PPT-POLYPLOIDY Dr.H.B.Mahesha

Yuvarajas College University of Mysore Mysore 11 September 2020 wwwhbmaheshweeblycom 1 Mitotic and meiotic divisions are highly precise as a result of which the chromosome number of different species are highly stable But a low frequency of irregularities do occur These irregularities in chromosome number some type have contributed to crop evolution and all the types are of much use in plant breeding. *Corresponding author: Dr David Wetherell, Department of Surgery, University of Melbourne, Urology Unit, Austin Hospital, Room 8244, Level 8, Harold-Stokes Building, Austin Hospital, 145 Studley Road, Made famous by S. Ohno, who suggested WGD can be a route to. . evolutionary innovation (focusing on . neofunctionalization. ). Ohno proposed in the 1970s that vertebrate lineage underwent two WGDs . *Corresponding author: Dr David Wetherell, Department of Surgery, University of Melbourne, Urology Unit, Austin Hospital, Room 8244, Level 8, Harold-Stokes Building, Austin Hospital, 145 Studley Road, Selective Breeding. Student Learning Objectives. One/Many Idea:. Define selective breeding. Describe Inbreeding. Describe Hybridisation. Describe Polyploidy . Which of these is/are not genetically manipulated?. Dept. of Botany. Vidnyan. . Mahavidyalaya. , . Sangola. Sem. VI, Paper XV. METHODS OF PLANT BREEDING. . 1. . PLANT INTRODUCTION. It is a process of introducing new plants with desirable characters from their area of origin to a new area is called plant introduction. Taking a genotype or a group of genotypes in to a new place or environment where they were not grown previously. This process is very fast and easy method of breeding.. Yuvaraja’s College. University of Mysore, Mysore. 11 September 2020. 1. www.hbmahesh.weebly.com. Chromosomes . have definite . structure and organization, which is normally constant from one cell division to next. . Department of Sericulture. Yuvaraja’s. College. University of Mysore, India. 23 September 2020. DNA REPLICATION. 1. www.hbmahesh.weebly.com. DNA replication . The process of making an identical copy of a section of duplex (double-stranded) DNA, using existing DNA as a template for the synthesis of new DNA strands. . Associate Professor. Department of Sericulture. Yuvaraja’s. College, . University of Mysore, Mysore, India. 29 August 2019. 1. www.hbmahesh.weebly.com. The name . Coleoptera. , derived from the Greek words . Department of Sericulture. Yuvaraja’s. College, . University of Mysore, Mysuru, India. SILKWORM PESTS. 25 September 2020. 1. www.hbmahesh.weebly.com. Pest: . A general term for organisms (Insects . Professor and Head. Department of Sericulture. Yuvaraja’s . College . University of Mysore, India.. MUTATION. Friday, 11 September 2020. www.hbmahesh.weebly.com. 1. Friday, 11 September 2020. www.hbmahesh.weebly.com. Joshua A. Udall and Jonathan F. . Wendel. Summary. Introduction. Polyploid Terminology and Modes of Formation. Inferring the Genomic Composition of Polyploids. Polyploidy is Cyclical and is Followed by Gene Loss and Diversification. Associate Professor and Head. Department of Sericulture. Yuvaraja’s College, . University of Mysore, Mysore, India. 11-Sep-20. 1. www.hbmahesh.weebly.com. CHROMOSOMES. The chromosomes are nuclear components of special organization, individuality and function. They are capable of self reproduction and play a vital role in heredity, mutation and evolution.. An example of a Allopolyploid is a liger. It’s a combination of a lion and tiger and is usually sterile (cannot reproduce).. When two polyploidy organisms mate, they create a new hybrid polyploidy organism that differs from either parent. The hybrid is usually sterile because the haploid set of chromosomes from this species cannot pair during meiosis with the haploid set of another species.. Associate Professor and Head. Department of Sericulture. Yuvaraja’s. College. University of Mysore, Mysuru, India. 10 September 2020. 1. www.hbmahesh.weebly.com. A group of complex compounds found in all living cells and viruses, composed of .