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  <titleInfo>
    <title>Gene effects from Bipolaris maydis incidence and severity on popcorn</title>
  </titleInfo>
  <name type="personal">
    <namePart>Santos, Juliana Saltires</namePart>
    <role>
      <roleTerm authority="marcrelator" type="text">creator</roleTerm>
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  <name type="personal">
    <namePart>Vivas, Marcelo</namePart>
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  <name type="personal">
    <namePart>Amaral Júnior, Antônio Teixeira do</namePart>
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  <name type="personal">
    <namePart>Ribeiro, Rodrigo Moreira</namePart>
    <role>
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    </role>
  </name>
  <name type="personal">
    <namePart>Mafra, Gabrielle Sousa</namePart>
    <role>
      <roleTerm authority="marcrelator" type="text">creator</roleTerm>
    </role>
  </name>
  <name type="personal">
    <namePart>Pena, Guilherme Ferreira</namePart>
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      <roleTerm authority="marcrelator" type="text">creator</roleTerm>
    </role>
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  <genre authority="marc">periodical</genre>
  <genre authority="marc">abstract or summary</genre>
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  <abstract>


ABSTRACT:   Popcorn suffers severe economic losses resulting from harmful effects caused by several diseases such as southern corn leaf blight (SCLB), which is one of the main leaf diseases able to cause considerable damages to corn crops. The realization conducting genetic studies in order to identify genotypes presenting genetic resistance to this disease it is essential. Accordingly, the aim of the current study is to estimate gene effects and combining abilities in popcorn, with emphasis on the resistance to Bipolaris maydis. Full diallel crosses were performed, including reciprocal crosses between eight lines (L76, L88, L70, L77, L55, L61, P1 and P8), in order to produce 56 hybrids (F1’s and reciprocal hybrids). The experiment followed a randomized block design, with  four  replicates;  in  two  different  cultivation  periods  (first  and  second  periods),  in  Campos  dos  Goytacazes,  RJ.  Southern corn leaf blight incidence and severity, caused by B. maydis, were assessed in each cultivation period. No reciprocal effect was observed for the evaluated characteristics, since the diallel analysis did not find significant effect from this variation source. With respect to SCLB incidence and severity in the two cultivation periods, the mean square of the effects showed that the dominance components were superior to the additivity ones. Hybrids that stood out in the two cultivation periods to the assessed features were: L88 x L61, L88 x L70, L88 x L76, L61 x L77, L61 x P1, L70 x P1, P1 x L76, L77 x L76, and P8 x L77.  



Key words:      combining ability; genetic resistance; southern corn leaf blight; Zea mays L</abstract>
  <abstract>


RESUMO:    O  milho-pipoca  sofre  severas  perdas  econômicas  devido  aos  efeitos  danosos  da  incidência  de  doenças.  A  helmintosporiose é uma das principais doenças foliares e representa um considerável potencial de dano à cultura; tornando-se evidente a necessidade de estudos genéticos visando à identificação de genótipos que apresentem resistência genética para essa  doença.  O  estudo  teve  por  objetivo  estimar  os  efeitos  gênicos  e  as  capacidades  combinatórias  em  milho-pipoca,  com  enfoque  para  a  resistência  a  Bipolaris  maydis.  Foram  realizados  cruzamentos  dialélicos  completos,  incluindo  os  recíprocos  entre  oito  linhagens  (L76,  L88,  L70,  L77,  L55,  L61,  P1  e  P8),  para  a  obtenção  de  56  híbridos  (F1’s  e  recíprocos).  Instalou-se experimento em delineamento em blocos ao acaso com quatro repetições, em duas épocas de cultivo, em Campos dos Goytacazes, RJ. Avaliaram-se a incidência e a severidade causada por B. maydis para cada época. Observou-se a ausência de efeito recíproco para as características avaliadas, uma vez que não houve efeito significativo desta fonte de variação na análise  dialélica.  Para  a  incidência  e  severidade  de  helmintosporiose,  nas  duas  épocas  de  cultivo,  o  quadrado  médio  dos  efeitos revelou que os componentes de dominância foram superiores aos de aditividade. Os híbridos que se destacaram, nas duas épocas de cultivo, com base no conjunto de características avaliadas, foram: L88 x L61, L88 x L70, L88 x L76, L61 x L77, L61 x P1, L70 x P1, P1 x L76, L77 x L76 e P8 x L77.  



 Palavras-chave:      capacidade combinatória; resistência genética; helmintosporiose; Zea mays L.</abstract>
  <note>

Publicação online; 34 ref.; 3 tables; Summaries (En, Pt)</note>
  <subject>
    <topic>MILHO PIPOCA</topic>
  </subject>
  <subject>
    <topic>DOENÇA DE PLANTA</topic>
  </subject>
  <subject>
    <topic>HELMINTOSPORIOSE</topic>
  </subject>
  <subject>
    <topic>PERDA DA PRODUÇÃO</topic>
  </subject>
  <subject>
    <topic>GENÓTIPO</topic>
  </subject>
  <subject>
    <topic>RESISTÊNCIA GENÉTICA</topic>
  </subject>
  <subject>
    <topic>DEFESA VEGETAL</topic>
  </subject>
  <relatedItem type="host">
    <titleInfo>
      <title>Revista Brasileira de Ciências Agrárias (Brazil)</title>
    </titleInfo>
    <originInfo>
      <publisher>Recife-PE Universidade Federal Rural de Pernambuco 2006</publisher>
    </originInfo>
    <identifier>2026-1601</identifier>
    <identifier type="issn">1981-1160</identifier>
    <identifier type="local">BR2026000113</identifier>
    <part>
      <text>v. 14(4) p. 1-7; (2019)</text>
    </part>
  </relatedItem>
  <identifier type="uri">http://www.agraria.pro.br/ojs32/index.php/RBCA/article/view/v14i4a5677/v14i4a5677</identifier>
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    <url>http://www.agraria.pro.br/ojs32/index.php/RBCA/article/view/v14i4a5677/v14i4a5677</url>
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    <recordCreationDate encoding="marc">260414</recordCreationDate>
    <recordChangeDate encoding="iso8601">20260414101545.0</recordChangeDate>
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      <languageTerm authority="iso639-2b" type="code">eng</languageTerm>
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