diff --git a/api/forestry b/api/forestry
index cb7a1a618..73da80bca 160000
--- a/api/forestry
+++ b/api/forestry
@@ -1 +1 @@
-Subproject commit cb7a1a61811b3bb83c40a7448e709288c32b03d1
+Subproject commit 73da80bca5efde424a2a8921985ce919bc6ef0dd
diff --git a/src/main/java/forestry/core/genetics/ItemResearchNote.java b/src/main/java/forestry/core/genetics/ItemResearchNote.java
index deb3f408e..1c0719c5d 100755
--- a/src/main/java/forestry/core/genetics/ItemResearchNote.java
+++ b/src/main/java/forestry/core/genetics/ItemResearchNote.java
@@ -142,8 +142,8 @@ public class ItemResearchNote extends ItemForestry {
 					return false;
 				}
 
-				IAlleleSpecies species0 = encoded.getAllele0();
-				IAlleleSpecies species1 = encoded.getAllele1();
+				IAlleleSpecies species0 = (IAlleleSpecies) encoded.getAllele0();
+				IAlleleSpecies species1 = (IAlleleSpecies) encoded.getAllele1();
 				IAlleleSpecies speciesResult = (IAlleleSpecies) encoded.getTemplate()[root.getKaryotypeKey().ordinal()];
 
 				tracker.registerSpecies(species0);
diff --git a/src/main/java/forestry/core/genetics/mutations/Mutation.java b/src/main/java/forestry/core/genetics/mutations/Mutation.java
index 85cbaefda..b7666e66d 100644
--- a/src/main/java/forestry/core/genetics/mutations/Mutation.java
+++ b/src/main/java/forestry/core/genetics/mutations/Mutation.java
@@ -139,6 +139,16 @@ public abstract class Mutation implements IMutationCustom {
 		return species1;
 	}
 
+	@Override
+	public IAlleleSpecies getSpecies0() {
+		return species0;
+	}
+
+	@Override
+	public IAlleleSpecies getSpecies1() {
+		return species1;
+	}
+
 	@Override
 	public float getBaseChance() {
 		return chance;
diff --git a/src/main/java/forestry/core/utils/GeneticsUtil.java b/src/main/java/forestry/core/utils/GeneticsUtil.java
index 16f1dc954..c462fbfa8 100644
--- a/src/main/java/forestry/core/utils/GeneticsUtil.java
+++ b/src/main/java/forestry/core/utils/GeneticsUtil.java
@@ -192,14 +192,16 @@ public class GeneticsUtil {
 		exclude.add(species);
 
 		for (IMutation mutation : species.getRoot().getPaths(species, speciesChromosome)) {
-			if (!exclude.contains(mutation.getAllele0())) {
-				int otherAdvance = getGeneticAdvancement(mutation.getAllele0(), exclude, speciesChromosome);
+			IAlleleSpecies species0 = (IAlleleSpecies) mutation.getAllele0();
+			IAlleleSpecies species1 = (IAlleleSpecies) mutation.getAllele1();
+			if (!exclude.contains(species0)) {
+				int otherAdvance = getGeneticAdvancement(species0, exclude, speciesChromosome);
 				if (otherAdvance > highest) {
 					highest = otherAdvance;
 				}
 			}
-			if (!exclude.contains(mutation.getAllele1())) {
-				int otherAdvance = getGeneticAdvancement(mutation.getAllele1(), exclude, speciesChromosome);
+			if (!exclude.contains(species1)) {
+				int otherAdvance = getGeneticAdvancement(species1, exclude, speciesChromosome);
 				if (otherAdvance > highest) {
 					highest = otherAdvance;
 				}