Genetics And Plant Breeding - Study Mode
[#266] Genetic assortative mating is a useful in developing
Correct Answer
(A) Inbreads
Explanation
Solution: Genetic assortative mating is useful in developing Inbreds. Assortative mating, in human genetics, is a form of non-random mating in which pair bonds are established based on phenotype. The closest type of genetic assortative mating is selfing. It results in homozygosity and fixation of types, therefore, is useful to develop homozygous lines and development of inbred lines for hybrid or synthetic cultivars.
[#267] Identify the phenotypic ratio of complementary gene action.
Correct Answer
(A) 9 : 7
Explanation
Solution: The phenotypic ratio of complementary gene action is 9 : 7. Any hybrid cross of complementary genes gives a phenotypic ratio of 9 : 7. A phenotypic ratio is a quantitative relation between phenotypes showing the number of times the frequency of one phenotype correlates with another. Complementary gene action is when two different genes work together to contribute to one single trait.
[#268] The concept of crop indeotype was developed by
Correct Answer
(D) Donald (1968)
Explanation
Solution: The concept of crop ideotype was developed by Donald (1968). An ideotype is a specimen identified as belonging to a specific taxon by the author of that taxon but collected from somewhere other than the type locality. The concept of ideotype in plant breeding was introduced by Donald in 1968 to describe the idealized appearance of a plant variety. It means a form denoting an idea'. According to Donald, an ideotype is a biological model which is expected to perform or behave in a particular manner within a defined environment.
[#269] NBPGR, New Delhi located in
Correct Answer
(D) 1076
[#270] Somatic Hybridization is achieved through
Correct Answer
(C) Protoplast fusion
Explanation
Solution: Somatic Hybridization is achieved through Protoplast fusion. Somatic fusion, also called protoplast fusion, is a type of genetic modification in plants by which two distinct species of plants are fused to form a new hybrid plant with the characteristics of both, a somatic hybrid. Somatic hybridization and cybridization have great potential for plant improvement. Somatic hybridization through protoplast fusion provides the ability to combine parent genes in higher plants to overcome sexual incompatibility among plant species or genera.