Download SGBAU BSc 2019 Summer 2nd Sem Seed Technology Plant Breeding Methods For Crop Improvement n Seed Production Question Paper

Download SGBAU (Sant Gadge Baba Amravati university) BSc 2019 Summer (Bachelor of Science) 2nd Sem Seed Technology Plant Breeding Methods For Crop Improvement n Seed Production Previous Question Paper

AW?1665
B.Sc. (Part?I) Semester?Il Examination
SEED TECHNOLOGY (V0c.)
(Plant Breeding Methods for Cr0p Improvement and Seed Production)
Time : Three Hours] [Maximum Marks : 80
Note :? (1) There are seven questions in all.
(2) Question N0. 1 is compulsory and carries 8 marks.
(3) Question Nos. 2 to 7 carry equal marks.
(4) Draw well labelled diagrams wherever necessary
1. (A) Fill in the blanks :
(i) When two alleles for a trait received from the parents are diffcrem the organism
is said to bc .? A- for this trait. V2
(ii) Headquarter of NBPGR is ,
(iii) _ selection has been commonly uscd breeding scheme applied to gcneticallv
variable and homozygous population of self pollinated crops. E
_. ?/'2
\
u\
(iv) Extra chromosomes arc present or missing in the cell ; such condition is known
as '
i!. ?12
(B) Choose the correct alternative (MCQ) :
(v) Individuals which contain two different chromosomes in triplicate instead of two
Limes (2N + 1 .~ 1) are called as __ _ . '/2
(a) Double trisomics (bi) Double tetrasomic
(0) Double pcntasomic (d) Diploids
(vi) - v__ originates spontaneously at a low frequency. V2
(21) Diploid (b) Aneuploid
(c) Both (d) None
(vii) When cndosporc deVCIOpment is . _ , the condition is generally known as
cndospcrm abortion. V:
(21) Maximum (b) Neutral
(c) Poor (d) None
(viii)Relativc humidity affects seed _._-_ content because seeds are
hygroscopic. {/2
(a) Heat (b) Air
(c) Soil (d) Moisture
?30?152
9)
9 1 (Could)

(C) Answer in one senienw :
(ix) Which factors reduce The quality 01? the seed '1? l
(x) Dc?nc epistaS's. 1
(xi) Which rice is a gamma my induced scmidwarf mutant variety resistance to
lodging ?7 1
(xii)'l?he ratio of d.h}'hrid cmss is 1
2. Comment on :
(a) Gene intrraclion. 4
(h) Acclinmlizalion. 4
(c) Law of segregation ? 4
OR
(d) Quarantine. 4
(0) Plant introduction agcncics m India. 4
(1?) Law 01" independent awonmcit. 4
3. Give detail account of arti?cial :tnmtions and physical and chemical mu:alion. 12
OR
Comment on :
(a) Mass selection. 6
(b) Hybridization procedmc in grcss; pollinalcd crops, 6
4. Comment on :
(a) Classi?cajon of l?olyploiiy 4
(b) Causes of disease l?CSiSI?dI?L?C. 4
(c) Allopolyploidy. 4
()R
(d) Application of breeding far ci-(mc rcsisiancc. 4
(c) Amhcr culture. 4
(1) I'tffecls 0f uneuplnids. 4
5. Comment on :
(a) Pollen viability. 4
(b) Genmic malc sicrility. 4
(c) Diffcrchc between sccd end grain. 4
0R
YBC 4521?)
4 (Could)

(d) Genetic purity of varicLics. ?4
(c) Factors at?t?cming seed set. 4
(t) L?ses of 5011" incompatibility. 4
6. Comment on :
(a) Pollination for hybrid seed production. 6
(b) Seed village concept. 6
0R
Give detail account of factors affecting the choice of area of seed production
(any three). 12
7. Comment on :
(a) Selection of land for seed production. 4
(b) Harvcsting and threshing of seeds. 4
(c) Sccd plot techniquc of potato multiplication. 4
OR
(d) Indian seed industries. 4
(6) Special agronomic management. 4
(0 Roughing in wheat. 4
YBC 452:0 ?a 125