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| Genetic Analysis of Trichome Density on the Main Stem and Leaves in a Recombinant Inbred Lines Population Derived from Wild Pepper(Capsicum annuum L.) |
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Abstract Plant trichomes are atrracting more and more attention for their effect on stress resistance. A F9 recombinant inbred lines population derived from the cross of wild hot pepper(Capsicum annuum L.) PM702 bearing trichomes with glabrous sweet pepper(C. annuum L.) FS871, was used for genetic analysis of trichome density on the main stem and leaves, using the mixed major gene plus polygene inheritance model. The results showed that trichome density on the main stem of pepper was controlled by two major genes and some minor polygenes(E-2-3 model). For the two genes, the additive effect was primary. The heritability of major genes for the trichome density on the main stem was 53.00%, while the heritability of polygenes was 25.30%, and the recombination rate was 0.6226. The trichome density on the leaves was controlled by two complementary major genes with additive effect and interaction plus some polygenes(E-1-7 model). The heritability of major genes of trichome density on the leaves was 50.65%, while the heritability of polygenes was 8.86%. This study provides an academic foundation for breeding highly resistant pepper varieties.
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Received: 07 September 2012
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