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Screening cumin (Cuminum cyminum L.) landraces for resistance to Fusarium oxysporum f. sp. cumini
Australasian Plant Pathology ( IF 1.4 ) Pub Date : 2020-04-23 , DOI: 10.1007/s13313-020-00707-7
Mojtaba Nouraein , Saied Khavari-Khorasani , Majid Akhavan

Fusarium wilt (Fusarium oxysporum f. sp. cumini) is a major constraint to production of cumin. To identify sources of resistance to Fusarium wilt, 64 accessions were screened in a field plot heavily infested with Fusarium wilt, in two years. Disease severity, infection type, disease incidence, plant height, days to flowering initiation, seed yield and yield components were measured. The results revealed significant differences among accessions for all studied traits across both experimental years. There was significant variability for resistance to Fusarium wilt disease among cumin accessions. Ten accessions, G1, G2, G3, G6, G7, G8, G15, G16, G17, and G49, were highly resistant with low dead plants. According to principal component (PC) analysis, the first three components explained about 78% of genetic variation in the first year while the first four components explained 83% of total variation in the second year. In the PC1 of both year, disease severity, infection type, disease incidence, biological yield, seed yield and number of umbellets per umbel were the most effective traits. Based on cluster analysis, 64 accessions were divided into five clusters in both years, whereas clusters I and II showed maximum seed yield and some yield components while clusters IV and V indicated maximum disease resistance variables.

中文翻译:

筛选小茴香(Cuminum cyminum L.)地方品种对尖孢镰刀菌的抗性。sp. 孜然

枯萎病(Fusarium oxysporum f. sp. cumini)是小茴香生产的主要制约因素。为了确定对枯萎病的抗性来源,两年内在一个严重感染枯萎病​​的田间地块中筛选了 64 个种质。测量疾病严重程度、感染类型、疾病发生率、植物高度、开花开始天数、种子产量和产量组成。结果揭示了两个实验年份中所有研究性状的种质之间的显着差异。孜然种质对枯萎病的抗性存在显着差异。十个种质 G1、G2、G3、G6、G7、G8、G15、G16、G17 和 G49 具有高抗性和低死植株。根据主成分(PC)分析,前三个分量解释了第一年大约 78% 的遗传变异,而前四个分量解释了第二年总变异的 83%。在这两年的PC1中,疾病严重程度、感染类型、发病率、生物产量、种子产量和每个伞形花序的伞形花序数是最有效的性状。基于聚类分析,64 个种质在这两年被分为五个聚类,而聚类 I 和 II 显示了最大的种子产量和一些产量成分,而聚类 IV 和 V 显示了最大的抗病性变量。
更新日期:2020-04-23
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