Learn about the comparison between inbreeding depression and hybrid vigour. 1. Increase in Homozygosity vs. Development of Heterozygosity: Due to inbreeding each line becomes increasingly homozygous, as a consequence the variation within a line decrease rapidly. After 7-8 generations of selfing, the lines becomes almost uniform (99% homozygosity) which are called inbred lines. Hybridization always […]
Inbreeding Depression and Hybrid Vigour | Plants
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Heterosis: Manifestation and Application | Plant Breeding
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In this article we will discuss about:- 1. Manifestation of Heterosis 2. Genetic Basis of Heterosis 3. Applications. Manifestation of Heterosis: Performance or expression of any character or trait is influenced by many genetic factors — some are positive (stimulating) and others are negative (decreasing). Expressivity of the genes or the degree of manifestation of […]
4 Main Steps of Hybrid Seed Production | Plant Breeding
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The following points highlight the four main steps of hybrid seed production. The steps are: 1. Choice and Development of Seed Parent (A-Line) 2. Choice and Development of Restorer or Male Parent (R-Line) 3. Maintenance and Multiplication of Parental Seeds 4. Production and Improvement of F1 Hybrids. Step # 1. Choice and Development of Seed […]
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