| Popis: |
Linkage was studied in 38 lax-spiked (laxatum) mutants from Bonus (20) and Foma (18) barley. The mutant genes were first localized to chromosome arms by a cytogenetic tester set that indicated linkage to semisterility factors. In preliminary tests, 20 of the lax mutants were found unsuitable owing to sterility, presence of translocations, variable penetrance of indistinguishable morphology, alone or in combination. Of the other 18 mutants, 5 gave no linkage indications, mostly owing to varying penetrance in different tester combinations. 5 other mutants showed association with more than one chromosome arm. 8 mutant genes were localized to chromosome arms and the distances of 4 of them to known markers were estimated by two-and three-point tests: abrl was located to the short arm of chromosome 2; lax-b and lax-c were 27.3 cM apart in the long arm of chromosome 6; and coml (synonymous to birl) was located to the long arm of chromosome 7 |
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