QUANTITATIVE TRAIT LOCI
; ORYZA-SATIVA L.
; INDUCED SPIKELET STERILITY
; REPRODUCTIVE DEVELOPMENT
; GENOTYPIC VARIATION
; GENETIC-STRUCTURE
; HEAT TOLERANCE
; MAPPING QTLS
; MAJOR QTL
; IDENTIFICATION
WOS学科分类:
Agronomy
; Plant Sciences
WOS研究方向:
Agriculture
; Plant Sciences
英文摘要:
Low temperature stress severely hampers rice productivity, and hence elaborating chilling-mediated physiochemical alterations and unravelling cold tolerance pathways will facilitate cold resilient rice breeding. Various cold tolerant Near-isogenic lines (NILs) selected at the booting stage through backcrossing of a japonica landrace Lijing2 (cold tolerant) with cold sensitive Towada (a japonica cultivar). The cold tolerance attributes of NILs was validated over two years by evaluating the spikelet fertility followed by correlation of nineteen morphological traits with the rate of seed setting (RSS). Results revealed BG, FG, 1-2IL, RSLL, and UIL were significantly correlated with RSS and had nearer marker interval distance with cold tolerance in QTL analysis. Two QTLs, qCTB-7-a and qCTB-7-b, were found for RSS based on a mixed linear model. Alleles of two QTLs were contributed by Lijing2 and genetic distances between the peaks were 0.00 and 0.06cM, which explained 5.70% and 8.36% variation, respectively, One QTL for 1-2IL, RSLL, and ILBS, while two QTLs for FG, BG, and UIL were also identified. These findings can be exploited to engineer low temperature stress tolerant rice in times of climate change.
1.Southwest Forestry Univ, Sch Hort & Gardening, Kunming 650224, Yunnan, Peoples R China 2.Yunnan Agr Univ, Coll Agron & Biotechnol, Kunming 650201, Yunnan, Peoples R China 3.Yunnan Prov South & Southeast Asia Joint R&D Ctr, Kunming 650224, Yunnan, Peoples R China 4.Yunnan Prov Int Technol Cooperat Base High Effect, Kunming 650224, Yunnan, Peoples R China 5.Yunnan Acad Agr Sci, Biotechnol & Germplasm Resources Inst, Agr Biotechnol Key Lab Yunnan Prov, Kunming 650205, Yunnan, Peoples R China 6.Fed Urdu Univ Arts Sci & Technol, Dept Biotechnol, Karachi 75300, Pakistan 7.Univ Karachi, Karachi Inst Biotechnol & Genet Engn, Karachi 75270, Pakistan 8.Zhejiang Forestry Univ, Sch Forestry & Biotechnol, Hangzhou 311300, Zhejiang, Peoples R China
Recommended Citation:
Sun, Zhenghai,Du, Juan,Pu, Xiaoying,et al. Near-Isogenic Lines of Japonica Rice Revealed New QTLs for Cold Tolerance at Booting Stage[J]. AGRONOMY-BASEL,2019-01-01,9(1)