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Effectiveness of selection, parent-offspring correlation and regression in bacterial blight resistance genes introgressed rice segregating population / Efetividade da seleção, correlação pais-prole e regressão nos genes de resistência à ferrugem bacteriana introgressaram a população segregante de arroz
Govintharaj, Ponnaiah; Tannidi, Shalini; Swaminathan, Manonmani; Sabariappan, Robin.
  • Govintharaj, Ponnaiah; Tamil Nadu Agricultural University. Centre for Plant Breeding and Genetics. Department of Rice. Tamil Nadu. IN
  • Tannidi, Shalini; Tamil Nadu Agricultural University. Centre for Plant Breeding and Genetics. Department of Rice. Tamil Nadu. IN
  • Swaminathan, Manonmani; Tamil Nadu Agricultural University. Centre for Plant Breeding and Genetics. Department of Rice. Tamil Nadu. IN
  • Sabariappan, Robin; Tamil Nadu Agricultural University. Centre for Plant Breeding and Genetics. Department of Rice. Tamil Nadu. IN
Ciênc. rural (Online) ; 47(9): e20160987, 2017. tab, graf
Article in English | LILACS | ID: biblio-1044943
ABSTRACT
ABSTRACT The effectiveness of early generation selection was practiced in bacterial blight resistance genes introgressed F2 and F23 population of the cross CB 174 R × IRBB 60 in rice. F2 Selection have been proved to be robust and effective tool in crop improvement program. Selection differential was positive for all studied traits. Selection response was high for number of grains, thus indicating the effectiveness of selection for these character. Realized heritability was found high for number of grains and thousand grain weight, suggested that direct selection was effective. Expected selection response and predicted genetic gain was high for number of grains. Parent-offspring correlation showed low but significance association for number of productive tillers (r=0.47**, P<0.01), single plant yield (r=0.35**, P<0.01) and (r=0.30*, P<0.05) panicle length in F2 and F23 generation indicates that selection was fruitful in early generation. Statistically regression coefficient was not significant linear dependence of the mean of F2 and F23 generation.
RESUMO
RESUMO A eficácia da selecção das primeiras gerações foi praticada na população F2 e F2 3 de CB 174 R × IRBB 60 do gene bacteriano. A seleção foi positiva para todos os caracteres estudados. A resposta de seleção foi alta para o número de grãos. A herdabilidade realizada foi encontrada alta para o número de grãos e mil grãos de peso, sugeriu que a seleção direta foi eficaz. A resposta à seleção esperada e o ganho genético previsto foi elevado para o número de grãos. A correlação entre pais e filhos mostrou forte associação com o número de latifundiários produtivos (r = 0,47**, P<0,01), produção única de planta (r = 0,35**, P<0,01) e (r = 0,30*, P<0,05) Comprimento em F2 e F23 geração indica que a seleção foi frutífera. O coeficiente de regressão estatística não foi dependência linear significativa da média de F2 e F23 geração.


Full text: Available Index: LILACS (Americas) Language: English Journal: Ciênc. rural (Online) Journal subject: Sa£de Ambiental Year: 2017 Type: Article Affiliation country: India Institution/Affiliation country: Tamil Nadu Agricultural University/IN

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Full text: Available Index: LILACS (Americas) Language: English Journal: Ciênc. rural (Online) Journal subject: Sa£de Ambiental Year: 2017 Type: Article Affiliation country: India Institution/Affiliation country: Tamil Nadu Agricultural University/IN