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Field bean

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Floral biology and breeding techniques

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Field bean

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  2. 2. LABLAB • FLORAL BIOLOGY • SELFING • EMASCULATION • CROSSING BY MANJUNATH HARTI Jr M.Sc (agri) ID NO-PAK 9211 DEPT OF GPB 2
  3. 3. 3 • Scientific Name :Dolichos lablab (L). • Family : FABACEAE • Chromosome No. : 2n = 2x = 22
  4. 4. TAXONOMY • Botanical name : Dolichos lablab • Order :Fabales • Family :Fabaceae • Sub-family :Faboideae • Genus :Dolichos • Tribe :Phaseoleae • Sub-tribe :Faboideae • Species :Lablab 4
  5. 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 5
  6. 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 6
  7. 7. 7 • D. lablab • D. purpureus • D. albus • D. cultratus • D. bengalensis • D. lablab var hortensis • D. lablab var muschler • D. lablab var schweinf
  8. 8. 8 FLORAL BIOLOGY FLORAL MORPHOLOGY FLORAL ANTHESIS
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  10. 10. 10 • Infloresence is a stiff axillary raceme with many flowers. • Flowers 1-5 together form tubercles on rachis. 10
  11. 11. 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
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  13. 13. 13 • Starts in morning around 6 am and continues till 11 am • Maximum flower opening – 11am to 5 pm
  14. 14. 14 • Essentially a Self Pollinated crop was chasmogamy. • Self pollination varies between 94 - 99%
  15. 15. • 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. 16. 16 • Bagging of young bud • In this crop 6-10% cross pollination is observed.
  17. 17. 17 • Includes • Emasculation • Artificial pollination • Bagging • Taging
  18. 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 18
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  20. 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. 20
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  22. 22. 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.
  23. 23. VARIATION 23
  24. 24. IMPROVED VARIETIES • Rongai • Highworth • Koala • Endurance • HA-4 • Hebbal avare-1 • Hebbal US.67-31 • Hebbal avare-4 24
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