Table 1.
Summary of Data Underlying the Estimation of Maternal Proportions in Endosperm-Expressed Genes in Three Reciprocal Cross Types.
| Peruvianum cross | Hybrid cross | Chilense cross | |
|---|---|---|---|
| Statistic | (1616A ↔ 1616J) | (1616A ↔ 4329B) | (4329B ↔ 4329K) |
| Endosperm-expressed genes with SNPs in reciprocal cross | 8,654 | 4,289 | 2,646 |
| Alternative homozygous sites | 6,408 | 9,225 | 1,263 |
| Heterozygous sites (e.g., CC:AC) | 41,610 | 13,821 | 7,421 |
| Mean no. of SNPs per gene | 5.55 | 5.37 | 3.28 |
| Informative genes after filtering | 8,229 | 4,111 | 2,560 |
| Candidate MEGs | 351 | (570) | 40 |
| Candidate PEGs | 172 | (6) | 70 |
| Median maternal proportion (all SNPs) | 0.646 ↔ 0.684 | 0.843 ↔ 0.701 | 0.630 ↔ 0.643 |
| Median maternal proportion (only homozygous SNPs) | 0.645 ↔ 0.696 | 0.847 ↔ 0.708 | 0.645 ↔ 0.645 |
| Median maternal proportion (only heterozygous SNPs) | 0.649 ↔ 0.683 | 0.843 ↔ 0.702 | 0.625 ↔ 0.642 |
Note.—Median maternal proportions were computed across all “relevant” genes per cross type and parental SNP category. Due to the global (asymmetric) misregulation of endosperm expression in the hybrid cross, numbers of candidate MEGs and PEGs for this cross are given in parentheses.