TABLE 1

Observed genotypic numbers for three ETS genes in F2 progeny from interpopulation crosses of Tigriopus californicus between Abalone Cove (AB) and San Diego (SD)

No. of genotypic classMale vs. female χ2
ETS gene and reciprocal crossSex/stageaSD/SDAB/SDAB/ABPbc1:2:1 χ2P
CYC-ABm × SDfFemale35121324.290.11
Male4612120
M + F812425236.2<0.0001*
Nauplii5079482.080.35
CYC-ABf × SDmFemale32123291.27>0.5
Male3313222
M + F652555153.1<0.0001*
Nauplii5087480.70>0.5
CYC1-ABm × SDfFemale25125380.67>0.5
Male3112036
M + F562457437.0<0.0001*
Nauplii38104365.10.078
CYC1-ABf × SDmFemale131244917.60.0001*34.6<0.0001*
Male40115358.70.013
M + F532398432.8<0.0001*
Nauplii50100334.70.094
RISP-ABm × SDfFemale34122270.71>0.5
Male2911241
M + F632346829.2<0.0001*
Nauplii4588440.014>0.5
RISP-ABf × SDmFemale33130188.210.01637.0<0.0001*
Male291223916.40.0003*
M + F622525747.8<0.0001*
Nauplii4397410.98>0.5
  • M, male; F, female.

  • a Female and male are F2 adults, while nauplii are first-stage nauplii.

  • b The significance of deviations from expected Mendelian 1:2:1 ratio and equal genotypic ratios between sexes was tested with contingency χ2-tests and P-values were computed with 2 d.f. P-values <0.05 are indicated in italics.

  • c Application of the sequential Bonferroni method to the data yields a critical P-value of 0.004 (α = 0.05); an * denotes values exceeding this significance threshold.