Seed development after self-pollination and cross-pollination of Scots pine, Pinus sylvestris L

Content Provider	Semantic Scholar
Author	Forshell, Christina Plym
Copyright Year	1974
Abstract	The development of pollen tubes and ovules and the formation of embryos and endorperm after different types of pollination: self-pollination, crosspollination and wind-pollination were studied in ten clones of Pinus sylvestris. Pollinization and fertilization took place in all types of pollination. At a certain state of development, however, embryos in some seeds began to degenerate. This degeneration was followed by a breaking down of the endosperm and resulted in empty seeds. The percentage of degenerated seeds was highest after self-pollinization, considerably lower after wind-pollination and smallest after cross-pollination. The results indicate that inviable zygotes, homozygous for lethal or sub-lethal genes, are formed after self-pollination and explain the high percentage of empty seeds usually found after this type of pollination. Wind-pollinization may to some extent involve self-pollination. No clone was found to be quite self-sterile, but the differences in selfertility~ between the clones were rather great.
File Format	PDF HTM / HTML
Alternate Webpage(s)	https://pub.epsilon.slu.se/5693/1/SFS118.pdf
Alternate Webpage(s)	http://epsilon.slu.se/studia/SFS118.pdf
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article