3 Table of Contents Foreword ............................................................................................................................................ 1 Announcements ................................................................................................................................ 5 Research Reports Allelism test among high locule number tomato mutants and genetic mapping of the loci involved Barrero, L . S . and Tanksley, S . D . .......................................................................................... 11 Introgression of the corresponding S - locus region of chromosome 1 from L . esculentum into L . hirsutum and effects on reproduction Bernatzky, R . , Glaven, R . H ................................................................................................... 14 Fine mapping of stigma exsertion QTL se2 . 1 Chen, K . Y . and Tanksley S . D . .......................................................................................... 15 An update of the Solanaceae Genome Network (SGN), http://soldb . cit . cornell . edu, and related work Fulton, T . M . , Ilut, D . C . , Wright, M . H . , van der Hoeven, R . H . , Tanksley, S . D . ....................... 17 Prospects of usage of various sources of resistance to powdery mildew ( Oidium lycopersicum Che et Mass ) in tomato breeding Ignatova, S . I . , Tereshonkova, T . A . , Gorshkova, N . S . ........................................................... 19 Allele Tests of High Pigment Genotypes Using Root Anthocyanin Expression Jones, C . M . , Myers, J . R . and Chetelat, R . T .......................................................................... 23 Molecular mapping of the Am gene conferring resistance to Alfalfa Mosaic Virus (AMV) in tomato Parrella G . , Moretti, A . , Gognalons, P . , Marchoux, G . , Gebre - Selassié K . and Caranta C ... 27 Tomato ( Lycopersicon esculentum, Mill . ) plant regeneration in absence of exogenous growth regulators Plana, D . , Alvarez, M . , Florido, M . , Lara, R . M . , Moya, C . ..................................................... 29 Resistance of tomato lines to races of Xanthomonas vesicatoria Sotirova, V . and Bogatsevska, N ........................................................................................... 31 Comparison of the frequency and distribution of chiasmata in diploid and tetraploid forms of Lycopersicon pimpinellifolium Strelnikova S . R . ................................................................................................................... 34 A L . esculentum x L . pennellii backcross recombinant inbred population Vision, T . J . , Xu, Y . , Van Eck, N . , Brown, D . G . and Tanksley, S . D ........................................ 36 Stock Lists ....................................................................................................................................... 37 Membership Lists ........................................................................................................................... 67 Author Index .................................................................................................................................... 72