Submitted to: Crop Science Society of America
Publication Type: Abstract Only
Publication Acceptance Date: 7/11/2022
Publication Date: 11/6/2022
Citation: Burow, G.B., Xin, Z., Hughes, H.J., Hayes, C.M., Chen, J., Payton, P.R. 2022. Genetics of enhanced sink capacity in sorghum. Crop Science Society of America.
Technical Abstract: Sorghum is an integral crop component of climate smart and resilient agricultural systems. However, there is a continuing need to improve sorghum yield for enhanced productivity. A major target trait for sorghum yield improvement is increased grain number. Here, we report on evaluation of sorghum near isogenic lines [introgressed with multiseeded gene 1 and 2 (msd1 and msd2)] that display more than double the seed number in contrast to their wild type counterparts and a commercial check. Field genetic studies indicated that msd1 and msd2 genes have positive effects on harvest index (HI) in RTx430 genetic background, coupled with increased grain size and significant elevation of grain yield /panicle. Meanwhile, BTx399 NILs maintained HI value compared to wild type genetic stock and check. These results demonstrate an interplay between specific gene and overall genetic/physiological background as major consideration for deployment of improved target traits through molecular breeding.