PNL Volume 14

1982

RESEARCH REPORTS

SUPPLEMENTARY EVIDENCE FOR THE LINKAGE OF afila WITH MUTANTS ON

CHROMOSOME 1

Kielpinski, M. Plant Breeding Station, Prusinowo, Poland

The afila (af) gene which converts leaflets into tendrils is now

widely used in breeding programs around the world.

The data of Khangildin (1), Marx (2), and Snoad (3) place aX in

chromosome 1 in the region of I.. My own findings confirm those presented

by others.

The following lines were used:

— Induced af ila mutant in cv. 'Wasata' (genotype: af Red I_)

— WL 1535 from Weibullsholm collection (genotype: Af red i)

—Variety 'Allround' (genotype: Af Red i)

The genetic analysis was carried out on F_ progeny derived from the

following crosses: a_f Red I (Wasata) x Af Red i. (Allround) and

af Red I (Wasata) x Af red i (WL 1535).

The crosses revealed the expected linkages, i.e. af-i and af-red.

The Cro value for genes af -1 was 8.3 ± 2.9, and for genes af-red

3.1 + 1.3 (Table 1). This compares with 14.5 ± 1.6% between af-1 as

determined by Snoad (3) and < 9% between af-red (1). It should be noted

that my data, like those of Marx (1), show a deficiency of red

segregants, thus evidently confirming the difficulty of scoring for red

in an af background.