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Self incompatibility in plants
This document discusses self-incompatibility in plants. It describes self-incompatibility as the inability of a plant with normal pollen and ovules to set seeds due to a physiological barrier preventing fertilization. There are two main types of self-incompatibility: sporophytic self-incompatibility (SSI) and gametophytic self-incompatibility (GSI). GSI is controlled by the genetic constitution of the gametes, with pollen grains unable to germinate on stigmas containing similar alleles. GSI occurs commonly in potatoes, tomatoes, cabbage, and clovers. The document also lists some methods for eliminating self-incompatibility, such as doubling plant chromosomes, identifying self-compatible mutants,
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Self incompatibility in plants
- 2. Name: Aman ullah Sr no : 08 7th-PBG
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- 4. It is thefailure of plant with normal pollens and ovules to set seeds due to some physiological hindrance due to which fertilization may not occur..
- 5. Reasons.... Three Reasons;. Pollen grains may not germinate on stigma,, If germination occur on stigma ,pollen tube may be large,, Pollen tube goes slow to the egg or not go...
- 9. 2-Types Sporophytic Self-Incompatibility(SSI) Gametophytic Self-Incompatibility (GSI)
- 12. 2) Gametophytic Self-Incompatibility(GSI) This type of self incompatibility is controlled by genetic constitution of gametes. Pollen grains are unable to germinate on stigma with similar allele as that of pollen Mostly occur in nature . It occurs nearly in potatoes, Tomatoes Cabbage Clovers
- 14. GAMETOPHYTIC (GSI) Stigmais smooth and wet outcome of the interaction between the pollen tube and the style is determined by the genotype of the pollen (gamete) S-locus products are synthesized after completion of meiosis growth of the pollen tube arrests in the style SPOROPHYTIC (SSI) Stigma is papilate (hairy) and dry outcome of the interaction between the pollen tube and the style is determined by the genotype of the sporophyte (diploid tissue) S-locus products are synthesized before completion of meiosis growth of the pollen tube arrests at the surface of the stigma
- 15. Elimination of SI By doubling the chromosomes of the species as S1 doubled S1S1 S1S2 S1S1S2S2 Identification of self compatible mutant plants from a population of plants developed by same seeds’’’ Incorporation of self compatible genes of relative species or varieties of same species by back cross method’’’
- 16. Transfer of maturepollen on immature stigma for 2 to 3 days then we get compatible plants,, 2) End of season: High Temperature ; At 60 ° c expose female part Co2 concentration: near the flower increases it
- 17. High humidity: increaseit Salt spray: In brasica ,cabbage Nacl = 5 to 10 solution e.g in cabbage, brasica