Inheritance of Resistance to<i>Heterodera glycines</i>Race 3 in Soybean Accessions

Rao-Arelli, A. P.

doi:10.1094/pd-78-0898

Cited by 56 publications

(49 citation statements)

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“…This QTL region showed the highest effect ever reported for a single SCN resistance QTL. Genetic studies reported five major genes, Rhg1 to Rhg5, underlying resistance to different SCN races (Rao-Arelli 1994). The QTL conferring a high level of resistance to SCN in many sources was mapped to the regions containing rhg1 and Rhg4 on Chrs.…”

Section: Discussionmentioning

confidence: 99%

Reaction of Soybean Cyst Nematode Resistant Plant Introductions to Root-Knot and Reniform Nematodes

Lee¹,

Kim²,

Robbins³

et al. 2015

Plant Breed. Biotech.

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This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited. Out of these accessions, 64 PIs were identified with high or moderate resistance to RKN. Of these 64 lines, 24 accessions showed good resistance to both RKN and RN. These new sources of resistance to multiple nematodes will be valuable materials for soybean breeding programs to develop new resistant cultivars that can overcome yield losses caused by one or more of these nematode species.

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Section: Discussionmentioning

confidence: 99%

Reaction of Soybean Cyst Nematode Resistant Plant Introductions to Root-Knot and Reniform Nematodes

Lee¹,

Kim²,

Robbins³

et al. 2015

Plant Breed. Biotech.

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“…A existência de ligação gênica (cluster de genes) e de alelismo múltiplo não podem ser descartados (RAO-ARELLI, 1994;CONCIBIDO et al 1997 D : é a diferença fenotípica entre as médias dos genitores homozigóticos; C : é a correção para efeitos microambientais, já que D é fenotípico;…”

Section: Methodsunclassified

Parâmetros genéticos da resistência da soja ao nematóide de cisto Raça 1

et al. 2008

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de freqüência e a análise de variância e, então, estimado o número de locos segregantes envolvidos na resistência das linhagens ao NCS (raça 1). Estimou-se o progresso de seleção (i = -2,154) entre as linhagens avaliadas (com diferentes números de repetições), bem como a herdabilidade em nível de média (h 2 ). Assim conclui-se que: a) A distribuição de normalidade das médias dos IF, bem como a estimativa da herdabilidade e a estimativa do número de locos segregantes indicam que a resposta das linhagens ao NCS (raça 1) tem caráter de herança poligênica; b) Foram encontradas linhagens promissoras para resistência ao NCS, porém, como este é de difícil avaliação recomenda-se utilizar maior número de linhagens F 6 na avaliação fenotípica e maior número de repetições para avaliação da reação ao NCS; c) A necessidade de se fazer correção para efeitos macroambientais aumentou o erro das estimativas.Palavras-chave: Heterodera glycines, resistência genética, Glycine max, ganho de seleção. ABSTRACT GENETIC PARAMETERS FOR SOYBEAN RESISTANCE TO RACE 1 CYST NEMATODEThis study aimed at verify the behavior of Recombinant Inbreed Lines, resulting of a cross between Hartwig (resistant parental) and EMGOPA-316 (susceptible parental) to NCS soybean nematode (race 1) and to estimate genetic parameters and those of selection progress. Estimated parameters used the mean female index (IF) obtained through the evaluation of 176 F 6 lines for NCS resistance. The genotypes were evaluated in greenhouse. The frequency distribution and the variance analyses were performed to estimate the number of segregating loci involved in the resistance to NCS. The selection progress was estimated (i = -2,154) among the lines evaluated using different numbers of repetitions, as well the herdability (h 2 ). It was concluded that: a) The normality distribution of the average IF, as well the estimated herdability and the number o segregation loci indicated the resistance to NCS (race 1) is poligenic; b) Promising NCS resistant lines were found. However, as the resistance test is difficult a larger number of F 6 lines and a larger number of repetitions should be evaluated; c) The necessity of correction due to macroenvironment effects increased the bias of the estimatives.

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“…In Peking, a dominant resistance gene (Rhg4) was later identified that is found to be linked to the i locus underlying seed coat color (Matson and Williams 1965). Another resistant gene, Rhg5, was reported to be in PI 88788 (Rao-Arelli 1994). It has been suggested that genes necessary for full resistance to SCN include Rhg1-5 and may extend to ten independently inherited genes.…”

Section: Idh2 Fasmentioning

confidence: 99%