ISHS Acta Horticulturae 751: IV International Symposium on Rose Research and Cultivation
INHERITANCE OF FLOWER TRAITS, LEAFLET NUMBER AND PRICKLES IN ROSES |
| Authors: | D.A. Shupert, D.H. Byrne, H. Brent Pemberton |
| Keywords: | Rosa, genetics, recurrent blooming, flower color, flower form, stem prickles |
| Abstract:
The Basye Rose Breeding and Genetics Program at Texas A&M University has developed rose populations from the backcross of Rosa chinensis ‘Old Blush’ to WOB (interspecific diploid hybrid between Rosa wichurana ‘Basye’s Thornless’ and ‘Old Blush’). The progenies were evaluated for bloom habit, flower color, flower form, the presence of stem prickles, and leaflet number at College Station and/or Overton, Texas. The qualitative traits flower color (pink co-dominant to white), flower form (double dominant to single), and presence of stem prickles (prickles dominant to no prickles on stem) support the reported monogenic modes of inheritance for each of these traits. The segregation of the flowering (nonrecurrent dominant to recurrent) habit trait showed a deficiency of recurrent blooming type and consequently the ratio did not fit the expected monogenic model. Leaflet number demonstrated a quantitative mode of inheritance. For leaflet number, the genetic effects [generation and/or genotype(generation)] explained most of the variation. The environment or genetic x environment effects were not significant indicating that leaflet number is stable across the environments tested. | |
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