Selection and testing of conifers - Field testing programme

		SS	SP	LP	CP	LA	DF	BL
Progeny tests (total)	Year in which testing began	1953	1957	1966	1964	1959	1959	1953
	No. of years in which planting took place	32	20	19	7	26	15	4
	Total tests:	392	143	156	38	72	48	133
	Successful tests	360	132	143	34	59	409	13
Half-sib testing	Total no. of families in test	2594	1174	578	935	330	601	179
	On 2 or more test-sites	2525	1105	562	443	195	557	121
	On 1 test-site only	69	69	16	492	115	44	58
	Percent base population screened	90	86	12	92	39	70	77
Full-sib testing	Total no. of families in test	446	360	1101	28	270	46	-
	On 2 or more test-sites	404	325	1109	26	182	20	-
	On 1 test-site only	42	35	82	2	88	26	-
	_ parents used in crosses	100	96	855	7	94	11	-
	_ parents used in crosses	84	90	766	7	48	24	-
	Unique parents used	120	114	1563	7	116	24	-
Clonal testing	Total no. of clones in test	428	-	-	-	4	-	-
	On 2 or more test-sites	285	-	-	-	3	-	-
	On 1 test-site only	143	-	-	-	1	-	-

Notes

SS: only�includes only pure Sitka spruce used in breeding for improved commercial material. Hybridisation work and specific thoeretical plantings such as the Population Study are excluded.
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SP: Scots pine
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LP: The main effort in lodgepole pine breeding has been through the testing of single-pair full-sib families. Half-sib evaluation has been limited.
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CP: Because Corsican pine is used on a limited range of site-types, the 492 selections tested on one site only are regarded as adequately tested for these species.
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LA: Larch�includes both European and Japanese larch in hybrid families only.
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DF: A major programme of half-sib testing of 326 families over 2 years was initiated in Douglas fir in 1994-5.
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BL: Broadleaves include beech and oak only. 64% of beech selections were in test when the last trials were planted in 1974. 80 recent oak selections are all in test.

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