diff --git a/src/main/java/org/generationcp/middleware/api/germplasm/pedigree/cop/CopCalculation.java b/src/main/java/org/generationcp/middleware/api/germplasm/pedigree/cop/CopCalculation.java
index 1e89dd4522..a0a7b7d4b8 100644
--- a/src/main/java/org/generationcp/middleware/api/germplasm/pedigree/cop/CopCalculation.java
+++ b/src/main/java/org/generationcp/middleware/api/germplasm/pedigree/cop/CopCalculation.java
@@ -248,7 +248,7 @@ public double coefficientOfInbreeding(final GermplasmTreeNode g) {
 		 *  D
 		 */
 		GermplasmTreeNode source = g.getMaleParentNode();
-		while (!isUnknown(source) && isDerivative(source)) {
+		while (hasSourceParent(source)) {
 			source = source.getMaleParentNode();
 		}
 		/*
@@ -388,7 +388,7 @@ private int countInbreedingGenerations(final GermplasmTreeNode g) {
 		}
 
 		int count = 1;
-		while (!isUnknown(source) && isDerivative(source) && !isUnknown(source.getMaleParentNode())) {
+		while (hasSourceParent(source)) {
 			count++;
 			source = source.getMaleParentNode();
 		}
@@ -540,6 +540,10 @@ private static boolean isUnknown(final GermplasmTreeNode node) {
 		return node == null || node.getGid() == UNKNOWN_GID;
 	}
 
+	private static boolean hasSourceParent(final GermplasmTreeNode source) {
+		return !isUnknown(source) && isDerivative(source) && !isUnknown(source.getMaleParentNode());
+	}
+
 	/**
 	 *
 	 * @param g1
diff --git a/src/test/java/org/generationcp/middleware/api/germplasm/pedigree/cop/CopServiceImplTest.java b/src/test/java/org/generationcp/middleware/api/germplasm/pedigree/cop/CopServiceImplTest.java
index 17a17eb533..faece176c6 100644
--- a/src/test/java/org/generationcp/middleware/api/germplasm/pedigree/cop/CopServiceImplTest.java
+++ b/src/test/java/org/generationcp/middleware/api/germplasm/pedigree/cop/CopServiceImplTest.java
@@ -153,6 +153,129 @@ public void testCoefficientOfInbreeding_KnownSource() {
 		assertThat(this.copService.coefficientOfInbreeding(p6.getGid(), BTypeEnum.SELF_FERTILIZING), is(31 / 32d));
 	}
 
+	/**
+	 * <pre>
+	 *   AA  BB  CC  DD
+	 *     EE      FF
+	 *         GG
+	 *
+	 * gid1 gid2 cop
+	 * "AA" "AA" 1
+	 * "BB" "AA" 0
+	 * "BB" "BB" 1
+	 * "CC" "AA" 0
+	 * "CC" "BB" 0
+	 * "CC" "CC" 1
+	 * "DD" "AA" 0
+	 * "DD" "BB" 0
+	 * "DD" "CC" 0
+	 * "DD" "DD" 1
+	 * "EE" "AA" 0.5
+	 * "EE" "BB" 0.5
+	 * "EE" "CC" 0
+	 * "EE" "DD" 0
+	 * "EE" "EE" 0.5
+	 * "FF" "AA" 0
+	 * "FF" "BB" 0
+	 * "FF" "CC" 0.5
+	 * "FF" "DD" 0.5
+	 * "FF" "EE" 0
+	 * "FF" "FF" 0.5
+	 * "GG" "AA" 0.25
+	 * "GG" "BB" 0.25
+	 * "GG" "CC" 0.25
+	 * "GG" "DD" 0.25
+	 * "GG" "EE" 0.25
+	 * "GG" "FF" 0.25
+	 * "GG" "GG" 0.5
+	 * </pre>
+	 *
+	 */
+	@Test
+	public void testCase_SelfFertilizingF2() {
+		this.btype = BTypeEnum.SELF_FERTILIZING;
+
+		final Germplasm aa = this.createGermplasm("AA", 0, 0, 0);
+		final Germplasm bb = this.createGermplasm("BB", 0, 0, 0);
+		final Germplasm cc = this.createGermplasm("CC", 0, 0, 0);
+		final Germplasm dd = this.createGermplasm("DD", 0, 0, 0);
+		final Germplasm ee = this.createGermplasm("EE", 2, aa.getGid(), bb.getGid());
+		final Germplasm ff = this.createGermplasm("FF", 2, cc.getGid(), dd.getGid());
+		final Germplasm gg = this.createGermplasm("GG", 2, ee.getGid(), ff.getGid());
+
+		assertThat(this.copService.coefficientOfParentage(aa.getGid(), aa.getGid(), this.btype), is(1d));
+		assertThat(this.copService.coefficientOfParentage(bb.getGid(), aa.getGid(), this.btype), is(0d));
+		assertThat(this.copService.coefficientOfParentage(bb.getGid(), bb.getGid(), this.btype), is(1d));
+		assertThat(this.copService.coefficientOfParentage(cc.getGid(), aa.getGid(), this.btype), is(0d));
+		assertThat(this.copService.coefficientOfParentage(cc.getGid(), bb.getGid(), this.btype), is(0d));
+		assertThat(this.copService.coefficientOfParentage(cc.getGid(), cc.getGid(), this.btype), is(1d));
+		assertThat(this.copService.coefficientOfParentage(dd.getGid(), aa.getGid(), this.btype), is(0d));
+		assertThat(this.copService.coefficientOfParentage(dd.getGid(), bb.getGid(), this.btype), is(0d));
+		assertThat(this.copService.coefficientOfParentage(dd.getGid(), cc.getGid(), this.btype), is(0d));
+		assertThat(this.copService.coefficientOfParentage(dd.getGid(), dd.getGid(), this.btype), is(1d));
+		assertThat(this.copService.coefficientOfParentage(ee.getGid(), aa.getGid(), this.btype), is(1 / 2d));
+		assertThat(this.copService.coefficientOfParentage(ee.getGid(), bb.getGid(), this.btype), is(1 / 2d));
+		assertThat(this.copService.coefficientOfParentage(ee.getGid(), cc.getGid(), this.btype), is(0d));
+		assertThat(this.copService.coefficientOfParentage(ee.getGid(), dd.getGid(), this.btype), is(0d));
+		assertThat(this.copService.coefficientOfParentage(ee.getGid(), ee.getGid(), this.btype), is(1 / 2d));
+		assertThat(this.copService.coefficientOfParentage(ff.getGid(), aa.getGid(), this.btype), is(0d));
+		assertThat(this.copService.coefficientOfParentage(ff.getGid(), bb.getGid(), this.btype), is(0d));
+		assertThat(this.copService.coefficientOfParentage(ff.getGid(), cc.getGid(), this.btype), is(1 / 2d));
+		assertThat(this.copService.coefficientOfParentage(ff.getGid(), dd.getGid(), this.btype), is(1 / 2d));
+		assertThat(this.copService.coefficientOfParentage(ff.getGid(), ee.getGid(), this.btype), is(0d));
+		assertThat(this.copService.coefficientOfParentage(ff.getGid(), ff.getGid(), this.btype), is(1 / 2d));
+		assertThat(this.copService.coefficientOfParentage(gg.getGid(), aa.getGid(), this.btype), is(1 / 4d));
+		assertThat(this.copService.coefficientOfParentage(gg.getGid(), bb.getGid(), this.btype), is(1 / 4d));
+		assertThat(this.copService.coefficientOfParentage(gg.getGid(), cc.getGid(), this.btype), is(1 / 4d));
+		assertThat(this.copService.coefficientOfParentage(gg.getGid(), dd.getGid(), this.btype), is(1 / 4d));
+		assertThat(this.copService.coefficientOfParentage(gg.getGid(), ee.getGid(), this.btype), is(1 / 4d));
+		assertThat(this.copService.coefficientOfParentage(gg.getGid(), ff.getGid(), this.btype), is(1 / 4d));
+		assertThat(this.copService.coefficientOfParentage(gg.getGid(), gg.getGid(), this.btype), is(1 / 2d));
+	}
+
+	@Test
+	public void testCase_SelfFertilizingF2WithIncorrectProgenitorNumberForF0() {
+		this.btype = BTypeEnum.SELF_FERTILIZING;
+
+		final Germplasm aa = this.createGermplasm("AA", -1, 0, 0);
+		final Germplasm bb = this.createGermplasm("BB", -1, 0, 0);
+		final Germplasm cc = this.createGermplasm("CC", -1, 0, 0);
+		final Germplasm dd = this.createGermplasm("DD", -1, 0, 0);
+		final Germplasm ee = this.createGermplasm("EE", 2, aa.getGid(), bb.getGid());
+		final Germplasm ff = this.createGermplasm("FF", 2, cc.getGid(), dd.getGid());
+		final Germplasm gg = this.createGermplasm("GG", 2, ee.getGid(), ff.getGid());
+
+		assertThat(this.copService.coefficientOfParentage(aa.getGid(), aa.getGid(), this.btype), is(1d));
+		assertThat(this.copService.coefficientOfParentage(bb.getGid(), aa.getGid(), this.btype), is(0d));
+		assertThat(this.copService.coefficientOfParentage(bb.getGid(), bb.getGid(), this.btype), is(1d));
+		assertThat(this.copService.coefficientOfParentage(cc.getGid(), aa.getGid(), this.btype), is(0d));
+		assertThat(this.copService.coefficientOfParentage(cc.getGid(), bb.getGid(), this.btype), is(0d));
+		assertThat(this.copService.coefficientOfParentage(cc.getGid(), cc.getGid(), this.btype), is(1d));
+		assertThat(this.copService.coefficientOfParentage(dd.getGid(), aa.getGid(), this.btype), is(0d));
+		assertThat(this.copService.coefficientOfParentage(dd.getGid(), bb.getGid(), this.btype), is(0d));
+		assertThat(this.copService.coefficientOfParentage(dd.getGid(), cc.getGid(), this.btype), is(0d));
+		assertThat(this.copService.coefficientOfParentage(dd.getGid(), dd.getGid(), this.btype), is(1d));
+		assertThat(this.copService.coefficientOfParentage(ee.getGid(), aa.getGid(), this.btype), is(1 / 2d));
+		assertThat(this.copService.coefficientOfParentage(ee.getGid(), bb.getGid(), this.btype), is(1 / 2d));
+		assertThat(this.copService.coefficientOfParentage(ee.getGid(), cc.getGid(), this.btype), is(0d));
+		assertThat(this.copService.coefficientOfParentage(ee.getGid(), dd.getGid(), this.btype), is(0d));
+		assertThat(this.copService.coefficientOfParentage(ee.getGid(), ee.getGid(), this.btype), is(1 / 2d));
+		assertThat(this.copService.coefficientOfParentage(ff.getGid(), aa.getGid(), this.btype), is(0d));
+		assertThat(this.copService.coefficientOfParentage(ff.getGid(), bb.getGid(), this.btype), is(0d));
+		assertThat(this.copService.coefficientOfParentage(ff.getGid(), cc.getGid(), this.btype), is(1 / 2d));
+		assertThat(this.copService.coefficientOfParentage(ff.getGid(), dd.getGid(), this.btype), is(1 / 2d));
+		assertThat(this.copService.coefficientOfParentage(ff.getGid(), ee.getGid(), this.btype), is(0d));
+		assertThat(this.copService.coefficientOfParentage(ff.getGid(), ff.getGid(), this.btype), is(1 / 2d));
+		assertThat(this.copService.coefficientOfParentage(gg.getGid(), aa.getGid(), this.btype), is(1 / 4d));
+		assertThat(this.copService.coefficientOfParentage(gg.getGid(), bb.getGid(), this.btype), is(1 / 4d));
+		assertThat(this.copService.coefficientOfParentage(gg.getGid(), cc.getGid(), this.btype), is(1 / 4d));
+		assertThat(this.copService.coefficientOfParentage(gg.getGid(), dd.getGid(), this.btype), is(1 / 4d));
+		assertThat(this.copService.coefficientOfParentage(gg.getGid(), ee.getGid(), this.btype), is(1 / 4d));
+		assertThat(this.copService.coefficientOfParentage(gg.getGid(), ff.getGid(), this.btype), is(1 / 4d));
+		assertThat(this.copService.coefficientOfParentage(gg.getGid(), gg.getGid(), this.btype), is(1 / 2d));
+	}
+
+
 	private Germplasm createGermplasm(final String name, final int gnpgs, final int gpid1, final int gpid2) {
 		final Name preferredName = new Name();
 		preferredName.setNval(name);