Pimwadee Pornpongrungrueng

Blumea (Compositae: Inuleae) in continental Southeast Asia

SummaryA revision of the genus Blumea DC. in continental Southeast Asia, including Myanmar, Thailand, Laos, Cambodia, Vietnam and Peninsular Malaysia, is presented covering aspects of taxonomic history, key to taxa, synonymy, descriptions, and notes on distribution, ecology and phenology. Blumeopsis is reduced. Twenty-seven species are recognised, one of which is divided into two varieties. The lectotypes of 26 names are designated and three names are resuscitated here: B. flava, B. hamiltonii and B. macrostachya.

Genetic diversity of citrus (Rutaceae) in Iraq based on random amplified polymorphic DNA (RAPD) markers

Citrus is an economically important fruit crop with a long history of cultivation worldwide. A great number of varieties of citrus are extensively grown in the Middle East including Iraq for domestic consumption and exports. However, the genetic diversity of this genus in Iraq has not been reported. Therefore, the objective of this study was to evaluate genetic relationships of Iragi citrus genotypes to provide useful information for germplasm conservation and planning of breeding strategies. Twenty decamer primers were used to generate RAPD markers to evaluate genetic relationship among 16 genotypes (14 species and hybrids) of cultivated Citrus in Iraq. Based on RAPD polymorphisms, the citrus genotypes were classified into two main groups; the first consisted of citron (Citrus medica) and its hybrids (lime and lemon). The second group contained the remaining genotypes including three sub-groups; the first being formed of sour orange (Citrus aurantium), sweet orange (Citrus sinensis) and grapefruit (Citrus paradisi), the second the mandarins (Citrus reticulata) and the third the pummelo (Citrus grandis). The RAPD-based classification was consistent with previous studies based on other types of molecular markers. n n xa0 n n Key words: Citrus, genetic diversity, Iraq, oranges, random amplified polymorphic DNA (RAPD) markers.