UNIVERSITY OF AGRICULTURAL SCIENCES, RAICHUR
COLLEGE OF AGRICULTURE, RAICHUR
GPB - 515 (1+1) Maintenance Breeding and Concepts of Variety Release and Seed Production
Mid-term Exam
Time: 2 hours
Max. Marks: 30
ID No: 9089
Q. I. Define / Answer briefly (10 x 1.5 = 15.00)
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Describe the favorable weather conditions for hybrid seed production in rice?
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What are technical criteria for protection of a variety?
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Mention the desirable traits of CMS lines in rice
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Mention the objectives of PPV&FRA, 2001
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How plant variety release is different from registration?
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Mention the benefits of GA3 application in hybrid rice seed production
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How seed of varietal blend is produced and maintained?
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Mention the desirable traits of R-lines in rice
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How the modern hybrid variety is produced and maintained?
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Discuss DUS guidelines established under UPOV system
Q. II. Differentiate the followings (5 x 1 = 5.00)
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Essentially derived variety (EDV) and Extant variety
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CVRC and SVRC
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Test cross nursery and Identification nursery
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Multi-location trial and Adaptive trial
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Genetic purity and varietal identity
Q. III. Discuss/Answer the following (2 x 2.5 = 5.00)
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How central system of variety release works? Discuss in detail
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Discuss the nucleus seed production of EGMS parental lines in rice
Q. IV. Match the followings with appropriate words (10 x 0.5 = 5.00)
Part A
a. De-notified variety
b. KHR-2
c. Complete & stable male sterility
d. OPV
e. Extant variety protection
f. Trees & Vines protection
g. Stable & strong restoration
h. Pure line
i. Hybrid rice
j. CMS source in rice
Part B
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Oryza sativa f. spontaneus
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18 years
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Hand pollination
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R-lines
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Wild Abortion
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15 years
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CMS line in rice
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Prof. Yuan Long Ping
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Heterozygous & homogeneous
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Homozygous & homogeneous
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Hybrid rice
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Heterozygous & heterogeneous
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Extant variety
Best of luck
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