A Meiotic Study of the Wild and Semi-domesticated Brazilian Species of Genus Capsicum L. (Solanaceae)

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Abstract

Meiotic behavior was analysed in 30 accessions of 12 wild (Capsicum flexuosum, C. parvifolium, C. buforum, C. campylopodium, C. cornutum, C. pereirae, C. friburgense, C. schottianum, C. villosum var. villosum, and 3 new species) and 2 semi-domesticated (C. baccatum L. var praetermissum and C. chinense) Brazilian Capsicum species. This is the first report on meiosis for most of these taxa. Except for C. baccatum L. var praetermissum, C. chinense, C. flexuosum and C. parvifolium, with 2n=24 chromosomes, all other taxa had 2n=26 chromosomes, a number previously considered as not common in the genus. Meiotic pairing was generally regular (12 or 13 bivalents) for most of the species analyzed. However, different irregularities such as univalents, multivalents, bridges, chromosome stickiness, unoriented chromosomes, monads, dyads and polyads, among others, were found at both meiosis I and meiosis II, leading to unbalanced final meiotic products but generally not a high pollen sterility. It was not possible to establish with certainty if these irregularities were due to genetic (meiotic mutations) or environmental (such as pests and diseases) causes.

Journal

  • CYTOLOGIA

    CYTOLOGIA 71 (3), 275-287, 2006

    Japan Mendel Society, International Society of Cytology

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