Induced Resistance to <i>Striga hermonthica</i>in Sorghum by Gamma Irradiation

• 作者: Adel Ali Djibril Yonli Hamidou Traoré Hamidou Y. A. Yanogo Harimialimalala J. Rabefiraisana Ingelbrecht Ivan Karim Dao Ljupcho Jankuloski Mahamadou Sawadogo Minimassom P. Nikièma Mukhtar Ali Ghanim Abdelbagi Nofou Ouédraogo
• 来源期刊: 美国植物学期刊(英文)
• 学科: 数学
• 关键词: SORGHUM Induced Mutation Striga Resistance
• 年，卷（期）: mgzwxqkyw_2020,（10）
• 页码范围: 1545-1561
• 页数: 17页
• 分类号: O17

摘要

<div style="text-align:justify;"> <i><span style="font-family:Verdana;">Striga</span></i><span style="font-family:Verdana;"> species affect the potential productivity of cereals in sub-Saharian Africa due to the lack of durable </span><i><span style="font-family:Verdana;">Striga</span></i><span style="font-family:Verdana;">-resistance in host crops. This study aimed at inducing the new source of resistance in sorghum using gamma irradiation. Dry seeds of three Sorghum varieties;Grinkan, ICV1049 and Sariaso14 were gamma-irradiated with 200 Gy, 300 Gy, 400 Gy and 500 Gy. Screening strategies involved a 2-year field and greenhouse experiments, where mutant Sorghum families, their parents and resistant control were artificially infected with </span><i><span style="font-family:Verdana;">Striga hermonthica</span></i><span style="font-family:Verdana;"> seeds. Field screenings revealed induced genetic variability among them, forty families significantly reduced the number of emerged </span><i><span style="font-family:Verdana;">Striga</span></i><span style="font-family:Verdana;"> plants or showed good Sorghum grain yield performance despite the infection by S. </span><i><span style="font-family:Verdana;">hermonthica</span></i><span style="font-family:Verdana;"> ecotype from Burkina Faso. The induced putative resistant mutants were identified across the four applied gamma-irradiation doses. Greenhouse experiment confirmed </span><i><span style="font-family:Verdana;">Striga</span></i><span style="font-family:Verdana;"> resistance in seven mutant Sorghum families leading to no emergence of Burkina’s S. </span><i><span style="font-family:Verdana;">hermonthica</span></i><span style="font-family:Verdana;"> ecotype along with high resistance index (RI) and low </span><i><span style="font-family:Verdana;">Striga</span></i><span style="font-family:Verdana;"> damage score. Among them, two mutants SA38M5 and IC47M5 withstood S. </span><i><span style="font-family:Verdana;">hermonthica</span></i><span style="font-family:Verdana;"> e