Phenotypic identification of peanut germplasm for resistance to southern stem rot.
Phenotypic identification of peanut germplasm for resistance to southern stem rot.
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DOI：
10.1016/j.ocsci.2020.12.001
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发表时间：
2020-01-01
期刊：
影响因子：
--
通讯作者：
Liao, Bo-shou
中科院分区：
文献类型：
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作者：
Fan, Peng-min;Song, Wan-duo;Liao, Bo-shou
南方茎腐病是由白绢病（Sclerotium rolfsii Sacc.）是花生的一种毁灭性土壤真菌病害。为评价花生抗茎腐病种质资源，采用人工接种方法，在3种环境下对256份花生材料进行了抗茎腐病鉴定。方差分析表明，病情指数受环境、基因型和基因型与环境互作的影响显著。花生品种var.普通型对南方茎腐病的抗性较高。病情指数与亚油酸含量呈显著负相关，与油酸含量呈显著正相关。鉴定出华28、山东仔、ICG 6326、泉花7号、泉花9号和桂花836等6份抗病材料，在3种环境中病情指数均在40以下，死亡率均在30%以下。鉴定出的抗源在花生抗病育种中具有很大的应用潜力，是提高花生对南方茎腐病抗性的良好遗传资源。
Southern stem rot, caused by Sclerotium rolfsii Sacc., is a destructive soil fungal disease of peanut in China and other countries. To evaluate resistant germplasm, a total of 256 peanut accessions were investigated on their resistance to southern stem rot in 3 environments by artificial inoculation. Variance analysis indicated that disease index was significantly influenced by environment, genotype and genotype * environment interactions. Peanut accessions of var. vulgaris type exhibited higher resistance to southern stem rot. Disease index was significantly negatively correlated with linoleic acid content, while positively correlated with oleic acid content. Six resistant accessions were identified, including Hua 28, Shandongzai, ICG 6326, Quanhua 7, Quanhua 9 and Guihua 836, with their disease indexes under 40 and mortality were less than 30% in the three environments. The identified resistant accessions showed the great potential to be applied in resistant peanut breeding, and would be good genetic resources for enhancing the resistance to southern stem rot.