Editorial: Genetics and genomics of plant reproduction for crop breeding, volume II

Our Research Topic, Genetics and Genomics of Plant Reproduction for Crop Breeding, includes a total of 25 articles in its !rst volume (Research Topic, vol. 1) and additional 12 articles in its second volume (Research Topic, vol. 2). It represents a valuable collection of both Original Research and Review Articles focused on the recent advances of our knowledge on the genetics of crop plant reproductive systems owing to the application and exploitation of novel biotechnological tools supported by information deriving from modern genomics. Several articles provided insights on identifying the genetic mechanisms and factors that control the expression of sexual barriers and molecular markers for their prediction in important horticultural crops and fruit trees.