Acta 93.indd - Výzkumný ústav Silva Taroucy pro krajinu a okrasné ...

Table 7 Percent relative vitality of genotypes with one or two aurea alleles compared to green-leavedtype in inbred and their related hybrid progenies of Pelargonium × hortorumHybrids andtheirgolden parentsExpectedrelativevitality in %Observed relative vitality (v) in %GreenplantsAur + /Aur +GoldenplantsAur + /Aurl.yellowplantsAur/AurTotalplantshybrid 439 100:100 100 100 300male 167 selfed 1 100:100:100 100 102 52 185male 167 selfed 2 100:100 100 102 158hybrid 221 100:100 100 93 600hybrid 338 100:100 100 92 600male 22 selfed 1 100:100:100 100 79 72 431male 22 selfed 2 100:100 100 79 337hybrid 246 100:100 100 92 600female 243 selfed 1 100:100:100 100 83 45 152female 243 selfed 2 100:100 100 83 130hybrid 324 100:100 100 85 600female 207 selfed 1 100:100:100 100 95 90 232female 207 selfed 2 100:100 100 95 177hybrid 405 100:100 100 57 600male 346 selfed 1 100:100:100 100 62 32 285male 346 selfed 2 100:100 100 62 2491evaluated 1 week after sowing2evaluated 3 weeks after sowingRelative vitality (v) expressed in percent was determined as follows: (number of golden plants / number of greenplants) × 100 for the segregation ratio 1:1, as [number of golden plants /(number of green plants × 2)] × 100 forheterozygote class for the ratio 1:2 or 1:2:1 and as (number of light yellow plants / number of green plants) × 100for the homozygous light yellow class for segregation ratio 1:2:1. Relative vitality was calculated from data in Table 6.caused by a deficit in the category of golden-leaved plants.In hybrid progenies there was not a substantial difference ifthe golden-leaved component is used as a male or as a femaleparent. This fact corresponds to the nuclear character of thegene.In the phase of cotyledons (i.e. after the 1 st effective phaseof the aurea gene) the selfed golden-leaved lines (Aur + /Aur) mostly had differently altered segregation ratios witha reduction in categories containing lethal alleles (1 Aur + /Aur + :