Acta Agriculturae Boreali-Sinica ›› 2023, Vol. 38 ›› Issue (2): 43-50. doi: 10.7668/hbnxb.20193558

Special Issue: Multigrain crops Biotechnology Hot Article

Previous Articles     Next Articles

Gene for Tiller Height Regulation and Its Expression Analysis in Sorghum

WANG Rui, CHENG Qingjun, WANG Huiyan, JU Lan, PING Jun'ai, ZHANG Fuyao   

  1. Sorghum Research Institute,Shanxi Agricultural University,Key Laboratory of Genetic and Germplasm Innovation in Sorghum for Shanxi Province,Jinzhong 030600, China
  • Received:2023-01-20 Published:2023-04-28

Abstract:

Tiller higher than main stem is one of the important reasons that make the uniformity of sorghum varieties and mechanized production of sorghum complicated.In order to clarify the mechanism of the gene that regulates the tiller height in sorghum,improve the uniformity of sorghum varieties and breed sorghum varieties suitable for mechanized production,based on the mapping results of our previous studies,15 of the sorghum variety whose tiller height was consistent with main stem height as well as 17 of the sorghum variety whose tiller height was higher than main stem height,were selected to form the natural population to have the candidate genes tested.It was found that it was the SNP3 locus belonging to the gene Sobic.009G2133001.v3.2 located in the conserved domains of Hydrolase_4 affects the tiller height,it was named SbTH.With two sorghum varieties K35-Y5 and 1383 taken as material,the expression patterns of gene SbTH in different sorghum tissues were analyzed by Real-time fluorescence quantitative PCR.The results showed that the SbTH gene got expressed in both the roots and the leaves.Though the expression levels were different,the trends were basically the same.In the stem of variety 1383 whose tiller was higher than main stem,the expression level and trend were almost the same.Only in variety K35-Y5 whose tiller height was consistent with main stem height,at anthesis of main stem,reverse expression pattern was observed.While the expression level of main stem reached the maximum,the expression level of tiller was lowered to the minimum.From above results,we concluded that the expression level of SbTH was low in the tiller of K35-Y5,thus the overgrowth of the tiller internodes got controlled,forming the plant phenotype whose stem and tiller had the same height.The expression level of SbTH was high in the tiller of variety 1383,thus the growth of tiller internodes was promoted,which made the tiller be higher than the stem.Therefore,it is believed that the differential expression of gene SbTH at anthesis of main stem is the key to tiller height regulation.

Key words: Sorghum, Tiller height, Quantitative expression

Cite this article

WANG Rui, CHENG Qingjun, WANG Huiyan, JU Lan, PING Jun'ai, ZHANG Fuyao. Gene for Tiller Height Regulation and Its Expression Analysis in Sorghum[J]. Acta Agriculturae Boreali-Sinica, 2023, 38(2): 43-50. doi: 10.7668/hbnxb.20193558.

share this article