Genetic variability and phylogenetic analysis of Brazilian species of Capsicum

Genetic variability and phylogenetic analysis of Brazilian species of Capsicum

2003

A:PS

Genetic variability and phylogenetic analyses were conducted for 92 accessions of wild and cultivated Capsicum species from Brazil. A total of 277 random amplified polymorphic DNA markers was used to evaluate 96 accessions, which included the outgroup species Atropa belladona, Lycopersicon esculentum, Nicotiana tabacum and Physalis species. The accessions were categorized into two main groups based on cladistic and phenetic analyses: the first group consisted of the cultivated, semi-domesticated and wild species collected from the Atlantic Forest and Roraima state, whereas the second group consisted of the outgroup species. The first group was further divided into subgroups. The C. annuum, C. frutescens and C. chinense accessions were classified into one subgroup. C. baccatum and C. baccatum var. praetemissum accessions comprised another subgroup. The accessions from Atlantic forest were clustered with the wild accessions, such as C. buforum, C. villosum, C. dusenii, C. parvifolium, C. campilopodium, C. flexuosum and C. chacoense. A subgroup consisting C. flexuosum and C. chacoense accessions was designated based on phenetic analysis only. C. villosum and C. buforum accessions formed a subgroup that in the phenetic analysis was genetically identical to the newly collected accessions sp1, sp2 and sp3, but which clustered with sp4, sp6, sp7, sp8 and sp9 based on cladistic analysis. Both analyses indicated that the accessions sp1, sp2 and sp3 were genetically identical.

no.22:13-16, CAPSICUM & EGGPLANT NEWSLETTER

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