Sadia Liaquat-1 (1).pptx plants microbiology

Plants

1. S adia L iaqat 2019-ag-6600 Dr . Farooq Ahmad M.Phil . Botany 2nd semester University of Agriculture Faisalabad

2. Genetic Diversity Of Plants And It’s Significance

3. CONTENTS Introduction Types of genetic diversity Factors influencing genetic diversity Significance of genetic diversity Conclusions

4. Introduction Genetic diversity is the amount of genetic variability present among individuals of a variety or a population within a species . Genetic diversity in plants Genetic diversity in plant species depends on the heritable variation present within and between populations. It occurs due to genetic variation in the nucleotide sequence of DNA, chromosome mutations, and recombination during sexual reproduction. The genetic diversity among plant populations in a given species allows the plants to adapt to various environmental conditions. Such diversity could therefore yield valuable traits that could overcome the food-security challenges. .

5. These are the following types of genetic diversity. Genetic Diversity within population Genetic Diversity b etween populations TYPES OF GENETIC DIVESITY

6. 1. Within Population Definition; Within-population diversity refers to the genetic variation among individual plants within a single population .

7. 2. Between Population Definition; Between-population diversity refers to the genetic variation between different populations of the same species. This can be caused by geographical isolation, different environmental pressures, or variations in breeding patterns.

8. Within-Plants diversity

9. Between-Plants diversity

10. These are the following influencing factors. In sexual reproduction gene combination of both the parents occur which produce genetic variations in the offspring. . Mutations are changes in the DNA of an organism . These changes can create new alleles, which can increase genetic diversity. Factors Influencing Genetic Diversity 1 ) Sexual reproduction : 2 ) Mutations

11. 3) Gene Flow Gene flow is the movement of genes between populations. This can happen through pollen or seed dispersal, or through the movement of animals that carry pollen or seeds.

12. Environmental factors, such as climate and soil type, can influence which genes are most beneficial for a plant's survival. Over time, plants can adapt to their environment by evolving new genetic traits. 4 ) Environmental factors :

13. Genetic diversity is crucial for a healthy population as it maintains different genes that could lead to resistance to pests, diseases, or other stress conditions. It also enables plants to adapt to various biotic and abiotic stresses . Significance Of Genetic Diversity

14. Significance Of Genetic Diversity 1 2