Organic Name Reactions for the students and aspirants of Chemistry12th.pptx
Centre of origin, PRIMERY CENTRE OF ORIGIN , SECONDRY CENTER OF ORIGIN PLACE
1. centre of origin
by- ARVIND YADAV
ID – 721( batch :- 2017)
Banda University of Agriculture
Technology Banda
Email- arvindy2510@gamil.com
ARVINDY2510@BUAT721
2. Centre of origin
The concept of centre of origng is given by N. I. Vavilo
Primary centreof origin
primary centre of origin may be defend crop plant
evolved from wild species in the area showing great diversity
is known as primary centre of origin.
secondary centre of origin
secondary centre of origin may be defend as some area
certain crop species show considerable diversity of form
although, they have not originated from such area which are
secondary centre of origin.
3.
4. Eight maincentre are recognizedas proposed by vavilo
China
Hindustan
Central Asia primary centre of origin
Asia Minor
Mediterranean secondary centre of origin
Abyssinian
Central America south America
5. CHINA
This centre is the largest and oldest centre of origin.
It includes mountain parts of central and western china
besides
Example.
Pear - Pyrus communis
peach - Prunus persica
Mandarin - Citrus reticulata
plum - prunus salicina
6. Hindustan (India)
This centre includes Burma, Assam, Malayan ,Java, Borneo
This centre are divided into Indo- Burma, Siam-Malaya-
Java centre of origin
Example
Jackfruit Arcatocorpus hetrophylus
Mango Magifera indica
Coconut Cocus nucifera
Sour lime Citrus aurantifolia
Banana Musa spp.
7. CENTRAL ASIA
It is also known as Afghanistan centre of origin
It includes North west india, All Afghanistan
Example
Pistachio nut- Pistacia vera
Almond - prunus amygladus
Grape- Vitis venifera
Apple -Malus domestica
pyrus malus
some species of apricot
8. ASIA MINOR
This centre also known as Near East centre of origin And
Persian centre of origin
whole of Transcaucasia , Iran, and high lands of
Turkemenistan.
Primary centre of origin
Fig
Pomegranate
some spp. Of Apple Pyrus,Prunus,Grape
Secondary centre of origin
Chestnut
Pistachio nut
10. CENTRAL AMERICA
This centre included south Mexico and Central America
also known as Mexico centre of origin
Example
Papaya Carica papaya
Guava psidium guajava
Avocado Persia americana
11. SOUTH AMERICA
This centre includes the high mountain region of peru,
Bolivia ,Ecuator Colombia parts of Chile and Brazil and
whole of Paraguay.
Example
Pineapple
few spp. of Guava