摘要
This study was conducted to identify resistance sources against the newly documented pathotypes (P5 and P6) of </span><i><span style="font-family:Verdana;">Sporisorium</span></i> <i><span style="font-family:Verdana;">reilianum</span></i><span style="font-family:Verdana;">, causing sorghum head smut. A subset of 67 sorghum association panel (SAP) accessions, 29 in 2017 and 38 in 2018 along with checks BTx635 (resistant) and BTx643 (susceptible) were screened in the greenhouse against P5 and P6 pathotypes in two separate experiments in both years. At 18 to 20 days after planting, accessions were inoculated by injecting the seedlings below the apical meristem with sporidial suspensions following an established inoculation procedure. Three accessions (PI656091, PI533919, and PI533821) in 2017 </span><span style="font-family:Verdana;">and 17 accessions (PI597961, PI656071, PI656048, PI576435, PI534075, PI534145,</span><span style="font-family:Verdana;"> PI656057, PI576437, PI651492, PI656014, PI656025, PI655999, PI656010, PI656082, PI534123, PI533927, PI656100) in 2018 were identified as potential resistant sources to both P5 and P6 pathotypes of </span><i><span style="font-family:Verdana;">S.</span></i> <i><span style="font-family:Verdana;">reilianum</span></i><span style="font-family:Verdana;">. These SAP accessions are new sources that can be further used to develop new breeding parental lines and hybrids and mapping populations for quantitative trait loci markers closely linked to head smut resistance.
This study was conducted to identify resistance sources against the newly documented pathotypes (P5 and P6) of </span><i><span style="font-family:Verdana;">Sporisorium</span></i> <i><span style="font-family:Verdana;">reilianum</span></i><span style="font-family:Verdana;">, causing sorghum head smut. A subset of 67 sorghum association panel (SAP) accessions, 29 in 2017 and 38 in 2018 along with checks BTx635 (resistant) and BTx643 (susceptible) were screened in the greenhouse against P5 and P6 pathotypes in two separate experiments in both years. At 18 to 20 days after planting, accessions were inoculated by injecting the seedlings below the apical meristem with sporidial suspensions following an established inoculation procedure. Three accessions (PI656091, PI533919, and PI533821) in 2017 </span><span style="font-family:Verdana;">and 17 accessions (PI597961, PI656071, PI656048, PI576435, PI534075, PI534145,</span><span style="font-family:Verdana;"> PI656057, PI576437, PI651492, PI656014, PI656025, PI655999, PI656010, PI656082, PI534123, PI533927, PI656100) in 2018 were identified as potential resistant sources to both P5 and P6 pathotypes of </span><i><span style="font-family:Verdana;">S.</span></i> <i><span style="font-family:Verdana;">reilianum</span></i><span style="font-family:Verdana;">. These SAP accessions are new sources that can be further used to develop new breeding parental lines and hybrids and mapping populations for quantitative trait loci markers closely linked to head smut resistance.
作者
Louis K. Prom
Ramasamy Perumal
Thomas Isakeit
Saradha Erattaimuthu
Clint Magill
Louis K. Prom;Ramasamy Perumal;Thomas Isakeit;Saradha Erattaimuthu;Clint Magill(USDA-ARS, Crop Germplasm Research Unit, College Station, TX, USA;Department of Agronomy, Agricultural Research Center, Kansas State University, Hays, KS, USA;Department of Plant Pathology and Microbiology, Texas A&M University, College Station, TX, USA)
