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Regulation of hairless septa in flax genotrophs


Genetica (Dordrecht) 48(3): 171-184
Regulation of hairless septa in flax genotrophs
Reciprocal crosses were made between large and small genotrophs differing in the capsule character H-h (hairy-hairless septa) of the variety Stormont Cirrus, thus bringing together 2 levels of regulation, one determining H and the other h in the Hh heterozygotes. HH, Hh and hh types appear in all generations from F2 to F5 but the Hh plants can be grouped in up to 4 classes with about 20, 30, 40 and 50 hairs/septum. A proportion of F2 and F3 Hh plants are switched to HH in some environments and to hh in others, but in later generations more stable Hh heterozygotes appear which are unaffected by the environment and give normal ratios undisturbed by the Hh class from which they are descended, either because they have been selected for, or because they have been built up, over generations. HH plants in F2 are enhanced, i.e., they have a higher mean hair number than HH parents, and give more Hh plants in the highest hair number class when backcrossed to hh than do HH parents crossed with hh.

Accession: 006288321

DOI: 10.1007/bf00155567

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