Segregation of <i>ASHH2/ashh2</i> in reciprocal crosses with wt.

aTransmission of mutant allele (T) was calculated as T(observed)/T(expected). bTransmission efficiency (TE) calculated as observed number of transmitted mutant alleles (TEobs)/expected number of transmitted mutant alleles (TEexp). TEexp for the mutant allele correspond to the observed number of WT alleles transmitted in the reciprocal cross (Howden et al., 1998). cExpected frequency of defective male or female gametophytes in a ASHH2/ashh2 plant. Δ = 0.5 (1-TE)×100%. dExpected frequency of homozygous plant calculated from TE(obs)female and TE(obs)male.