中国灌木辣椒种质农艺性状鉴定与疫病抗性评价

为科学评价中国灌木辣椒种质,选取有代表性的8份辣椒材料,开展了中国灌木辣椒农艺性状鉴定和疫病抗性分析。结果表明:中国灌木辣椒长势强,株高均在1.0 m以上,叶片阔大,花瓣白绿色;果实直立向上,单果质量在0.51~2.04 g之间,平均为1.26 g;果实辣椒素与二氢辣椒素含量之和在565.00~1821.00 mg/kg,平均为1328.33mg/kg,是一年生辣椒B9431的407倍;对疫霉菌抗性水平表现为中抗至高抗,其中,海南野生灌木辣椒H108表现高抗。基于表型数据的主成分分析将中国灌木辣椒与一年生辣椒及美洲灌木辣椒有效区分开来。本研究结果为中国灌木辣椒优异基因的发掘和有效利用提供了理论参考。

Identification of Agronomic Traits and Evaluation of Resistance to Phytophthora capsici in C. frutescens in China

For scientific evaluation of germplasm resource in Capsicum frutescens in China, eight representative accessions were selected to assess the agronomic traits and analyze the resistance to Phytophthora capsici. The result showed: the accessions in C. frutescens in China had strong growth with plant height above 1.0 m, broad leaves, white green flowers and erect and upward fruits. Average fruit weight was 0.51g - 2.04 g and the mean value was 1.26g. The total content of capsaicin and dihydrocapsaicin was 565.00 mg/kg - 1821.00 mg/kg, the average content was 1328.33 mg/kg, which was 406 times higher than that in C. annuum B9431. The resources in C. frutescens in China showed middle resistance until high resistance to phytophthora capsici, and wild C. frutescens H108 in Hainan province possessed high resistance to the disease. Principal component analysis based on phenotypic data could separate C. frutescens accessions in China from the same species accession in American and C. annuum accession. This study lays a theoretical reference for the discovery and utilization of elite genes in C. frutescens in China.