Synthesis of stocks and phenotypic effects of dwarf and bantam sex-linked major genes in egg-type chickens
Autor(a) principal: | |
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Data de Publicação: | 1997 |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Brazilian Journal of Genetics |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84551997000300003 |
Resumo: | The present study describes the production of stocks segregating dwarf (dw), bantam (dwB) and normal (dw+) alleles, as well as the characters, shank length, adult body weight, age at sexual maturity and egg production. Heterozygous K dw+/k dwB sires were mated to normal (dw+) dams to produce stock D6.a, and mated to dwB females to produce stock D6.b. Stock D4.a came from mating F1 heterozygous dwB dw sires to dwarf Leghorns. In a third series of matings, 7/8 Sebright and 1/8 dw-Leghorn dwB dw sires were crossed to three groups of dams of different genotypes. The progeny of the normal (dw+), dwarf (dw), and bantam (dwB) dams were designated as stocks D4.b, D4.c and D4.d, respectively. The dw+ dams were White Leghorn strain cross females. The difference between the rate of laying of normal (69.7%) and their bantam sisters (68.6%) was not statistically significant when the average 32-week body weight of the dw+ sisters was 1,897 g. However, when the 32-week body weight of the normal daughters from the same sires and smaller dams was around 1,646 g, the difference between the rate of laying of the normal (78.1%) and their bantam sisters (75.9%) was significant (P < 0.05). The dwB gene may have a similar but smaller effect on the rate of egg laying than its dwarf allele. The difference between sexual maturity of normal and bantam daughters of either the largest or the smallest dams was not statistically significant, even though the smallest dwB pullets were in average 2.9 days older at first egg. The use of shank length combined with adult body weight allowed a precise discrimination between bantams and dwarfs |
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oai:scielo:S0100-84551997000300003 |
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Brazilian Journal of Genetics |
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Synthesis of stocks and phenotypic effects of dwarf and bantam sex-linked major genes in egg-type chickensThe present study describes the production of stocks segregating dwarf (dw), bantam (dwB) and normal (dw+) alleles, as well as the characters, shank length, adult body weight, age at sexual maturity and egg production. Heterozygous K dw+/k dwB sires were mated to normal (dw+) dams to produce stock D6.a, and mated to dwB females to produce stock D6.b. Stock D4.a came from mating F1 heterozygous dwB dw sires to dwarf Leghorns. In a third series of matings, 7/8 Sebright and 1/8 dw-Leghorn dwB dw sires were crossed to three groups of dams of different genotypes. The progeny of the normal (dw+), dwarf (dw), and bantam (dwB) dams were designated as stocks D4.b, D4.c and D4.d, respectively. The dw+ dams were White Leghorn strain cross females. The difference between the rate of laying of normal (69.7%) and their bantam sisters (68.6%) was not statistically significant when the average 32-week body weight of the dw+ sisters was 1,897 g. However, when the 32-week body weight of the normal daughters from the same sires and smaller dams was around 1,646 g, the difference between the rate of laying of the normal (78.1%) and their bantam sisters (75.9%) was significant (P < 0.05). The dwB gene may have a similar but smaller effect on the rate of egg laying than its dwarf allele. The difference between sexual maturity of normal and bantam daughters of either the largest or the smallest dams was not statistically significant, even though the smallest dwB pullets were in average 2.9 days older at first egg. The use of shank length combined with adult body weight allowed a precise discrimination between bantams and dwarfsSociedade Brasileira de Genética1997-09-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84551997000300003Brazilian Journal of Genetics v.20 n.3 1997reponame:Brazilian Journal of Geneticsinstname:Sociedade Brasileira de Genética (SBG)instacron:SBG10.1590/S0100-84551997000300003info:eu-repo/semantics/openAccessCustódio,Randolfo William Silvestreeng1998-10-06T00:00:00Zoai:scielo:S0100-84551997000300003Revistahttps://www.gmb.org.br/brazilian-journal-of-geneticsONGhttps://old.scielo.br/oai/scielo-oai.phpsede@sgb.org.br || sede@sgb.org.br0100-84550100-8455opendoar:1998-10-06T00:00Brazilian Journal of Genetics - Sociedade Brasileira de Genética (SBG)false |
dc.title.none.fl_str_mv |
Synthesis of stocks and phenotypic effects of dwarf and bantam sex-linked major genes in egg-type chickens |
title |
Synthesis of stocks and phenotypic effects of dwarf and bantam sex-linked major genes in egg-type chickens |
spellingShingle |
Synthesis of stocks and phenotypic effects of dwarf and bantam sex-linked major genes in egg-type chickens Custódio,Randolfo William Silvestre |
title_short |
Synthesis of stocks and phenotypic effects of dwarf and bantam sex-linked major genes in egg-type chickens |
title_full |
Synthesis of stocks and phenotypic effects of dwarf and bantam sex-linked major genes in egg-type chickens |
title_fullStr |
Synthesis of stocks and phenotypic effects of dwarf and bantam sex-linked major genes in egg-type chickens |
title_full_unstemmed |
Synthesis of stocks and phenotypic effects of dwarf and bantam sex-linked major genes in egg-type chickens |
title_sort |
Synthesis of stocks and phenotypic effects of dwarf and bantam sex-linked major genes in egg-type chickens |
author |
Custódio,Randolfo William Silvestre |
author_facet |
Custódio,Randolfo William Silvestre |
author_role |
author |
dc.contributor.author.fl_str_mv |
Custódio,Randolfo William Silvestre |
description |
The present study describes the production of stocks segregating dwarf (dw), bantam (dwB) and normal (dw+) alleles, as well as the characters, shank length, adult body weight, age at sexual maturity and egg production. Heterozygous K dw+/k dwB sires were mated to normal (dw+) dams to produce stock D6.a, and mated to dwB females to produce stock D6.b. Stock D4.a came from mating F1 heterozygous dwB dw sires to dwarf Leghorns. In a third series of matings, 7/8 Sebright and 1/8 dw-Leghorn dwB dw sires were crossed to three groups of dams of different genotypes. The progeny of the normal (dw+), dwarf (dw), and bantam (dwB) dams were designated as stocks D4.b, D4.c and D4.d, respectively. The dw+ dams were White Leghorn strain cross females. The difference between the rate of laying of normal (69.7%) and their bantam sisters (68.6%) was not statistically significant when the average 32-week body weight of the dw+ sisters was 1,897 g. However, when the 32-week body weight of the normal daughters from the same sires and smaller dams was around 1,646 g, the difference between the rate of laying of the normal (78.1%) and their bantam sisters (75.9%) was significant (P < 0.05). The dwB gene may have a similar but smaller effect on the rate of egg laying than its dwarf allele. The difference between sexual maturity of normal and bantam daughters of either the largest or the smallest dams was not statistically significant, even though the smallest dwB pullets were in average 2.9 days older at first egg. The use of shank length combined with adult body weight allowed a precise discrimination between bantams and dwarfs |
publishDate |
1997 |
dc.date.none.fl_str_mv |
1997-09-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84551997000300003 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84551997000300003 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/S0100-84551997000300003 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
Sociedade Brasileira de Genética |
publisher.none.fl_str_mv |
Sociedade Brasileira de Genética |
dc.source.none.fl_str_mv |
Brazilian Journal of Genetics v.20 n.3 1997 reponame:Brazilian Journal of Genetics instname:Sociedade Brasileira de Genética (SBG) instacron:SBG |
instname_str |
Sociedade Brasileira de Genética (SBG) |
instacron_str |
SBG |
institution |
SBG |
reponame_str |
Brazilian Journal of Genetics |
collection |
Brazilian Journal of Genetics |
repository.name.fl_str_mv |
Brazilian Journal of Genetics - Sociedade Brasileira de Genética (SBG) |
repository.mail.fl_str_mv |
sede@sgb.org.br || sede@sgb.org.br |
_version_ |
1754734879213355008 |