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Self‐Fertile Doubled Haploid Plants of Perennial Ryegrass ( Lolium perenne L.)
Author(s) -
Madsen S.,
Olesen A.,
Andersen S. B.
Publication year - 1993
Publication title -
plant breeding
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.583
H-Index - 71
eISSN - 1439-0523
pISSN - 0179-9541
DOI - 10.1111/j.1439-0523.1993.tb00596.x
Subject(s) - selfing , biology , lolium perenne , ploidy , perennial plant , fertility , doubled haploidy , pollen , chromosome , botany , genetic variation , agronomy , genetics , population , gene , demography , sociology
The self‐fertility of chromosome‐doubled haploid lines of perennial ryegrass and their first (I 1 ) and second (I 2 ) generation selfed offspring was studied. The overall seed set was low, 0—0.4 seeds per spike, as would be expected for chromosome‐doubled haploids of a self‐incompatible species. Nevertheless, significant genetic variation was observed for self‐fertility within three of the six lines studied. Within one line, three I 2 ‐clones showed increased self‐fertility, while in two other lines one and three I 1 ‐clones, respectively, showed significantly increased self‐fertility. Selection, during selfing, of rare pollen grains with mutations in the self‐incompatibility system could explain the observed changes and would lead to a general breakdown of self‐incompatibility in Lolium perenne during repeated selfing of chromosome‐doubled haploids.