Evolutionary Studies,Diploid Wild Species,Andigena,Progenitor,Genome Analysis,Meiosis,Dihaploids,Pachytene Chromosome

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Production and Uses of Haploids Production and Uses of Haploids Introduction Production of Haploids Anther and Microspore Culture Ovule Culture Chromosome Elimination Somatic Reduction and Chromosome Elimination Mechanism of Chromosome Elimination Detection or Identification of Haploids Use of Haploids in Plant Breeding Programmes Use of Haploids in Species with Disomic Inheritance Hybrid Sorting in Haploid Breeding Some high Yielding Crop Varieties through Hybrid Sorting Using Anther Culture

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Evolutionary Studies
A comparison of dihaploids in potato with diploid wild species proved useful in deriving conclusions about the origin of cultivated potato. Since, production of 2n gametes in common both in dihaploids as well as in diploid species, it is suggested that Andigena, the progenitor of Tuberosum must have originated many times from different but related 2x populations in different locations through sexual polyploidization. Haploids in potato have also been used for crosses with diploid species to conduct genome analysis. The meiosis in F1 hybrids and further generations suggested that wild species differ from cultivated potato for a small number of genes.

Potato dihaploids were also used for a study of relationship between potato and tomato. A study of pachytene chromosome in potato dihaploids and tomato (diplods, 2n=24) suggested close evolutionary relationship between potato and tomato. Recently potato dihaploids were used for preparing RFLP (restriction fragment length polymorphisms) maps in potato and for comparison of RELP maps in potato and tomato. The results indicated a high degree of conservation of DNA sequences.

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Comparison of Pedigree and Bulk Methods of Conventional Plant Breeding Production of Spontaneously Doubled Haploids for Breeding Use of Haploids in Species with Polysomic Inheritance Analytical Breeding in Potato Two Breeding Schemes Using 2n Gametes in Potato Analytical Synthetic Breeding for Potato Limitations to Haploid Breeding Other Uses of Haploids Mutation Research Gametoclonal Variation Cytogenetics Research Evolutionary Studies Genetic Studies