Category: Genetics and Plant Breeding Pointers
Genetics and Plant Breeding Pointers 35
By Agritests |
27 Jun, 2026
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Sex chromosomes were first discovered by – Mc Lung in 1902, in grass hoppers. Ø Sex linked gene passes from male to female then back to male; such an inheritance pattern is known as – Criss cross inheritance Ø Sex reversal term discovered by Crew. Ø Silk cotton is obtained from — Inner wall of the fruit. Ø Single gene controlling […]
Genetics and Plant Breeding Pointers 34
By Agritests |
27 Jun, 2026
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Who proposed the multiple factor hypothesis for the inheritance of quantitative characters – Nilson-Ehle Ø Genes having individually small but cumulative effect on a character, they govern quantitative character is known as Polygenes Ø The term polygenes was coined by Mather (1943) Ø The appearance of individuals in F2 with very higher or lower intensity of expression than their […]
Genetics and Plant Breeding pointers 33
By Agritests |
27 Jun, 2026
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Genetic purity of foundation seed is 99.5%. Ø Genetic purity of certified seed is 99%. Ø National Seeds Corporation was established in 1963. Ø High yielding varieties (HYV) programme was started in- 1966. Ø The Seeds Act was passed in December, 1966. Ø The Seeds Act was effective in October, 1969. Ø The National Seeds Programme (NSP) was launched in- 1977 Ø Potato Breeder Seed […]
Genetics and Plant Breeding pointers 32
By Agritests |
27 Jun, 2026
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Smart breeding approaches facilitate the development of crop varieties with improved tolerance to biotic stresses, such as pests, diseases, and weeds, reducing the need for chemical inputs and promoting ecological pest management practices. Ø Strengthening international collaboration and knowledge exchange networks accelerates the dissemination of smart breeding innovations, promotes technology transfer, and facilitates capacity building in developing […]
Genetics and Plant breeding pointers 31
By Agritests |
27 Jun, 2026
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Ø DUS test centre for medicinal and aromatic plants is located at DMPR anand. Ø Development of embryo from megaspore mother cell due to failure in reduction of chromosomes is called as Diplospory. Ø The group of crop varieties that are stabilized are homozygous, however composites are heterozygotes. Ø Prion is composed of protein. Ø […]
Genetics and Plant breeding Pointers 30
By Agritests |
27 Jun, 2026
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Ø QTL mapping facilitates the identification of epistatic interactions between loci, shedding light on the complex genetic networks underlying trait variation and providing insights into non-additive genetic effects that contribute to phenotypic diversity. Ø The integration of genomic information derived from QTL mapping with high-throughput phenotyping platforms enables breeders to conduct genome-wide association studies (GWAS) and genomic […]
Genetics and Plant breeding Pointers 29
By Agritests |
27 Jun, 2026
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Ø Implementing decentralized breeding networks and participatory plant breeding approaches empowers local communities to address their specific agricultural challenges and adapt breeding strategies to local conditions. Ø Enhancing crop nutritional quality through biofortification and targeted breeding efforts addresses micronutrient deficiencies and improves human health outcomes, particularly in vulnerable populations. Ø Smart breeding programs promote […]
Genetics and Plant Breeding Pointers 28
By Agritests |
27 Jun, 2026
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Selection of plants from a population is almost always based on their phenotype Ø Selection for qualitative traits begins in the first segregating generation, viz., F2 Ø East (1916) reported similarities between polygenic and oligogenic character Ø Variety of genes and genotypes found in a species – Genetic diversity Ø East (1916) confirmed that quantitative characters are governed by many genes by […]