Table 4.

Analysis of compound QTL (qTA5a and qTA5b) diplotypes in seven full-sib peach families for their average titratable acidity (TA) content from the two environments CA11 and CA12. Haplotypes that seemed to be associated with a Q-allele for increased TA are in bold. Underlined TA-values are deviating from the proposed genetic model in which qTA5a shows recessive inheritance and where expression of qTA5b requires qTA5a to be-QQ

			qTA5a
FS-Family		Diplotype	TA					Individual count
			H3H4	H3H5	H2H4	H2H5	Total	H3H4	H3H5	H2H4	H2H5	Total
TX2B136 × Y434–40	qTA5b	H1H3	0.42	–	0.75	0.98	0.71	6	–	4	2	12
		H1H6	0.58	0.60	1.35	1.45	0.99	2	4	1	5	12
		Total	0.50	0.60	1.05	1.21	0.85	8	4	5	7	24
		Conclusions: 1) qTA5a: Effect H2 > H3, H4 ≡ H5 2) qTA5b: Effect H6 > H3, Effective only in the presence of qTA5a-H2
			H1H4	H1H5	H2H4	H2H5	Total	H1H4	H1H5	H2H4	H2H5	Total
TX2B136 × Y435–246	qTA5b	H1H3	0.45	0.40	0.70	–	0.52	2	1	2	–	5
		H2H3	0.30	0.50	–	1.05	0.62	1	1	–	1	3
		H2H6	0.53	0.20	0.95	–	0.56	3	1	1	–	5
		Total	0.43	0.37	0.83	1.05	0.56	6	3	3	1	13
		Conclusions: 1) qTA5a: Effect H2 > H1, H4 ≡ H5 2) qTA5b: None, too few pairwise comparisons
			H1H2	H1H4	H2H2	H2H4	Total	H1H2	H1H4	H2H2	H2H4	Total
Victor × Y426–371	qTA5b	H1H3	0.38	0.35	0.90	0.77	0.60	3	3	1	3	10
		H1H5	0.43	0.30	1.08	0.97	0.69	7	2	2	8	19
		Total	0.41	0.33	0.99	0.87	0.65	10	5	3	11	29
		Conclusions: 1) qTA5a: Effect H2 > H1, H2 ≡ H4, H2 at single dose has no effect 2) qTA5b: H5 possibly slightly > H3 in some genetic backgrounds
			H1H2	H1H4	H2H2	H2H4	Total	H1H2	H1H4	H2H2	H2H4	Total
Victor × Y435–246	qTA5b	H1H3	–	0.35	0.80	–	0.58	–	1	1	–	2
		H1H5	0.35	0.55	–	–	0.45	1	1	–	–	2
		H2H3	–	–	–	0.85		–	–	–	2	2
		H2H5	0.40	0.30	0.85	–	0.52	1	1	4	–	6
		Total	0.38	0.40	0.83	0.85	0.51	2	3	5	2	12
		Conclusions: 1) qTA5a: Effect H2 > H1, H2 at single dose has no effect 2) qTA5b: None, too few pairwise comparisons
			qTA5a
FS-Family		Diplotype	TA					Individual count
			H1H4	H1H5	H2H4	H2H5	Total	H1H4	H1H5	H2H4	H2H5	Total
TX2B136 × Galaxy	qTA5b	H1H3	0.30	0.35	0.98	–	0.54	1	1	2	–	4
		H1H6	0.50	1.05	–	1.63	1.06	1	1	–	3	5
		H4H6	0.33	–	1.00		0.67	3	–	2		5
		Total	0.38	0.70	0.99	1.63	0.76	5	2	4	3	14
		Conclusions: 1) qTA5a: Effect H2 > H1, 2) qTA5b: None, too few pairwise comparisons H6 > H3
			H3H4		H2H4		Total	H3H4		H2H4		Total
TXW1490_1 × Y434–40	qTA5b	H1H3	0.39		1.03		0.71	4		11		15
		Total	0.39		1.03		0.71	4		11		15
		Conclusion: qTA5a: Effect H2 > H3
			H1H4		H2H4		Total	H1H4		H2H4		Total
TXW1490_1 × Y435–246	qTA5b	H1H3	0.33		0.75		0.54	2		3		5
		H1H6	0.70		0.88		0.79	1		2		3
		Total	0.52		0.82		0.67	1		2		8
		Conclusion: None, too few data