Progress on Genetic Research of Sorghum Grain Weight

doi:10.13560/j.cnki.biotech.bull.1985.2019-0105

Abstract

Abstract: Sorghum is the fifth largest cereal crop in the world. Breeding high-yielding varieties of sorghum is of great significance on alleviating food security in the world. Grain weight is an important component of crop yield,increasing grain weight is an effective way in the improvement of sorghum yield. Grain weight is a complex trait controlled by quantitative trait loci（QTL）. At present,some QTLs controlling grain weight in sorghum have been located on the genetic map,which distribute on the all 10 chromosomes of sorghum. In this paper,the genetic characteristics,the influencing factors and the research progress of QTL mapping for sorghum grain weight were summarized,and the detected QTLs were compared and analyzed. The homologous genes of grain weight related genes already cloned in rice and maize were searched in sorghum genome and compared with the mapping intervals of sorghum grain weight QTLs,aiming at providing a basis for marker-assisted breeding and fine mapping or cloning of major QTLs for sorghum grain weight.

Key words: sorghum, grain weight, genetic analysis, gene mapping, quantitative trait loci

HAN Li-jie, CAI Hong-wei. Progress on Genetic Research of Sorghum Grain Weight[J]. Biotechnology Bulletin, 2019, 35(5): 15-27.

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