Fig 1.
Flow chart of population development for QTL analysis.
Fig 2.
Graphic genotype of the selected advanced backcross individuals.
The grey and black regions of the chromosomes indicate the homozygous segments from Nipponbare and HR1128 respectively. The hatched regions of the chromosomes indicate the heterozygous areas.
Table 1.
Descriptive statistics and frequency distributions of panicle related traits in populations and parents.
Fig 3.
Field performance comparison between parents and distribution of yield components in the backcross populations.
(A) Panicle shape comparison between R1128 and Nipponbare. The P1 and P2 represent Nipponbare and HR1128 respectively. Scale bar: 5 cm. (B) Panicle length. (C) Grain number per panicle. (D) Primary branch number. (E) Secondary branch number.
Table 2.
Correlation coefficients among four panicle traits, GN, PL, PBN and SBN for BIL152 (upper), BIL196a (secondary), BIL196b (tertiary) and BIL196b-156 (lower) populations.
Table 3.
QTL analysis of panicle related traits in populations.
Table 4.
Comparison and analysis of QTLs for panicle traits in three genetic regions.
Fig 4.
Map position of QTL PL6-5 in the pericentromeric region on chromosome 6.
The abbreviations S6 and L6 denote the short arm and long arm region of chromosome 6 respectively. C6 indicates the centromere region from 13.2 Mb to 17.6 Mb. The physical position of QTL PL6-5 was mapped between 18.2 Mb and 19.5 Mb and this region is close to the centromere, separated by only 600 kb.