Evaluating Strawberry Breeding Selections for Field and Postharvest Fruit Decay

Figures & data

TABLE 1 Percentage decay of fruit from 58 strawberry genotypes evaluated in 2010 in a field on the North Farm of the USDA-ARS Beltsville Agricultural Research Center ^z

	Field decay			Postharvest decay
Genotype	Percentage	Letter grouping	Disposition	Percentage	Letter grouping	Disposition
B1893	5	rst	Select	56	ijlmnoqrs
MNUS796	6	pqrst	Select	48	mnoqrstuvw	Select
B1901	6	tu	Select	52	jlmnoqrstuv
B1789	6	qrst	Select	50	jlmnoqrstuv
MNUS674	6	st	Select	33	uvw	Select
MNUS818	6	opqrst	Select	45	mnoqrstuvw	Select
Ovation	7	klmnopqrst	Select	58	defghijlmno
B1320	7	mnopqrst	Select	52	ijlmnoqrstu
Chandler	8	t	Select	55	ijlmnoq
MNUS691	8	mnopqrst	Select	59	fghijlm
B1693	8	mnopqrst	Select	30	w	Select
MNUS950	8	hijkmnopqrst	Select	49	jlmnoqrstu
B1806	8	jkmnopqrst	Select	33	uvw	Select
Earliglow	8	ijkmnopqrst	Select	58	efghijlmno
B1816	8	st	Select	57	ijlmnoqr
B1033	8	kmnopqrst	Select	74	abcdefgh	Discard
B1572	8	ghijkmnopqrst	Select	37	stuvw	Select
B1807	9	mnopqrst	Select	38	tuvw	Select
B1818	9	mnopqrst	Select	40	qrstuvw	Select
B1773	9	nopqrst	Select	48	lmnoqrstuvw	Select
B1786	9	hijkmnopqrst	Select	47	jklmnoqrstuvw	Select
B1610	10	ghijkmnopqrst	Select	68	cdefghik
B1838	10	efghijkmnopqrsu	Select	49	lmnoqrstuv
Darselect	11	fghijkmnopqrst	Select	47	lmnoqrstuv
B1458	11	efghijkmnopqrst	Select	78	abcd	Discard
B1752	11	efghijkmnopqrst	Select	39	stuvw	Select
B1915	11	efghijkmnopqrst	Select	49	lmnoqrstuv
B1792	12	efghijkmnopqrst	Select	77	abcd	Discard
B1580	12	defghijkmno		55	ijlmnoqrst
EM995	12	efghijkmno		41	rstuvw	Select
B1824	13	efghijkmnop		47	lmnoqrstuv
B1465	13	efghijkmnopqr		50	ijlmnoqrstu
B1813	13	efghijkmnopqr		44	mnoqrstuvw	Select
LL0311-43	13	efghijkmnopqrst	Select	48	mnoqrstuv	Select
Record	13	efghijkmnopqrst	Select	61	efghijlmn
B1754	13	cdefghij		55	ijlmnoq
B1463	13	efghijkm		54	ijlmnoqrst
B1839	13	efghijkmnopqrs		51	ijlmnoqrstuv
B1775	13	efghijkmnopqr		80	abc	Discard
B1805	14	cdefghijkmnopq		30	vw	Select
B1570	14	defghijkmn		40	oqrstuvw	Select
Northeaster	14	defghijl		58	ijlmno
B1835	15	efghijkmnop		75	abcdefh	Discard
LL0220-10	15	defghij		59	gijlmnp
Eros	16	abcde	Discard	52	jlmnoqrstuv
B1755	16	cdefgh		72	bcdefghi
Cle des Champs	16	cdefghi		46	mnoqrstuvw	Select
B1590	17	cdefghijl		37	uvw	Select
AC^® Wendy	17	cdefg		86	ab	Discard
B927	18	cdefghijk		76	abcdefg	Discard
B1464	19	bcdef		78	abc	Discard
B1796	19	abcde	Discard	67	cdefghij
B1820	20	abcde	Discard	58	gijlmnp
B1095	21	abcd	Discard	64	defghijl
Allstar	24	ab	Discard	42	noqrstuvw	Select
B1787	25	abc	Discard	40	tuvw	Select
B1844	25	ab	Discard	88	a	Discard
B1540	26	a	Discard	76	abcde	Discard
Average	13			54
^zAnalyses of variance were conducted to obtain estimates of means and means separations for percentage decay in the field at harvest and also after storage (postharvest). Means separations were used to determine dispositions. Genotypes with the highest levels of decay (means followed by the letter “a”) would be discarded. Genotypes with the lowest levels of decay (“t” for field decay, and “w” for postharvest decay) would be selected to use as parents to develop genotypes with lower percentages of decay.

FIGURE 1 Daily total rainfall (mm) and minimum relative humidity (%) during the strawberry fruiting season at the USDA-ARS Beltsville Agricultural Research Center, Beltsville, MD, in 2010 (George Meyers, BARC-RSS, personal communication, December 2010), plus percentage decay of fruit from 58 strawberry genotypes evaluated at each of nine harvest dates from 10 May through 7 June 2010. Percentage decay in the field was calculated at each harvest for each of three plots of each genotype from the weight of fruits harvested separately into a container of decayed fruit and a container of fruit showing no signs of decay. Fruits from these harvests were placed into containers and stored at 5°C for 9 to 12 days. After storage, the percentage decayed fruit was calculated from the number of decayed fruits and the total number of fruits.

TABLE 2 Total yield and percentage of yield lost due to decay in the field or after storage at 5°C of fruit from 58 strawberry genotypes evaluated in 2010 in a field on the North Farm of the USDA-ARS Beltsville Agricultural Research Center ^z

Genotype	Yield (lbs/A)	Letter grouping	Total percentage decay	Marketable yield (lbs/A)
B1805	21,489	abcdefghijk	40	12,958
B1838	25,273	abcde	54	11,578
B1463	28,563	ab	60	11,415
B1806	17,723	defghijklmno	38	10,935
Eros	26,451	abcd	59	10,742
MNUS796	21,737	abcdefghij	51	10,673
B1754	24,390	abcdef	61	9,467
Allstar	21,315	bcdefghijkl	56	9,417
B1807	16,244	efghijklmnopq	43	9,276
B1752	17,134	efghijklmno	46	9,265
MNUS674	14,654	ghijklmnopqr	37	9,190
B1580	22,752	abcdefghi	60	9,032
B1789	19,200	cdefghijklmn	53	8,994
MNUS950	18,915	cdefghijklmn	53	8,814
Darselect	18,061	defghijklmno	53	8,539
EM995	16,289	efghijklmnopq	48	8,428
B1320	18,608	cdefghijklmn	55	8,338
Cle des Champs	18,320	cdefghijklmno	55	8,311
B1824	17,498	defghijklmno	54	8,099
B1901	17,563	defghijklmno	54	8,023
B1915	17,644	defghijklmno	55	7,939
B1570	14,998	ghijklmnopqr	49	7,692
B1818	13,124	jklmnopqr	45	7,192
Record	20,990	bcdefghijklm	66	7,049
LL0220-10	20,027	bcdefghijklm	65	6,982
B1465	15,991	efghijklmnopq	56	6,965
B1590	13,203	jklmnopqr	47	6,956
B1572	12,123	klmnopqr	43	6,954
MNUS818	13,366	ijklmnopqr	48	6,898
B1813	13,587	ijklmnopqr	51	6,659
Northeaster	16,939	efghijklmnop	64	6,072
B1693	9,174	opqrs	35	5,936
B1095	20,605	bcdefghijklm	71	5,911
LL0311-43	12,859	jklmnopqr	54	5,859
MNUS691	14,938	ghijklmnopqr	62	5,617
B1610	19,080	cdefghijklmn	71	5,552
B1839	12,865	jklmnopqr	57	5,509
B1893	13,054	jklmnopqr	58	5,422
B1816	13,294	jklmnopqr	60	5,302
B1458	27,395	abc	81	5,290
B1792	24,010	abcdefg	80	4,872
B1820	13,930	hijklmnopqr	66	4,685
Ovation	11,983	lmnopqr	61	4,661
B1787	10,400	nopqrs	55	4,648
B1033	19,285	cdefghijklmn	76	4,563
Earliglow	11,583	mnopqr	61	4,462
Chandler	10,148	nopqrs	58	4,219
B1464	23,258	abcdefgh	82	4,147
B1796	15,424	fghijklmnopqr	73	4,092
B1540	20,699	bcdefghijklm	82	3,708
AC^® Wendy	30,353	a	89	3,435
B1773	7,286	qrs	53	3,431
B1786	6,617	rs	52	3,190
B1755	12,470	jklmnopqr	76	2,956
B1835	13,773	ijklmnopqr	79	2,910
B1775	11,625	mnopqr	83	2,034
B927	7,743	pqrs	80	1,548
B1844	13,077	jklmnopqr	91	1,209
Average	16,916		60	6,621
^zAn analysis of variance was conducted to obtain estimates of genotypic means and meansseparations (designated by letters following estimates of means) for total fruit yield. Marketable yield was calculated from the total yield and the percentage lost from decay both in the field and after storage.