Intergeneric hybridization and C-banding patterns inHordelymus (Triticeae,Poaceae) |
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| Authors: | Roland von Bothmer Bao-Rong Lu Ib Linde-Laursen |
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| Institution: | (1) Department of Plant Breeding Research, Swedish University of Agricultural Sciences, S-268 31 Svalöv, Sweden;(2) Plant Biology Section, Risø National Laboratory, DK-4000 Roskilde, Denmark |
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| Abstract: | Crosses ofHordelymus europaeus (2n = 4x = 28) with four genera in theTriticeae were attempted. Adult hybrids were obtained in combinations withHordeum bogdanii (2x),Hordeum depressum (4x), andSecale cereale (2x). The meiotic pairing was very low in the hybrids withH. bogdanii andSecale cereale (0.12 and 0.30 chiasmata/cell, respectively), whereas high pairing (9.90 chiasmata/cell) was found in hybrids withH. depressum due to autosyndetic pairing ofH. depressum chromosomes. The chromosome complement ofHordelymus europaeus comprised 16 metacentrics, 8 submetacentrics, and 4 SAT-chromosomes. The Giemsa C-banding patterns of the chromosomes were characterized by small to minute bands at no preferential positions. It is hypothesized thatHordelymus europaeus may genomically be closest related toTaeniatherum andPsathyrostachys spp. |
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| Keywords: | Poaceae Triticeae Hordelymus Hordeum Secale Intergeneric hybrids C-banding genome analysis |
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