Artificial hybridization between Robinia pseudoacacia L. and R. pseudoacacia var. monophylla Carr.

摘要

Results regarding artificial cross- and self-pollination between Robinia pseudoacacia and R. pseudoacacia var. monophylla are reported. The parental clones involved in a diallele mating scheme were selected according to leaf type phenotype and included (1) single-leaf type, (2) 25-leaf type, (3) three-leaf type and (4) common Robinia. Artificial pollination proved to be a difficult and delicate procedure. A total of 33 pollinations were made which resulted in the formation of 84 pods, 24 of which developed fully and produced 65 seeds. Fifteen seeds were germinated, resulting in the production of two putative fertile hybrids. The success of the hybridization was assessed by genetic markers, while parental clones and hybrid progeny were assigned multilocus genotypes. The mode of inheritance of the leaf type trait was studied in open-pollinated families where the monophylla type was the maternal parent. The study indicated that the leaf type in the monophylla variety may be associated with major gene effects.