Hot pepper (Capsicum chinense, Jacq.) inheritance of reaction to powdery mildew
Autor(a) principal: | |
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Data de Publicação: | 2006 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Scientia Agrícola (Online) |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162006000500008 |
Resumo: | The pepper species C. chinense has been considered one of the most important resistance sources to powdery mildew Capsicum spp. However, the inheritance in this species was unknown. The purpose of this work was to study its reaction inheritance. Two powdery mildew resistant parents, 'Pimenta Cheiro' 1 and PI 152225 and two moderately susceptible ones, 'Pimenta Doce' IH-1761 and 'Pimenta Índio', were used to obtain three F1 and their respective F2 generations: 'Pimenta Doce' IH-1761 <FONT FACE=Symbol>´</FONT> 'Pimenta Cheiro' 1, 'Pimenta Índio' <FONT FACE=Symbol>´</FONT> PI 152225 and 'Pimenta Doce' IH-1761 <FONT FACE=Symbol>´</FONT> PI 152225. The powdery mildew epidemy was natural using inoculum from a highly-sporulating susceptible pepper host. Powdery mildew host reaction evaluations were carried out during the fruiting stage using a rating system based on disease severity scales varying from 1 (resistant) to 5 (highly susceptible). The experimental design was completely randomized. The following genetic parameters were estimated: gene action, heritability coefficient and expected selection gain in the F3 generation. The transgressive segregation in F2 indicated oligogenic inheritance. Results show the presence of additive, dominant, and epistatic gene action. The dominant and epistatic effects detected in crosses presented negative values, tending towards susceptibility. The heritability and selection gain estimates were moderate, with values of 35.5% and 1.7% for 'Pimenta Doce' IH 1761 <FONT FACE=Symbol>´</FONT> 'Pimenta Cheiro' 1, from 50.4% to 3.5% for 'Pimenta Índio' <FONT FACE=Symbol>´</FONT> PI 152225, and 49% and 2.7% for the 'Pimenta Doce' IH 1761 <FONT FACE=Symbol>´</FONT> PI 152225 crosses, respectively. These gene action results are favorable for breeding programs and exploration of hybrids. |
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Hot pepper (Capsicum chinense, Jacq.) inheritance of reaction to powdery mildewLeveillula taurica (LEV.) Arn.Capsicum chinensegenetic resistancegene actionThe pepper species C. chinense has been considered one of the most important resistance sources to powdery mildew Capsicum spp. However, the inheritance in this species was unknown. The purpose of this work was to study its reaction inheritance. Two powdery mildew resistant parents, 'Pimenta Cheiro' 1 and PI 152225 and two moderately susceptible ones, 'Pimenta Doce' IH-1761 and 'Pimenta Índio', were used to obtain three F1 and their respective F2 generations: 'Pimenta Doce' IH-1761 <FONT FACE=Symbol>´</FONT> 'Pimenta Cheiro' 1, 'Pimenta Índio' <FONT FACE=Symbol>´</FONT> PI 152225 and 'Pimenta Doce' IH-1761 <FONT FACE=Symbol>´</FONT> PI 152225. The powdery mildew epidemy was natural using inoculum from a highly-sporulating susceptible pepper host. Powdery mildew host reaction evaluations were carried out during the fruiting stage using a rating system based on disease severity scales varying from 1 (resistant) to 5 (highly susceptible). The experimental design was completely randomized. The following genetic parameters were estimated: gene action, heritability coefficient and expected selection gain in the F3 generation. The transgressive segregation in F2 indicated oligogenic inheritance. Results show the presence of additive, dominant, and epistatic gene action. The dominant and epistatic effects detected in crosses presented negative values, tending towards susceptibility. The heritability and selection gain estimates were moderate, with values of 35.5% and 1.7% for 'Pimenta Doce' IH 1761 <FONT FACE=Symbol>´</FONT> 'Pimenta Cheiro' 1, from 50.4% to 3.5% for 'Pimenta Índio' <FONT FACE=Symbol>´</FONT> PI 152225, and 49% and 2.7% for the 'Pimenta Doce' IH 1761 <FONT FACE=Symbol>´</FONT> PI 152225 crosses, respectively. These gene action results are favorable for breeding programs and exploration of hybrids.Escola Superior de Agricultura "Luiz de Queiroz"2006-10-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162006000500008Scientia Agricola v.63 n.5 2006reponame:Scientia Agrícola (Online)instname:Universidade de São Paulo (USP)instacron:USP10.1590/S0103-90162006000500008info:eu-repo/semantics/openAccessBlat,Sally FerreiraCosta,Cyro Paulino daVencovsky,RolandSala,Fernando Cesareng2006-09-20T00:00:00Zoai:scielo:S0103-90162006000500008Revistahttp://revistas.usp.br/sa/indexPUBhttps://old.scielo.br/oai/scielo-oai.phpscientia@usp.br||alleoni@usp.br1678-992X0103-9016opendoar:2006-09-20T00:00Scientia Agrícola (Online) - Universidade de São Paulo (USP)false |
dc.title.none.fl_str_mv |
Hot pepper (Capsicum chinense, Jacq.) inheritance of reaction to powdery mildew |
title |
Hot pepper (Capsicum chinense, Jacq.) inheritance of reaction to powdery mildew |
spellingShingle |
Hot pepper (Capsicum chinense, Jacq.) inheritance of reaction to powdery mildew Blat,Sally Ferreira Leveillula taurica (LEV.) Arn. Capsicum chinense genetic resistance gene action |
title_short |
Hot pepper (Capsicum chinense, Jacq.) inheritance of reaction to powdery mildew |
title_full |
Hot pepper (Capsicum chinense, Jacq.) inheritance of reaction to powdery mildew |
title_fullStr |
Hot pepper (Capsicum chinense, Jacq.) inheritance of reaction to powdery mildew |
title_full_unstemmed |
Hot pepper (Capsicum chinense, Jacq.) inheritance of reaction to powdery mildew |
title_sort |
Hot pepper (Capsicum chinense, Jacq.) inheritance of reaction to powdery mildew |
author |
Blat,Sally Ferreira |
author_facet |
Blat,Sally Ferreira Costa,Cyro Paulino da Vencovsky,Roland Sala,Fernando Cesar |
author_role |
author |
author2 |
Costa,Cyro Paulino da Vencovsky,Roland Sala,Fernando Cesar |
author2_role |
author author author |
dc.contributor.author.fl_str_mv |
Blat,Sally Ferreira Costa,Cyro Paulino da Vencovsky,Roland Sala,Fernando Cesar |
dc.subject.por.fl_str_mv |
Leveillula taurica (LEV.) Arn. Capsicum chinense genetic resistance gene action |
topic |
Leveillula taurica (LEV.) Arn. Capsicum chinense genetic resistance gene action |
description |
The pepper species C. chinense has been considered one of the most important resistance sources to powdery mildew Capsicum spp. However, the inheritance in this species was unknown. The purpose of this work was to study its reaction inheritance. Two powdery mildew resistant parents, 'Pimenta Cheiro' 1 and PI 152225 and two moderately susceptible ones, 'Pimenta Doce' IH-1761 and 'Pimenta Índio', were used to obtain three F1 and their respective F2 generations: 'Pimenta Doce' IH-1761 <FONT FACE=Symbol>´</FONT> 'Pimenta Cheiro' 1, 'Pimenta Índio' <FONT FACE=Symbol>´</FONT> PI 152225 and 'Pimenta Doce' IH-1761 <FONT FACE=Symbol>´</FONT> PI 152225. The powdery mildew epidemy was natural using inoculum from a highly-sporulating susceptible pepper host. Powdery mildew host reaction evaluations were carried out during the fruiting stage using a rating system based on disease severity scales varying from 1 (resistant) to 5 (highly susceptible). The experimental design was completely randomized. The following genetic parameters were estimated: gene action, heritability coefficient and expected selection gain in the F3 generation. The transgressive segregation in F2 indicated oligogenic inheritance. Results show the presence of additive, dominant, and epistatic gene action. The dominant and epistatic effects detected in crosses presented negative values, tending towards susceptibility. The heritability and selection gain estimates were moderate, with values of 35.5% and 1.7% for 'Pimenta Doce' IH 1761 <FONT FACE=Symbol>´</FONT> 'Pimenta Cheiro' 1, from 50.4% to 3.5% for 'Pimenta Índio' <FONT FACE=Symbol>´</FONT> PI 152225, and 49% and 2.7% for the 'Pimenta Doce' IH 1761 <FONT FACE=Symbol>´</FONT> PI 152225 crosses, respectively. These gene action results are favorable for breeding programs and exploration of hybrids. |
publishDate |
2006 |
dc.date.none.fl_str_mv |
2006-10-01 |
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=S0103-90162006000500008 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162006000500008 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/S0103-90162006000500008 |
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 |
Escola Superior de Agricultura "Luiz de Queiroz" |
publisher.none.fl_str_mv |
Escola Superior de Agricultura "Luiz de Queiroz" |
dc.source.none.fl_str_mv |
Scientia Agricola v.63 n.5 2006 reponame:Scientia Agrícola (Online) instname:Universidade de São Paulo (USP) instacron:USP |
instname_str |
Universidade de São Paulo (USP) |
instacron_str |
USP |
institution |
USP |
reponame_str |
Scientia Agrícola (Online) |
collection |
Scientia Agrícola (Online) |
repository.name.fl_str_mv |
Scientia Agrícola (Online) - Universidade de São Paulo (USP) |
repository.mail.fl_str_mv |
scientia@usp.br||alleoni@usp.br |
_version_ |
1748936460178817024 |