The use of volatile compounds as an alternative method in pepper breeding (Capsicum baccatum var. pendulum)

ABSTRACT: The aim of this study is to determine some fruit characteristics of 19 different lines hybridized by previous regular studies. These lines were examined in order to determine the differences among volatile components and reveal the differences in comparison with the parents. Plant height (cm), fruit weight (g), fruit width (mm), fruit length (mm), fruit flesh thickness (mm), pungency, immature fruit color and mature fruit color were determined of parents and F4 lines. As a result, a wide range of variations were determined between lines and parents in terms of all parameters apart from pungency. Especially in terms of volatile components, it has been found that some active substances are found only in the father and white genotype (Fenchol, spathulenol and geranyl acetate), some of them only in the mother and orange genotype (α-terpineol, dihexyl azelate and 2-hexadecanol). It was concluded that volatile compounds of the species can be used as a marker for breeding studies.

摘要：本研究旨在明确此前通过常规杂交育种获得的19个不同品系的部分果实性状。本研究对这些品系进行检测，以明确其挥发性成分间的差异，并揭示其与亲本之间的性状差异。研究测定了亲本及F4代品系的株高（cm）、单果重（g）、果宽（mm）、果长（mm）、果肉厚度（mm）、辛辣度、未成熟果实颜色以及成熟果实颜色。结果表明，除辛辣度外，其余所有性状参数在品系与亲本间均存在广泛变异。尤其在挥发性成分方面，研究发现部分活性物质仅存在于父本及白色基因型材料中（葑醇（Fenchol）、斯巴醇（spathulenol）与乙酸香叶酯（geranyl acetate）），另有部分活性物质仅存在于母本及橙色基因型材料中（α-松油醇（α-terpineol）、壬二酸二己酯（dihexyl azelate）与2-十六烷醇（2-hexadecanol））。最终研究结论认为，该物种的挥发性成分可作为育种研究的标记性状。