Báo cáo nghiên cứu nông nghiệp " Healthy Seed– Standards of Seed Supply and QualityAssurance " pptx

Healthy Seed – Standards of Seed Supply and Quality Assurance... Flowchart for seed into ATSCQuality control ATSC Specification Quality assessment Seed Supplier.i.e.. CSIRO collectors, p

Healthy Seed – Standards of Seed Supply and

Quality Assurance

Managing quality

• Quality control procedures

• Processes to ensure ‘quality’

• Quality assessment

• Processes to measure ‘quality’

Flowchart for seed into ATSC

Quality control ATSC Specification Quality assessment

Seed Supplier.i.e CSIRO collectors,

private collectors and other gov'n organisations from Australia and overseas

Botanical Seed type correlated field

Specimens Individuals and bulk collection data

Reclean Registration Number for

What’s a provenance?

• Geographic origin of particular seed or plants

• Population of plants at a location

• Sub-set of species diversity and adaptability

E camaldulensis: northern provenances

16 19 22

15

24 23

21

17 18 14

20

E camaldulensis provenances:

Petford region

Cairns

Innisfail Atherton

8

17°

E camaldulensis provenances near Petford, Queensland,

grown at Chachoengsao, Thailand 2 year volumes

Remnant bushland can have:

• Reduced species mix

• Reduced genetic base

Open-pollinated eucalypt family - mix

of outcrossed, inbred progeny

20% selfs

70% outcrossed

10% inbred (relative mating)

seed

pollen

pollen

pollen

Sampling technique for wild

provs

• Understand taxonomy and

distribution of genetic diversity

• Maximise genetic diversity in

Self-fertilised family - inbreeding

depression of growth

seed pollen

Inbreeding problems

Matching seed source to end use

• Assisted regeneration - natural seed source

• Revegetation - suitable species, adapted seed source

• Conservation – broad genetic base, species diversity

• Land management (degraded soils) - select material

• Commercial production – selected and improved

Factors affecting seed longevity

• Seed category: Orthodox

seed/recalcitrant

• Temperature

• Moisture

• storage atmosphere

Purpose of seed testing.

• Assess and monitor the physical quality of the

seed from the time of collection through to

sowing

• This monitoring, enables optimum storage

temperatures at a species level to be determined

Maximising the life of seed in the seed bank

• ATSC follow modified International Seed Testing

Association (ISTA) rules for our specific needs

• Determine if a seedlot should be stored or

discarded

Principle components of seed

Sampling and mixing

Purity

• Majority of species at the Australian

Tree Seed Centre do not have seed

dormancy

• Types of dormancy:

– seed coat dormancy e.g Acacia

– physical dormancy e.g Macadamia

– embryo dormancy e.g E delegatensis

Germination testing

• Moisture content

• Vigour

Seed storage at the ATSC

• ATSC active seed store containing

approximately 800 species and 13000

accessions.

• Purpose: act as a gene bank resource for

Australian woody flora whereby, seed

viability is maintained as long as possible.

• Seed is held in stock until exhausted via

consignment or discarded due to poor

viability and vigour.

Treat Quality Seed Like Fine

Wine

• Start with a quality product

• Provide an ideal storage environment

• Protect from Pests

• Reap the Rewards