埃塞俄比亚本地和外来辣椒基因型对枯萎病的抗性来源筛选及相关品质性状

S. Aklilu, G. Ayana, B. Abebie, T. Abdissa
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引用次数: 2

摘要

在埃塞俄比亚Melkassa农业研究中心的一个温室中,对54种辣椒种质(49种地方种质和5种AVRDC基因型)的抗枯萎病性进行了评价。采用完全随机设计,3个重复。对各地方品种辣椒素和油树脂含量的相关品质性状进行了分析。总体结果表明,Acc-15的发病率从8% (PBC-731)到100%不等。大多数本地标本的发病率高于AVRDC基因型,总体平均DI为60%。根据严重程度等级(1 ~ 5级),2份材料(Acc-39和PBC-731)严重程度等级为1,有14份材料严重程度等级为2,38份材料严重程度等级>3。accc -32和accc -24辣椒素含量为0.16 ~ 0.55%,热单位为26372 ~ 88775 SHU。国际颜色单位和ASTA值的油树脂含量为32,800 ~ 118,840 cu和82 ~ 296 ASTA,总体平均值为69704 ICU和172 ASTA值。大于250 ASTA的最高色质色有10个材料(Acc-4、Acc-5、Acc-6、Acc-7、Acc-24、Acc-27、Acc-33、Acc-34、Acc-39和Acc-31)。本研究从49个地方种质中筛选出具有理想品质的抗性种质。这些材料也具有良好的抗枯萎病潜力,可以作为未来杂交的源亲本,也可以作为辣椒改良项目中抗枯萎病和高加工品质性状的同步选择。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Screening for Resistance Sources in Local and Exotic Hot Pepper Genotypes to Fusarium Wilt ( Fusarium oxysporium ) and Associated Quality Traits in Ethiopia
Fifty-four hot pepper germplasm (49 local accessions and 5 AVRDC genotypes) were evaluated for resistance to fusarium wilt in a greenhouse at Melkassa Agricultural Research Centre in Ethiopia. A completely randomized design with three replications was used. Each local accession was also analyzed for associated quality traits of capsaicin and oleoresin content. The overall results indicated that disease incidence ranged from 8 (PBC-731) to 100% for Acc-15. Most local collections exhibited higher disease incidences percent than AVRDC genotypes with an overall mean DI 60%. Based on severity rating (1-5 scale), two accessions (Acc-39 and PBC-731) were highly resistant to wilt with severity ratings of 1 and 14 accessions were found resistant with severity rating scale of 2 whereas 38 accessions were susceptible with severity scale of >3. Capsaicin content percentage ranged from 0.16-0.55%, and heat unit ranged 26372 to 88775 SHU, for Acc-32 and Acc-24, respectively. Oleoresin content in international color unit and ASTA value ranged from 32,800 to 118,840 cu and 82-296 ASTA with an overall mean of 69,704 ICU and 172 ASTA value. The highest color quality colors of greater than 250 ASTA was exhibited by 10 accessions (Acc-4, Acc-5, Acc-6, Acc-7, Acc-24, Acc-27, Acc-33, Acc-34, Acc-39 and Acc-31). This study identified resistance accessions with desirable qualities among the 49 local accessions. These materials also had good wilt resistance potential and could be used as source parents in the future hybridization and for simultaneous selection for Fusarium wilt resistance and high processing quality traits in hot pepper improvement program.
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