This document discusses self-pollination in plants. It defines self-pollination as the transfer of pollen grains from the anther to the stigma of the same flower or a different flower on the same plant. There are two types of self-pollination: autogamy, where the pollen is transferred to the stigma of the same flower; and geitonogamy, where the pollen is transferred between different flowers on the same plant. Autogamy occurs through homogamy and cleistogamy and has the advantages of not depending on external pollinators and ensuring genetic purity, but has the disadvantages of not producing variation and weaker progeny.

1. Sub.:- Fundamentals of Plant Breeding
Course No. :- APB- 5211
Credit hours:- 3(2+1)
Lec. Topic :- Self Pollination ,mechanisms.
Presented by:-
Lt. Roshan Parihar, Asstt. Professor
Deptt.of Genetics&PlantBreeding
Indira Gandhi Krishi Vishwavidyalaya
Raipur, C.G.
BTC College of Agriculture & Research Station
,Sarkanda, Bilaspur,(CG)-495001

2. Why flowers pollinate?
• Toreproduce and create new life, which are
new flowers.

3. POLLINATION-
 The process of transfer of pollen grains from anther of a
flower to the stigma of same or different flower is called
pollination.

4. SOME IMPORTANAT TERMINOLOGY
1. MONOCEIOUS PLANTS:-When a flower contains both
stamens and pistils, the flower is said to be perfect. The
plant which contains perfect flowers is known as a
monoecious plant because it has both male and female
reproductive organs in the same plant
2. DIOCEIOUS PLANTS:-When a plant bears either
staminate flowers or pistillate flowers, the plant is
known as a dioecious plant.
 You can find only one type of flowers from a dioecious plant.
 Male and female reproductive organs are located in
separate plants.

5.  It is an essential step as it brings the male and
female gamete closer for fertilization.
 This process was first discovered by Camerarius in
1694.
 TYPES OF POLLINATION-
1. Self pollination / Autogamy
2. Cross pollination / Allogamy

7. Pollination
Self-pollination
• Pollen from
the anther is
transferred
to the stigma

8. Self-pollination

9. Self Pollination
• Bees and other animals bring pollen from the
flower’s own anthers to its stigma.

10. The bees collect the pollen from the Anther
and then gives it the Stigma

11. Patrick as editor
Miles as Researcher
Madison as Researcher
Aldrin as Artist
Jonathan as Music producer/ Bee

12. SELF POLLINATION:
 When the pollen grains are transferred from anther to
the stigma of same flower or a different flower
produced on the same plant is called Self Pollination.
Self Pollination
Autogamy Geitonogamy

13. AUTOGAMY
 It is a type of self pollination in which an intersexual
or perfect flower is pollinated by its own pollen.
 Autogamy occurs by 2 methods :
-Homogamy :The anthers and stigmas of
chasmogamous or open flowers are brought
together by growth, bending or folding.
-Cleistogamy : In cleistogamous flowers, the anthers
dehisce inside closed flowers. Growth of style brings
the pollen grains in contact with stigma. Pollination and
seed set are assured. Pollinators are not required.

14. CONTRIVENCE OR ADAPTAION FOR
SELF POLLINATION
1. MONOCLINY (Bisexuality):- It means flowers are
bisexual.
2. Homogamy:- when both the sex organs of flower
mature at the same time. Ex mirabilis
3. Cleistogamy :-In some plants, flowers never open up
and the anthers dehisce inside these closed flowers to
ensure pollination. Thus, cleistogamous flowers are
invariably autogamous as there is no chance of cross-
pollination. These flowers produce assured seed sets
even in the absence of pollinators, e.g., Oxalis

15. Autogamy:
 When the pollen grains are transferred from anthers
of a flower to the stigma of the same flower is called
as Autogamy.
 This takes place in bisexual flower.
 It occurs by cleistogamy and homogamy.

16. Geitonogamy:
 It is a kind of pollination in
which the pollen from the
anther of one flower are
transferred to the stigma of
other flower born on the same
plant.
 It occurs in plants with
monoecious condition.
 Eg- Maize

17. ADVANTAGES-
• The flowers do not depend on external agents.
• Minimum wastage of pollen grains.
• It maintains genetic purity.
• It is a sure process.
• Plants do not waste energy to produce special
devices to attract agents for pollination.
• It is more economical method.
DISADVANTAGES-
• New varieties can not be produced.
• Progeny becomes weaker due to lack
of mutation.
• Seeds have poor viability.
• There are no possibilities of
variation.