field bean
TRANSCRIPT
1 1
LABLAB• FLORAL BIOLOGY
• SELFING
• EMASCULATION
• CROSSING
BY
MANJUNATH HARTI
Jr M.Sc (agri)
ID NO-PAK 9211
DEPT OF GPB 2
3
• Scientific Name :Dolichos lablab (L).
• Family : FABACEAE
• Chromosome No. : 2n = 2x = 22
TAXONOMY
• Botanical name : Dolichos lablab
• Order :Fabales
• Family :Fabaceae
• Sub-family :Faboideae
• Genus :Dolichos
• Tribe :Phaseoleae
• Sub-tribe :Faboideae
• Species :Lablab
4
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
5
• 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
6
7
• D. lablab
• D. purpureus
• D. albus
• D. cultratus
• D. bengalensis
• D. lablab var
hortensis
• D. lablab var
muschler
• D. lablab var
schweinf
8
FLORAL
BIOLOGY
FLORAL
MORPHOLOGY
FLORAL
ANTHESIS
9
10
• Infloresence is a stiff axillary raceme with many flowers.
• Flowers 1-5 together form tubercles on rachis.
10
11
• Flowers are in various colours.
• In clusters of 4-5.
• Two large basal bracts.
• Stamens are diadelphous(9+1)
• Stigma is capitate & glandular
11
1212
13
• Starts in morning around 6 am and continues till 11 am
• Maximum flower opening – 11am to 5 pm
14
• Essentially a Self Pollinated crop was chasmogamy.
• Self pollination varies between 94 - 99%
• But 6-10% Natural Cross pollination have been reported depending on
• Temperature
• Insect population & activity at flowering time
• Planting design
• Plant population
• Wind velocity & direction
• Genotypic nature
15
16
• Bagging of young bud
• In this crop 6-10% cross pollination is observed.
17
• Includes
• Emasculation
• Artificial pollination
• Bagging
• Taging
• 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
18
19
CROSSING
• Take well opened flower.
• Gently push the back of the flower & get the pollens.
• Then put pollens on emasculated flower.
• Then bag it.
20
21
22
• Success rate – 33%
• Depends upon temperature and humidity
• Emasculation carried out before noon
• Pollinate the emasculeted flowers on the same day or following day.
VARIATION
23
IMPROVED VARIETIES• Rongai
• Highworth
• Koala
• Endurance
• HA-4
• Hebbal avare-1
• Hebbal US.67-31
• Hebbal avare-4
24
25