Rakefet Gabay

Bio: Rakefet Gabay is an academic researcher from Hebrew University of Jerusalem. The author has contributed to research in topics: Tribe (biology) & Dominance (ecology). The author has an hindex of 2, co-authored 3 publications receiving 34 citations.

Innovations in the tribe vicieae (fabaceae) from israel

Abstract: Recent extensive field and taxonomic studies have revealed new taxa of various ranks in the leguminous tribe Vicieae, whereas few other taxa had to be revised. Most of the findings were in the Northern districts of Israel and the Golan Heights. The article sums up these innovations, diagnostically describing two new taxa in Lathyrus and three in Vicia. Possible modes of differentiation in the tribe are briefly discussed.

Evidence for the hybrid origin of Lathyrus plitmannii (Leguminosae)

Abstract: The hypothesis that Lathyrus plitmannii may be of hybrid origin was tested on a morphological data set, derived from measurements of 50 herbarium specimens, by employing the computer program HYWIN. Results showed that all the specimens of L. plitmannii were putative hybrids and that the highest ranked pair of specimens that best matches the morphologies of its parents was L. gorgonei and L. pseudocicera. Examination of the distribution patterns of the three species shows that L. plitmannii is confined to regions common to both putative parents and that hybrids could be formed, assuming that genetic barriers were overcome. Additional supporting evidence includes overlaps in the edaphic requirements and the habitats of the three species. Lathyrus plitmannii is recognised as a distinct species that should be regarded as derivative of hybridisation between L. gorgonei and L. pseudocicera.

Chloroplast DNA characters, phylogeny, and classification of Lathyrus (Fabaceae).

Abstract: Mapped cpDNA restriction site characters were analyzed cladistically and the resulting phylogenetic hypotheses were used to test monophyly and relationships of the infrageneric classification of Lathyrus (Fabaceae) proposed by Kupicha (1983, Notes from the Royal Botanic Garden Edinburgh41: 209‐244). The validity of previously proposed classification systems and questions presented by these classification schemes were explored. Two cpDNA regions, rpo C( rpoC1, its intron, part of rpoC2, and their intergenic spacer) and IR 2 (psbA, trnH-GUG, part of ndhF, and their intergenic spacers), were analyzed for 42 Lathyrus and two Vicia species. PCR (polymerase chain reaction) amplified rpoC and IR 2 products digested with 31 and 27 restriction endonucleases, respectively, resulted in 109 potentially informative characters. The strict consensus tree suggests that several of Kupicha’s sections may be combined in order to constitute clades. The widespread section Orobus and the South American section Notolathyrus should be combined. Section Lathyrus, characterized by a twisted style, should either include sections Orobon and Orobastrum or be redefined as three sections, one of which is characterized by a 100 base pair deletion in the IR 2 region. Finally, a weighted parsimony analysis positions sections Clymenum(excluding L. gloeospermus) and Nissolia, both with phyllodic leaves, as sister sections. The affiliation of Lathyrus gloeospermus (section Clymenum) remains problematic.

Biology of milk thistle (Silybum marianum) and the management options for growers in north‐western Pakistan

Abstract: Milk thistle (Silybum marianum) is cultivated as a medicinal plant but it also can be a troublesome weed. It is an annual or biennial herb that prefers high rainfall and fertile soils. Milk thistle has become a widespread weed in north-western Pakistan, where it causes yield reductions ≤37% in wheat and poses harvesting problems due to its thorny nature. Shortcomings in cultural practises, such as a low crop seed rate, wide row spacing, broadcast fertilizer, and limited crop rotation have contributed to milk thistle becoming a severe weed problem for farmers in this region. This paper reviews the biology of milk thistle and discusses the possible management options for its control, considering the socioeconomic conditions of farmers in Pakistan.

Comparative genetic diversity studies in the genus Lathyrus using RFLP and RAPD markers

Abstract: Introduction The genus Lathyrus is a member of the Viciae tribe (family Fabaceae). The genus consists of about 160 annual and perennial species (1, . The species are seperated into 13 sections based on morphological traits . In Tunisia, the genus Lathyrus is represented by 15 species with a broad distribution . Some species such as L. sativus, L. cicera, L. odoratus and others are of agricultural importance as forage, fodder or ornamental plants and have a long history as cultivated plants. Taking into account the utility that the culture of these species can have in Tunisia and in the Mediterranean basin, a good knowledge of their biology and some organization of their genetic diversity is necessary to preserve the Tunisian genetic inheritance.