DEVELOPMENT OF CLCUV TOLERANT UPLAND CULTIVARS THROUGH INTROGRESSIO

Yıl 2024, Cilt: 4 Sayı: 2, 44 - 49, 31.12.2024

Bhatti Hayat Khezir Khezir , Farzana Ashra Hafiz Muhammad Imran Naveed Afza

Öz

Cotton Leaf Curl Virus (CLCuV) is a major threat to global cotton production, causing
significant yield losses, particularly in Pakistan. Upland cotton (Gossypium hirsutum)
lacks natural resistance to CLCuV, and the only viable solution is the introgression of
resistance from wild species, such as Gossypium arboreum and Gossypium
anomalum, which have shown resistance or immunity to the virus. In this study,
interspecific hybridization techniques were employed to transfer CLCuV resistance
from these diploid species into tetraploid G. hirsutum. Hybridization, polyploidy
induction using colchicine, and backcrossing were applied to develop virus-resistant
cotton varieties. The developed hybrids were screened for CLCuV resistance in
greenhouse and field conditions. Several hybrid combinations exhibited varying
degrees of resistance, with the highest recorded resistance of 33.0% in a multispecies
hybrid
combination.
Additionally,
plants
with
good
fiber
quality
and
high
seed

cotton
yield
were
identified.
Virus-resistant
plants,
including
those
with
extra-long
fiber

length,
were
evaluated
for
their
potential
in
breeding
programs.
The
CIM-608
variety,

approved

in 2013, and the Cyto-124 variety, approved in 2016, demonstrate
promising characteristics such as high seed cotton yield, good fiber quality, and
resistance to pests, making them valuable for enhancing cotton production and food
security. These results highlight the success of introgressing CLCuV resistance into
upland cotton and provide a foundation for future breeding programs aimed at
improving cotton's resistance to viral diseases and enhancing its economic traits

Anahtar Kelimeler

Cotton , Cotton Leaf Curl Virus (CLCuV) , Hybridization , polyploidy , gossypium spp

DEVELOPMENT OF CLCUV TOLERANT UPLAND CULTIVARS THROUGH INTROGRESSION

Öz

Cotton Leaf Curl Virus (CLCuV) is a major threat to global cotton production, causing
significant yield losses, particularly in Pakistan. Upland cotton (Gossypium hirsutum)
lacks natural resistance to CLCuV, and the only viable solution is the introgression of
resistance from wild species, such as Gossypium arboreum and Gossypium
anomalum, which have shown resistance or immunity to the virus. In this study,
interspecific hybridization techniques were employed to transfer CLCuV resistance
from these diploid species into tetraploid G. hirsutum. Hybridization, polyploidy
induction using colchicine, and backcrossing were applied to develop virus-resistant
cotton varieties. The developed hybrids were screened for CLCuV resistance in
greenhouse and field conditions. Several hybrid combinations exhibited varying
degrees of resistance, with the highest recorded resistance of 33.0% in a multispecies
hybrid
combination.
Additionally,
plants
with
good
fiber
quality
and
high
seed

cotton
yield
were
identified.
Virus-resistant
plants,
including
those
with
extra-long
fiber

length,
were
evaluated
for
their
potential
in
breeding
programs.
The
CIM-608
variety,

approved

in 2013, and the Cyto-124 variety, approved in 2016, demonstrate
promising characteristics such as high seed cotton yield, good fiber quality, and
resistance to pests, making them valuable for enhancing cotton production and food
security. These results highlight the success of introgressing CLCuV resistance into
upland cotton and provide a foundation for future breeding programs aimed at
improving cotton's resistance to viral diseases and enhancing its economic traits

Anahtar Kelimeler

Cotton , Cotton Leaf Curl Virus (CLCuV) , Hybridization , polyploidy , gossypium spp

Etik Beyan

yok

Destekleyen Kurum

yok

Teşekkür

yok

Kaynakça

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