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45 Cards in this Set
- Front
- Back
list 4 ways for generalized tree improvement |
- the selection cycle - selection methods -attibutes selected ( Genetic worth , Growth, Density, pest Resistance - production methods |
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leader in tree breeding in BC |
- forest genetics council of BC -select seed ltd - tree improvement branch ( tree seed centre, SPAR) - research, innovation and knowledge management branch - ARBORGEN * - seed orchard managers |
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seed and vegetative material for reforestation of crown land is _________ ________ by legisltation in BC |
Strongly controlled |
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Genetic material collected after April 1, 2005 |
Controlled by Chief Forestrs standard for seed use |
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Genetic material collected before April 1 2005 |
controlled by forest practices code of BC act |
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Forest practice code of BC act |
- tree, cone, seed and vegetative material regulation - timber harvesting and silv practice regulation sectoin 38 - seed and vegetative materail guidebook |
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although difference between Forest practice code of BC act and Chief foresters standards is not great. what can be of importance of the 2 |
where supplies of seed are limiting |
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section 8 of chief foresters standards describes 6 classes of genetic material |
- natural stand - untested parent material - superior provencance - tested parent trees -custom lot ( phone tree breeder. - non BC sources |
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rules governing use of seeds described in terms of |
seed planting zones and transfer limits |
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SPZ |
natural stand seed planting zone |
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BGC |
Biogeoclimatic zone |
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SPAR |
seed planting and registry system |
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genetic material used ____ __ _____ _____ specfied by regulationcan be used to reforest crown land |
according to transfer limits |
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all genetic material used to reforest crown land must be ______________ |
Registered by the :
MINISTRY OF FORESTS and STORED AT THE TREE SEED CENTRE ********** |
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seed coat |
doramrancy? stratification |
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Can GMO's be registered ? |
NO |
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can collections from planation be registered? |
NO |
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Can mixed be registered? |
NO |
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each unique collection of genetic material is _____________ |
assigned a seedlot number or vegetative lot number and transfer limits |
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natural stand collection must be from one ________, one ______ within an 8 km radius, and within __________ ________ _________ |
1. seed planting zone 2. Biogeoclimatic zone 3. prescribed elevation limits |
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minimal parents contribution is ____ trees for natural stands |
10 |
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genetic material must be used according to |
regulations |
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______ must be kept where material is used and _________ to _________ ( with maps ) __________ |
1. records 2. reported 3. government 4. annually |
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best available genetic quality must ______ |
be used first |
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best available genetic material is the seedlot/ cutting lot listed on SPAR with what 4 attibutes? |
1. highest genetic class and genetic worth 2. of preferred species to be planted ( listed as preferred in stocking standards) 3. meet transfer rules for use in a specified location 4. available surpluss ( SPAR code for 'on sale") |
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Genetic worth |
is a ranking system for breeding attributes |
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what are the 3 parameters for genetic worth? |
1. Growth 2. wood relative Densisty 3. pest Resistance |
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what is genetic worth expressed in |
as a % increase compared to natural stand average |
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____ % of material used by a ______ in any year must comply with regulations. |
1. 95% 2. Licensee |
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Penalty for non compliance of transfer limits |
$5000 as well can include having to do site prep and replant |
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Seed planting zones SPZ are |
areas which genetic material may be used |
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SPZ's are similar to _____ and strongly reflect ______________________________ |
- bec zones - our understanding of ecosystem funtioning |
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what are the 2 types of SPZ's |
1. for material from natural stands 2. from tested parent trees |
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What are some limiting factors for SPZ's |
- elevation - latitude - longitude - BEC zones |
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SPU |
seed planning units ( planned area of use) |
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although SPZ and SPU are similar, what is a difference |
SPU's may vary in extent because of confidence gained through testing |
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seed planning and registry system ( SPAR) is.. |
operational medium of communication about genetic material in BC |
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what are the 6 classes of genetic materials grouped in spar listed as in Genetic classes ( hint -- 3 letters) |
B, B+ , A
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seedlot info from SPAR : - B - TOD ( tompson okanogan dry) - 1050m/850m/1550m - 50 49 / 49 49 / 52 49 - 120 03/ 118 03/ 123 03 - IDF mw |
- Genetic Class - Seed planting zone - use elevation mean/ min/ max - use late mean/ min/ max - use long mean/ min/ max - BEC zone |
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ID soil characteristics - dark brown ( 7.5YR 2.5/2) -L-SL - moderate, medium, granular, - very friable - 24% CF - clear, wavy - 6-45 cm - 5.7 |
-munsell colour -texture - structure - consistency - coarse frag - boundary - thickness - Ph |
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Identify 3 conventional stand density control treatments and at what approx what stand density do they occur. |
1.Espacement - densisty control at regen - Relative density = 0 - tree characteristic = none 2. Juvenile spacing/ pre comm thinning RD = around 0.15 . almost always < .40 T C = between 100% LC and 50 % LC = DIA < 15 cm 3. Commercial thinning RD = > .40 and < .55 ( ZICM line) T C = LC > or equal to 30 % |
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Identify 3 general self thinning patterns of fully stocked, even aged, single canopy layer stands. Indicate which patter stand density control is strongly reccomended |
1. without much competition being experienced by dominent trees
Density control reccomended- seldom ( lose mark if yes) 2. dominent trees experience high levels of comp. but site remains fully occupied with reasonable vigorous crop trees DC -- Possibly - seldom 3. crowns on all trees are greatly reduced during prolonged periods of very high comp levels and results in clumpy mortality // or repression, stagnation DC -- YES ( lose mark if no ) ** |
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dominent tree attributes vary greatly with stand density YES or NO - size of juvenile core - DIA - height |
- YES - YES -NO |
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list 5 simple, cost effective things that effect stand yield that can strongly be strongly influenced by silv management |
-regen delay - desired species - desired genetics - site occupancy - veg. control - merchantability limits - full stocking |
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define or describe a fully stocked stand, what are units of stand measurment variable used to define a fully stocked stand? |
- a range of stand densities that produce virtually the same volume - defined with # trees / ha and mean tree volume m 3 - BA/ ha - m3/ha/yr |