QTL Localization and Analysis on Yield and Related Factors of Sorghum × Sudan Grass

doi:10.7668/hbnxb.2007.04.019

Abstract

Abstract: Molecular genetic map were constructed on many crops and main agronomic characters were located on the chromosomes with QTL, the research had done little on the grass. In order to get high yield, the individual biomass and related factors (height, tillers and leaves number) were located on the chromosomes and analyzed genetic effect with QTLs. The heterotic vigor was discussed. The mapping population derived from Sorghum×Sudan grass (314A ZKSD) F_2:3 family, 248 indivduals were sampled, and with AFLP and RAPD markers to construct which covered 10 linkage groups with 836 cM distance. The average distance between markers were 4.98 cM. The software Joinmap/QTL4.0 were used for statistics analysis. The 19 QTLs were tested on 8 linkage groups. No. 1 and No. 3 linkage group covered 4 and 3 QTLs separately. Single QTLs explain 5.20%-51.50% phenotype difference. In the 19 QTLs, 1 QTL (5.26%) express the additive effect, 3 QTLs (15.79%) had partly dominant effect, 6 QTLs (31.58%) had dominant effect, 9 QTLs (47.36%) had super dominant effect. In showed super dominant effect and dominant effect had main action in Sorghum×Sudan heterotic basis.

Key words: Sorghum×, Sudan grass, Genetic map, Yield character, Molecular marker, QTL localization

CLC Number:

LU Xiao-ping, YUN Jin-feng, XIAO Yu-hong, MI Fu-gui, LI Mei-na, YIN Li. QTL Localization and Analysis on Yield and Related Factors of Sorghum × Sudan Grass[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2007, 22(4): 80-85. doi: 10.7668/hbnxb.2007.04.019.

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