观赏辣椒种质资源农艺性状遗传多样性关联分析

为了解观赏辣椒种质资源的农艺和观赏性状,为观赏辣椒在家庭园艺中应用及新品种选育提供依据,对40份观赏辣椒种质资源的主要农艺性状进行了遗传多样性及相关性分析。结果表明,单株果数和单果质量的变异系数最大,最易发生变异,株幅的变异系数最小,遗传最稳定。22个性状的多样性指数范围为0~2.06。株高与株幅、主枝长、单株果数呈极显著正相关,与叶形呈极显著负相关;株幅与叶形和花梗着生位置呈极显著负相关;果实横径与单果质量呈极显著正相关,与单株果数呈极显著负相关;果实纵径与果顶形状呈极显著负相关;单果质量与单株果数、果形呈极显著负相关;老熟果色与花冠色、花柱颜色呈极显著正相关;叶形与叶缘和果形呈极显著正相关;叶缘与花梗着生位置呈极显著正相关,与花冠色呈显著负相关。上述主要农艺性状数据及其相关性,可以为后续筛选适合家庭园艺种植的观赏辣椒品种提供依据。

Analysis in agronomic characters of ornamental pepper germplasm resources

In this study, we collected and planted 40 varieties of ornamental peppers under the same conditions and then described their ornamental characters in correlation with their diverse genetic backgrounds of pepper germplasm resources. Our results showed that the variation in both the number of fruits per plant and the weight per fruit was the largest amongst the whole group, while the lowest variation was the plant size. The average genetic diversity index was 0~2.06 in the 22 pepper varieties. Plant height had significantly positive correlation with plant breadth, bough length and number of fruits per plant, but there were very significantly negative correlation among plant height and leaf shape. There were very significantly positive correlation among plant breadth, leaf shape and pedicel bearing state. Fruit diameter had significantly negative correlation with weight per fruit, but there were very significantly positive correlation among number of fruits per plant. There was very significantly positive correlation among fruit length and fruit apex shape. There were very significantly positive correlation among number of fruits per plant, weight per fruit and fruit shape. Color of fruit had significantly negative correlation with flower color and style color. Leaf shape had significantly negative correlation with leaf margin and fruit shape. Leaf margin had significantly negative correlation with pedicel bearing state, but there were very significantly positive correlation among flower color. The results of this study can provide information for guiding the breeding and use of new varieties of ornamental peppers in gardening.