The UNO
declared 2009 as
“The Year of
Natural Fibers.”
Year Designated by UN as
2020 The United Nations (UN) is declaring2020 the
‘International Yearof Plant Health.’ Capping off the
‘Decade on Biodiversity,’ the UN continues to recognize
and promote healthy ecosystems as key to sustainable
development.
2016 International Year of Pulses
2015 International Year of Soils
2010 International Year of Biodiversity
2009 International Year of Natural Fibres
2008 International Year of the Potato
List of vegetable fibers
Vegetable fibersare generally based on arrangements of cellulose, often with lignin.
Fibres –Cotton and Jute
The UNO declared 2009 as “The Year of Natural Fibers.”
Origin: Central Africa
Distribution:
World: China, USA, India, Pakistan, Egypt.
India: Rajasthan, Maharashtra, M.P. Gujarat, A.P.
Karnataka and Tamil Nadu.
Progenitors: Gossypiumafricanum
G. raimondii
Gossypiumafricanum–reached India by traders
and travelers and differentiated into two species
G. herbaceumandG. arboreum
Global distribution of Gossypium (cotton) cultivation
Sr.NoBotanical Name Chromosome NoGenome Remarks
1G.herbaceum 2n=26 A1A1
Deshi or old world
cotton
2G.arboreum 2n=26 A2A2
Deshi or old world
cotton
3
G.hirsutum ( upland or
American cotton) 2n=52 A1A1D1D1
American or new
world cotton
4
G.barbadense
( Egyptian or Peruvian
cotton) 2n=52 A2A2D2D2
American or new
world cotton
SPECIES:
CottonbelongstogenusGossypium.Thegenushas35diploid
(ABCDEFGgenomes)and7tetraploidspeciesoutoftheseonlytwo
diploidandtwotetraploidspeciesarecategorizedascultivated.
Cultivated Species:
I. Asiatic cottons or old world cotton (Diploid
cotton –2n = 26)
G. arboreum–
G. herbaceum–
II. New world cotton (Tetraploidcottons –2n =
52)
G. hirsutum–American / upland cotton
G. barbadense–Egyption/ sea island cotton
G.hirsutumispredominantspecieswhich
contributesabout90%tothecurrentworld
production.
Cotton
species
Cotton
fiber type
Length Properties
Gossypium
hirsutum
Short-staple
(SS) cotton
fiber
up to 1.125
inches long
not as high-
quality as other
forms of this
textile fiber
Gossypium
barbadense
Extra-long-
staple
(ELS)
between
1.125 and
1.25 inches
long
consists of
longer cotton
fibers that
produce softer
and more
luxurious textiles
Cotton Plant Varieties
Breeding objectives
1.High yield (more bolls, bigger bolls and high
lint percentage)
Lint % = weight of fibre/ weight of cotton
Lint index = 100 seed weight X lint % / 100–lint %
Early maturity
Superior fibrequality
A.Fibrelength
Superior, long fibre-27mm or more
Long fibre -24.5 -26 mm
Superior, medium long -22 -24 mm
Medium long -20 –21.5 mm
Small fibre -19mm or less
B. Fibrestrength
C. Fibrefitness
Better plant type-–less spreading and dwarf plants are preferred
Resistance to diseases -Seedling rot , Fusariumwilt, Verticillium
wilt, Bacterial light
Resistance to insects -Cotton boll worms, Spotted worm, Jassidsand
thrips, White fly, Aphid
Resistance to abioticstresses.
Breeding Procedures
1. Introduction : Cambodia cotton in South
India, MCU-1
2. Selection : K1 cotton reselection from SRT -1
3. Hybridization and selection
a)Inter varietal :
MCU 5 -Multiple cross derivative
MCU 6 -Multiple cross derivative
MCU 9 -(MCU 5 x MCU 8)
MCU 11 -(MCU 5 x Egyptian hirsutum)
b)Interspecifichybridization:
Origin of New World CottonG. herbaceumVarafricanumlintedX G. rarimondiilintless
Old world cotton American cotton
Diploid (2n=2x=26) Diploid (2n=2x=26)
AA DD
F1 hybrid
Diploid 2n=2x=26
AD Sterile
Doubling of chromosomes
G. hirsutum
New world cotton Amphidiploid
2n = 4x = 52
AA DD
5. Mutation breeding
MCU 7-Xrayirradiated mutant of L 1143
MCU 10 -Gamma irradiated mutant of MCU 4
Indore –2
MCU –5
Rasmi
6. Population improvement followed in USA
The name Pima is generally applied to Extra long staple
cotton.
Recurrent selection : Pima S1 Pima S4 of G.barbadense
Synthetic variety : Deltapine15 developed at konyvllwer
USA.
Composite : Pima 17 of G.barbadense.
White jute (C.capsularis)Tossa jute (C.olitorius )
DistributionpatternofwildspeciesofCorchorusinAfrica,
Australia,SouthAmerica,CaribbeanIsland,andIndian
subcontinent
The primary center of origin and diversity of the wild
taxa of Corchorus appears to be Africa
Representative wild species of Corchorusincluding available Indian species
RepresentativewildspeciesofCorchorusincludingavailableIndianspecies(a)Corchorus
aestuans,(b)Corchorusdepressus,(c)Corchorusfascicularis,(d)Corchorus
pseudocapsularis,(e)Corchoruspseudo-olitorius,(f)Corchorustridens,(g)Corchorus
trilocularis,(h)Corchorusurticifolius,(i)Corchoruscunnighamii,(j)Corchorushirsutus,
(k)Corchorussedoides,(l)Corchoruswalcottii
Breeding objectives
1. Breeding for high yielding short duration jute
varieties.
Earlyvarietiesaregenerallylowyielderswhereas
latevarietiesarehighyielders.Sotocombinehigh
yieldwithearlinessisoneofthemainobjectives.
Yieldispositivelycorrelatedwithplantheight,basal
diameterofstem,fibre-stickratio.
Higherphotosyntheticcapacitywithincreased
laminalength,breadth,petiolelengthandleaf
angleat40
O
alsocontributetoyield.
2. Breeding for quality fibre
In jute quality is negatively, correlated
with yield. The quality characters are
a) Fibrelength.
b) Fibrestrength
c) Fibrecolour
d) Lustre
e) Percentage and quality of retting
3. Breeding for pest and disease resistant varieties
In pests, stem borer and aphids cause greater damage and
in diseases Macrophomenais major.
Though resistance sources are available in other related
species, the crossabilitybarrier prevents transfer.
4. Breeding varieties for high seed yield :
Sincejuteiscutforfibreat50%floweringstage,itis
essentialtoreservesomeplantsforproductionof
seeds.
Thefibreobtainedfromseedcropwillbepoorinquality.
Henceitisnecessarytobreedvarietiesspeciallyfor
highseedproductionwithoutloosingquality
characters.