Unlocking the Potential: Deep dive into ocean of Ceramic Magnets.pptx
Rootstock of temperature fruits
1.
2. ANNAMALAI UNIVERSITY
FACULTY OF AGRICULTURE
DEPARMENT OF HORTICULTURE
Presented by,
S. SHARVESH
M. Sc. (Hort.) Fruit Science
Department of Horticulture
4. ROOTSTOCK
The lower part of the graft, which develops into root system of
the grafted plant.
It may be a seedling, a root cutting or a layered or micro propagated
plant.
SCION
It is the upper portion of the graft that will provide the shoot
system.
It should be of a desired cultivar and disease free.
INTERSTOCK
It is an intermediate plant part that is compatible with both
scion and the rootstock.
Used in cases where the scion and the rootstock are not directly
compatible with each other.
7. Characteristics of good rootstock
•It should be always compatible with scion variety.
•It should form successful graft union.
•Should exibit faster growth.
•It should be reasonably free from branching and suckering habit.
•It should produce strong root system.
•It should withstand a wide range of soils and climatic conditions.
•It can be easily propagated by cutting.
•It should have vigorous growth habit, healthy and resistant to
pests, disease and frost.
•It should have thick bark to hold the bud.
•It should support the budded plant to survive for a long time.
8. Classification of rootstocks
1. Seedling rootstock : raised from germinated seeds
Ex : Crab apple, Kainth, Wild apricot
Advantages:
Simple and economical
Do not retain viruses
Deeper root system
Disadvantages:
Longer juvenility phase , come to bearing late.
Variation
Difficult to manage
9. 2. Clonal rootstock: Propagated vegetatively
Ex : M9, M7, M27, Myrobalan B, Pixy
Advantages:
• Genetically same as the mother plant
• Easy to propagate
• Early bearing nature
• To preserve their special characteristics
Disadvantages:
• More no. of suckering habit
• Brittleness
10. FUNCTIONS OF ROOTSTOCK
1. Strong root system
2. Uptake of moisture and nutrients
3. Dwarfing
4. Earlier and precocious
5. Better flowering and fruiting
6. Tolerance to biotic and abiotic stress
7. Cold hardiness
8. Adverse soil and climatic condition
12. 1.APPLE(Malus domestica)
1. Seedling Rootstock:
• In Jammu and Kashmir, seeds are collected from wild
or crab apple variety called Trel is used as rootstock.
• Here seeds are subjected to stratification for 2-3
months at 4.4C .
• Then treated with 50ppm GA3 for better germination.
Ex: Crab Apple
2. Clonal Rootstock:
• Vegetatively propagated by Mound layering, Cutting,
Tissue culture.
• These are raised in closer spacing, after 1year head
back i.e. mound layering and allowed to develop.
After which separated and used as rootstock.
13. M9 Dwarfing, Precocious, HDP
M4, M7, MM106, M21, M24, M25, Semi dwarf
MM-111, MM-104 Semi Vigorous
Merton-793, Malling-12, 13, 16 Very Vigorous
M27(M13 * M9) Ultra Dwarf, HDP
MM106, M4, M7 Resistant to Wooly Apple Aphid, HDP
MM-111 Drought resistant, Resistant to Wooly
Apple Aphid
MM-104 Winter hardy clonal rootstock
M-26 Suitable for All type of soil
Some important clonal rootstocks
14. 2.PEAR( Pyrus communis)
• Kainth/mehal(P. pashia) : Most commonly used
seedling rootstock, vigorous, resistant to wooly
apple aphid.
• Shaira(P. serotine)
• Quince A : Most commonly used clonal rootstock
• Quince C : Most dwarfing rootstock
15. Bartlett pear on quince dwarfing rootstock is
mostly incompatible : ‘Old Home’ or ‘ Bearre hardy’
better interstock for compatibility.
16. 3. Peach(Prunus persica) :
• Seedling progenies of peach itself
• Wild Apricot : resistance to Root knot nematode
• Wild Almond
• Prunus behmi ( P. mira): Popular rootstock
• Prunus besseyi , Prunus tomentosa : Dwarfing
rootstock
