eprintid: 4328
rev_number: 11
eprint_status: archive
userid: 64
dir: disk0/00/00/43/28
datestamp: 2011-12-05 11:38:13
lastmod: 2011-12-05 11:39:08
status_changed: 2011-12-05 11:38:13
type: book_section
metadata_visibility: show
contact_email: Library-ICRISAT@cgiar.org
item_issues_count: 0
creators_name: Reddy, B V S
creators_name: Ashok Kumar, A
creators_name: Kaul, S L
icrisatcreators_name: Reddy, B V S
icrisatcreators_name: Ashok Kumar, A
affiliation: ICRISAT(Patancheru)
country: India
title: Alternative cytoplasmic male sterility systems in sorghum and their utilization
ispublished: pub
subjects: s1.4
full_text_status: public
abstract: In sorghum, Stephen and Holland (1954) discovered cytoplasmic male sterility
(CMS) designated as milo cytoplasm in the progenies of a cross between two
cultivars, milo and combine kafi r, with milo as the female and kafi r as the male.
Male-sterile plants to the extent of 25% were observed in the F2 generation of the
above cross when milo was used as female and not as male. The male-sterile
segregants from this cross produced male-sterile hybrids when crossed with the
kafi r parent and fully fertile hybrids when crossed with the milo parent. Thus, it was
recognized that kafi r could be used as a maintainer of this source of CMS. Since
the progeny received the cytoplasm from the female, it was hypothesized that the
milo parent had a male sterility-inducing cytoplasm and dominant genes for pollen
fertility, whereas the combine kafi r parent contained a normal (fertile) cytoplasm
but the recessive male-sterile genes. All progenies of the milo×combine kafi r cross
contained milo (sterility-inducing) cytoplasm, but those that also inherited the
homozygous recessive genes from the kafi r parent were male-sterile. The malesterile
plants in the milo×combine kafi r cross were used as females in repeated
backcrossing with kafi r as the male parent. At the end of seven backcrosses, the
entire genome of kafi r was transferred into the milo cytoplasm. This resulted in
two morphologically similar versions of the combine kafi r (CK 60) parent: a malesterile
combine kafi r (CK 60A) and a male-fertile combine kafi r (CK 60B). The
male-sterile lines are designated as A-lines and their maintainer lines as B-lines.
Subsequently, several sources of CMS systems (A1, A2, A3, A4, A5 and A6) (Table
13) were discovered.
date: 2008
date_type: published
publication: Sorghum improvement in the new millennium
publisher: International Crops Research Institute for the Semi-Arid Tropics, Patancheru 502 324, Andhra Pradesh, India
place_of_pub: Patancheru, Andhra Pradesh, India
pagerange: 132-144
pages: 340
refereed: TRUE
isbn: 978-92-9066-512-0
book_title: Sorghum improvement in the new millennium
related_url_url: http://scholar.google.com/scholar?as_q=%22Alternative+cytoplasmic+male+sterility+systems+in+sorghum+and+their+utilization%22&num=10&btnG=Search+Scholar&as_epq=&as_oq=&as_eq=&as_occt=title&as_sauthors=&as_publication=&as_ylo=&as_yhi=&as_sdt=1.&as_sdtp=on&a
related_url_type: author
citation:   Reddy, B V S and Ashok Kumar, A and Kaul, S L  (2008) Alternative cytoplasmic male sterility systems in sorghum and their utilization.   In:  Sorghum improvement in the new millennium.   International Crops Research Institute for the Semi-Arid Tropics, Patancheru 502 324, Andhra Pradesh, India, Patancheru, Andhra Pradesh, India, pp. 132-144.  ISBN 978-92-9066-512-0     
document_url: http://oar.icrisat.org/4328/1/Alternative_cytoplasmic_male_sterility_systems_in_sorghum_and_their_utilization.pdf