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Diploid Perennial Intergeneric Hybrids in the Tribe Triticeae . I. Agropyron cristatum ✕ Pseudoroegneria libanotica and Critesion violaceum ✕ Psathyrostachys juncea 1
Author(s) -
Wang Richard RC.
Publication year - 1986
Publication title -
crop science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.76
H-Index - 147
eISSN - 1435-0653
pISSN - 0011-183X
DOI - 10.2135/cropsci1986.0011183x002600010017x
Subject(s) - biology , agropyron cristatum , ploidy , hybrid , triticeae , elymus , botany , anaphase , agropyron , meiosis , chromosome , genome , genetics , gene , poaceae
Twelve Agropyron cristatum (L.) Gaertner (2n=14; PP) ✕ Pseudoroegneria libanotica (Hack.) D. R. Dewey (2n=14; SS) brids and nine Critesion violaceum (Boiss. & Hohen.) A. Löve (2n=14; H V H V ) ✕ Psathyrostachys juncea (Fisch.) Nevski (2n=14; NN) hybrids were produced to synthesize new genome combinations for production of amphiploids. These hybrids were obtained by controlled pollination and embryo culture on orchid agar medium. Spikes of these two diploid intergeneric hybrids were intermediate to those of their respective parents. The A. cristatum ✕ P. libanotica hybrids (2n=14; PS) averaged 7.71 I , 2.77 II , 0.22 III , 0.01 IV , and 0.01 V per cell at metaphase I, 3.06 laggards per cell at anaphase I, and 3.35 micronuclei per quartet. Chromosome pairings were mainly allosyndetic between the Pgenome (large) and the S‐genome (small) chromosomes. Hybrid plants of C. violaceum ✕ P. juncea (2n=14; H V N) averaged 12.18 I , 0.79 II , and 0.01 III per cell at metaphase I, 3.12 laggards per cell at anaphase I, and 1.30 micronuclei per quartet. Neither hybrid combination produced stainable pollen grains. Meiotic pairing in these hybridsuggests that the relationship between the P and S genomes is closer than that between the H V ; and N genomes.