigor-related traits in rice (Oryza sativa L.)

• DOI: 10.1007/s11032-019-1090-4
• Publication Date: 2020-01-04T11:03:04Z
• Authors: S. Najeeb; J. Ali; A. Mahender; Y.L. Pang; J. Zilhas; V. Murugaiyan; Lakshminarayana R...; Z. Li
• Keywords: Introgression

Abstract An attempt was made in the current study to identify main-effect and co-localized quantitative trait loci (QTLs) for germination early seedling growth traits under low-temperature stress (LTS) conditions rice. The plant material used this an backcross population of 230 introgression lines (ILs) BC I F 7 generation derived from Weed Tolerant Rice-1 (WTR-1) (as recipient) Haoannong (HNG) donor). Genetic analyses LTS tolerance revealed a total 27 (M-QTLs) mapped on 12 chromosomes. These QTLs explained more than 10% phenotypic variance (PV), average PV 12.71% while employing 704 high-quality SNP markers. Of these distributed chromosomes, 11 were associated with (LTG), nine index (LTGS), five root length (RLSI), two biomass (BMSI) QTLs, shoot (SLSI) seven seed vigor (SVI), single QTL (RL). Among them, significant major ( qLTG(I) 1 , qLTGS(I) 1–2 5 ) chromosomes 1, 5, LTG LTGS ranged 16 23.3%. genomic regions six QTLs. Most stage-specific found harbor governing multiple traits. Eight had four clustered together designated as promising qLTTs ), qLTT 2 3 6 8 9 . A putative candidate genes identified M-QTLs different Overall, are responsible suggested that could serve best predictors at stages. Furthermore, it is necessary fine-map find functional markers marker-assisted selection rice breeding programs cold tolerance.