INTERSPECIFIC CROSSES IN THE GENUS TULIPA L - IDENTIFICATION OF PREFERTILIZATION BARRIERS

Citation
Mgm. Vancreij et al., INTERSPECIFIC CROSSES IN THE GENUS TULIPA L - IDENTIFICATION OF PREFERTILIZATION BARRIERS, Sexual plant reproduction, 10(2), 1997, pp. 116-123
Citations number
31
Categorie Soggetti
Reproductive Biology","Plant Sciences
Journal title
ISSN journal
09340882
Volume
10
Issue
2
Year of publication
1997
Pages
116 - 123
Database
ISI
SICI code
0934-0882(1997)10:2<116:ICITGT>2.0.ZU;2-O
Abstract
Pollen tube growth in the pistil and pollen tube penetration of ovules have both been studied in crosses between cultivars from Tulipa gesne riana L. and 12 tulip species from all eight sections of the genus Tul ipa to identify pre-fertilization barriers. Depending on the cross, po llen tubes grew as far as the stigma or the style or continued growing down into the ovary. Pollen tubes penetrated none or only a few perce nt of the ovules of some crosses, despite the presence of many pollen tubes in the ovary. In other crosses, from which no or only a few hybr ids have been obtained after seed maturation on the plant, pollen tube penetration was found in up to 79% of the ovules. Apparently, various kinds of barriers preventing fertilization or normal embryogenesis oc cur in interspecific tulip crosses.