Self pollination & Cross pollination

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SUMMARY

Self-pollination preserves the parental characteristics of plant species indefinitely, making it essential for maintaining pure lines in hybridization experiments. While meiosis occurs in micro and mega spore mother cells, leading to crossing over and potential variation, self-pollination primarily reduces genetic variation. This method is effective when breeding homozygous plants, as it allows for the preservation of specific traits through continuous inbreeding. Thus, self-pollination is a strategic approach for researchers focusing on limited traits in plant breeding.

PREREQUISITES
  • Understanding of plant genetics and breeding techniques
  • Knowledge of meiosis and its role in genetic variation
  • Familiarity with homozygosity and its implications in plant traits
  • Basic concepts of hybridization in botany
NEXT STEPS
  • Research the mechanisms of meiosis and crossing over in detail
  • Study the principles of homozygosity and its applications in plant breeding
  • Explore hybridization techniques and their impact on genetic diversity
  • Learn about the advantages and disadvantages of self-pollination versus cross-pollination
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Botanists, plant breeders, geneticists, and agricultural scientists interested in plant genetics and breeding strategies.

chound
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My book says self pollination maintains the parental characters or purity of the race indefinitely and is used to maintain pure lines for hybridization experiments.

How can that be true. Coz, meiosis takes place in micro & mega spore mother cells. So there is crossing over which will lead to variation right?
 
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Self-pollination reduces variation, but does not entirely eliminate it (due to crossing over and segregation of chromosomes during meiosis, as you have indicated), unless the parent is already homozygous for a trait. If one is only interested in studying limited traits, then it's possible to breed plants that are homozygous and then preserve those homozygous traits through continual inbreeding (self-pollination).
 

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