Liang C.-CWei T.-YDER-MING YEH2021-07-262021-07-262020185345https://www.scopus.com/inward/record.uri?eid=2-s2.0-85097230159&doi=10.21273%2fHORTSCI15385-20&partnerID=40&md5=a1ffcfdf3fd14b3c136ae449447a41e7https://scholars.lib.ntu.edu.tw/handle/123456789/572791Neoregelia cultivars have been used in many areas for landscaping and indoors in a variety of creative ways, but scientific reports of their pollination and hybridization are presently limited. Cross-combinations of Neoregelia cultivars were created to define conditions for pollination timing and to evaluate cross-compatibility. Neoregelia cultivars have short-lived flowers. Hybrid seeds were obtained only when cross-pollination was performed before 1200 HR. Results of 19 cross-combinations including six reciprocal crosses revealed that hybrid seeds were obtained in the female parents with a 1.9- to 2.0-cm style length, but not in those with a 2.6- to 3.0-cm style length. The pollen tube penetrated the ovule as early as 1 day after pollination in the compatible cross, whereas swollen pollen tubes were observed at half and two-thirds of the style in the incompatible cross. Removal of 50% of the style length of the female parents could overcome the fertilization barrier for those incompatible crosses and hybrid seeds could be successfully obtained. ? This is an open access article distributed under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0/).[SDGs]SDG13[SDGs]SDG15journal article10.21273/HORTSCI15385-202-s2.0-85097230159