Response of Sorghum Accessions against Newly Documented Pathotypes 5 and 6 of Head Smut Pathogen, <i>Sporisorium reilianum</i>

• 作者: Louis K. Prom Ramasamy Perumal Thomas Isakeit Saradha Erattaimuthu Clint Magill
• 来源期刊: 美国植物学期刊(英文)
• 学科: 农学
• 关键词: SORGHUM Sporisorium reilianum Head Smut PATHOTYPE Resistance
• 年，卷（期）: 2021,（3）
• 页码范围: 432-443
• 页数: 12页
• 分类号: S51

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.