Field bean

Floral biology and breeding techniques

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2. LABLAB
•FLORAL BIOLOGY
•SELFING
•EMASCULATION
•CROSSING
BY
MANJUNATH HARTI
Jr M.Sc (agri)
ID NO-PAK 9211
DEPT OF GPB
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•Scientific Name:Dolichoslablab(L).
•Family : FABACEAE
•Chromosome No.: 2n = 2x= 22

4. TAXONOMY
•Botanical name : Dolichoslablab
•Order :Fabales
•Family :Fabaceae
•Sub-family :Faboideae
•Genus :Dolichos
•Tribe :Phaseoleae
•Sub-tribe :Faboideae
•Species :Lablab
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5. USES
The crop is multipurpose.
•Grown for its young pods .
•Dry seeds are used in many preparation.
•As fodder
•As green manure
•As cover crop
•As ornamental in USA
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6. •Is a native to India or South-East Asia. It is probably of an
Asian origin and has been under cultivation since ancient
times. Its wild forms are found in India
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•D. lablab
•D. purpureus
•D. albus
•D. cultratus
•D. bengalensis
•D. lablab var
hortensis
•D. lablab var
muschler
•D. lablab var
schweinf

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FLORAL
BIOLOGY
FLORAL
MORPHOLOGY
FLORAL
ANTHESIS

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•Infloresence is a stiff axillary raceme
with many flowers.
•Flowers 1-5 together form tubercles
on rachis.
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•Flowers are in various colours.
•In clusters of 4-5.
•Two large basal bracts.
•Stamens are diadelphous(9+1)
•Stigma is capitate & glandular
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•Starts in morning around 6 am and continues till 11 am
•Maximum flower opening –11am to 5 pm

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•Essentially a Self Pollinatedcrop
was chasmogamy.
•Self pollination varies between
94 -99%

15. •But 6-10% Natural Cross
pollinationhave been
reported depending on
•Temperature
•Insect population &
activity at flowering time
•Planting design
•Plant population
•Wind velocity & direction
•Genotypic nature
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•Bagging of young bud
•In this crop 6-10% cross
pollination is observed.

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•Includes
•Emasculation
•Artificial pollination
•Bagging
•Taging

18. •It is the removal of male part from the bisexual
flower.
•Use sharp forceps & needles.
•A cut with thumb is made on the ventral side to 2/3
of the bud and tips are clipped off
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20. CROSSING
•Take well opened flower.
•Gently push the back of the flower & get the
pollens.
•Then put pollens on emasculated flower.
•Then bag it.
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•Success rate –33%
•Depends upon temperature and humidity
•Emasculation carried out before noon
•Pollinate the emasculeted flowers on the same day or
following day.

23. VARIATION
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24. IMPROVED VARIETIES
•Rongai
•Highworth
•Koala
•Endurance
•HA-4
•Hebbal avare-1
•Hebbal US.67-31
•Hebbal avare-4
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