plant breeding and genetics Mcqs
1. In lucern, toxic substance is found in_____________________?
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A. All the above

B. Coumarin

C. Saponin

D. Neurotoxin

2. The smell in onion bulb is due to________________?
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A. Sulphur compounds

B. Bad odour of soil

C. Much sugar

D. Freshy leaves

3. Convergent improvement was proposed by________________?
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A. Hays (1919)

B. Richy (1920)

C. East (1920)

D. Jones (1920)

4. The first artificial hybridization in fruit crops was done by____________________?
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A. Knight

B. Morgan

C. Muller

D. Fischer

5. The most effective method for the transfer of oligogenic characters________________?
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A. Disruptive

B. Bulk

C. Backcross

D. Pedigree

6. Heterobeltiosis is estimated over the___________________?
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A. Popular variety

B. Mid parent

C. Standard parent

D. Better parent
7. The value of regression and correlation is the same when the correlation between two variables is________________?
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A. Negative

B. Imperfect

C. Positive

D. Perfect
8. Mating system in which each female gamete () with every male gamete is known as____________________?
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A. None of the above

B. Genetic disassortative mating

C. Random mating

D. Genetic assortative mating

9. Dominance hypothesis of heterosis was first proposed by__________________?
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A. Bruce (1910)

B. Shull (1914)

C. Davenport (1908)

D. Davis (1927)

10. The variety of genes and genotypes found in a particular crop special are_____________________?
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A. Gene sanctuaries

B. Genetic erosion

C. Field gene banks

D. Genetic diversity
11. Cytoplasmic genetic male sterility was first discovered by___________________?
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A. Jones and Davies (1944)

B. Nilson (1900)

C. Bruce and Keeble (1908)

D. Devaries and Correns (1900)

12. A place or area where maximum variability of crop plants is observed__________________?
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A. Micro centers

B. Gene sanctuaries

C. Centers of diversity

D. Genetic diversity

13. Pure line theory was developed by_______________?
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A. Thoday (1960)

B. Johannsen (1903)

C. Mather (1951)

D. Allard (1957)

14. Anthesis starts in wheat at__________________?
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A. 7.00 am

B. 5.20 pm

C. 10.00 am

D. 1.15 pm
15. Rice flowers have___________________?
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A. Eight stamens

B. Six stamens

C. None of the above

D. Four stamens

16. Concept of biparental mating was developed by__________________?
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A. Comstock and Robinson (1948)

B. Hayman (1958)

C. Jinks and Jones (1958)

D. Perkins (1968)

17. Conservation of germplasm under natural condion is called_________________?
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A. In-situ conservation

B. Obsolute cultivars

C. Ex-situ conservation

D. Gene bank

18. Cuscuta is an object ional weed of_____________________?
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A. Sorghum

B. Luceru

C. Berseem

D. Cowpeas

19. Citification is not required for_____________________?
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A. Nucleus seed

B. Certified seed

C. Foundation seed

D. Breeder seed
20. Mating between distantly related individuals is known as________________?
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A. All the above

B. Out breeding

C. Inbreeding

D. Amphimixis

21. Self incompatibility which is controlled by two genes is found in___________________?
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A. Solanaceae

B. None of the above

C. Gramineae

D. Cruciferae

22. Soybean contains___________________?
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A. Typsin inhibitor

B. Goiterogens

C. Both A & B

D. Neither

23. An individual lacking only one chromosome from the diploid set is referred as_________________?
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A. Nullisomic

B. Tetrasomic

C. Trisomic

D. Monosomic
24. In pulses, limiting amino acids include__________________?
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A. Threamine

B. Lysine

C. Methionine

D. Tryptophan
25. Discriminant function of plant selection was suggested by____________________?
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A. Kempt Horne (1957)

B. Griffing (1956)

C. Yates (1947)

D. Smith (1936)
26. In barley, resistance to cereal leaf beetle is associated with_________________?
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A. High aspartic acid

B. High silica content

C. Waxiness of leaves

D. High benzol alcohol

27. Blackeselee reported the first case of monoploid in__________________?
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A. Oat

B. Brassica

C. Rye

D. Datura
28. In half diallel, total crosses among parents are equal to___________________?
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A. P (P-1)/2

B. P (P-1)

C. P (P+1)/2

D. P2

29. Estimation of correlation form error variances and covariances is________________?
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A. Genotypic correlation

B. Simple correlation

C. Phenotypic correlation

D. Environmental correlation

30. Amphimixis refers to_______________________?
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A. Sexual reproduction

B. None of the above

C. Apomixes

D. Asexual reproduction

31. Protoandry is found in____________________?
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A. Maize

B. Barley

C. Wheat

D. Sorghum

32. Specific combining ability is primarily a function of___________________?
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A. Dominance x dominance epistasis

B. Additive x dominance epistasis

C. All the above

D. Dominance variance

33. RELPs, RAPD are helpful in___________________?
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A. Identify new gene

B. All the above

C. Gene mapping

D. Gene sequencing

34. The term recurrent selection was coined by_________________?
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A. Hull (1945)

B. Garber (1955)

C. Hull (1950)

D. Hays (1919)

35. Germplasm gene banks for different crop plants in world are about_____________________?
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A. 980

B. 1200

C. 1080

D. 1100

36. The food in onion is stored in_________________?
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A. leaves

B. Scale leaves

C. Stem

D. Root

37. Anthesis starts in Allium cepa at___________________?
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A. 5.00 pm

B. 3.00 pm

C. 7.00 am

D. 10.00 am

38. Male sterility in flowering plants was first reported is__________________?
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A. Bateman (1952)

B. Stout (1917)

C. Braw baker (1958)

D. Koelreuter (1763)
39. Genetic correlation between two variables may be due to___________________?
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A. Dominance

B. Selection differential

C. Peliotropy

D. Gene interaction

40. Genetic male sterility is controlled by_________________?
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A. All the above

B. nuclear genes

C. Non alleleic genes

D. Allelic genes

41. Tea, coffee and mango seeds can not be converted in seed banks because they drastic loss in viability with decrease in moisture content below.___________________?
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A. 18%

B. 12%

C. 15%

D. 20%

42. The concept of multi line varieties was developed by_________________?
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A. Falconer (1960)

B. Johannsen (1903)

C. Goulden (1939)

D. Jensen (1952)
43. Parthenocarpy is the production of____________________?
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A. Fruit without pollination

B. Only seed and no fruit

C. fruit without fertilization

D. Seed without fertilization

44. Law of parallele variation was given by___________________?
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A. Vavilov

B. Wilkins

C. None of the above

D. Jacob

45. Concept of ideotype___________________?
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A. Model plant type

B. Good plant model

C. Ideal plant type

D. All the above
46. Cytoplasmic sterility is govemed by________________________?
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A. None of the above

B. Plasma genes

C. Nuclear genes

D. Monoalleleic genes

47. Which one is C3 crop plant__________________?
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A. all the above

B. Tomato

C. Onion

D. Gram

48. Drought resistance is associated with___________________?
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A. Physiological factors

B. all the above

C. Biochemical factors

D. Morphological factors

49. Low magnitude of genotype x environmental interaction indicates__________________?
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A. Stability

B. Low buffering capacity

C. Adaptability

D. High buffering capacity
50. Ratio of additive variance to phenotypic variance is called___________________?
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A. Heritability (broad sense)

B. Genetic gain

C. Heritability (narrow sense)

D. Co-heritability