Minimum number of common bean plants per plot to assess field resistance to white mold

Carneiro, Flávia Fernandes; Zeviani, Walmes Marques; Santos, João Bosco dos; Carvalho, Renato Sérgio Batista; Alves, Filipe Couto; Dias, Juliana Andrade

doi:10.1590/s1984-70332011000400010

Cited by 5 publications

(4 citation statements)

References 16 publications

(15 reference statements)

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“…The germplasm screening methods for white mold in common bean can be classified into those using to identify susceptible and resistant white mold genotypes in dry bean and soybean. Carneiro et al (2011) used the cut-stem method to evaluate 13 common bean cultivars against six isolates of S. sclerotiorum and to determine the minimum number of plants per plot required for the field test. They found no significant interaction between the pathogen isolates and cultivars, and eight plants per plot were adequate to assess the disease reaction.…”

Section: Germplasm Screening Methodsmentioning

confidence: 99%

Breeding Common Bean for Resistance to White Mold: A Review

2013

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Under favorable weather conditions white mold causes 100% loss of yield and quality of susceptible common bean (Phaseolus vulgaris L.) cultivars. The disease is endemic and widespread in North and South American countries including the United States, Canada, Argentina, and Brazil. Our objective was to review progress achieved in identifying sources of resistance in Phaseolus species, genetics, and breeding for resistance to white mold. We also describe an integrated genetic improvement strategy for resistance to the pathogen with germplasm enhancement and cultivar development using multiple‐parent crosses and gamete selection methods of breeding. Substantial progress has been made in understanding pathogenic variation in the white mold fungus, developing screening methods, identifying sources of resistant germplasm, genetics of resistance, and introgressing resistance from the secondary gene pool, and breeding for resistance to white mold. Also, molecular marker‐assisted selection for partial resistance is practiced. However, development of white mold resistant common bean cultivars in most market classes has been slow and localized. Breeding strategies for simultaneous and integrated genetic improvement of qualitatively and quantitatively inherited resistances to white mold and cultivar development are briefly described.

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Section: Germplasm Screening Methodsmentioning

confidence: 99%

Breeding Common Bean for Resistance to White Mold: A Review

2013

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“…Kim et al (2000) found that the genotype-by-environment interaction was significant in field evaluations. However, field evaluation through the straw test ensures the presence of the pathogen and development of the disease using the same crop conditions, without the space limitation that occurs in controlled environments (Carneiro et al, 2011). Moreover, the ability to assess both physiological resistance and escape mechanisms is another advantage of field inoculation under crop conditions.…”

Section: Introductionmentioning

confidence: 99%

“…For analysis of the host-by-pathogen interaction, the data regarding reaction of genotypes to S. sclerotiorum isolates have been commonly assessed by ANOVA. However, a methodology using a partial diallel arrangement, as proposed by Melo and Santos (1999), has proven to be efficient in distinguishing horizontal and vertical resistance, pathogen aggressiveness, and estimating the genetic effect of resistance from each line and aggressiveness from each isolate (Buiate et al, 2010;Carneiro et al, 2011;Pereira, 2013). A GGE biplot analysis is another methodology that may be used to determine the levels of host resistance and isolate aggressiveness (Yan and Kang, 2002).…”

Section: Introductionmentioning

confidence: 99%

Reaction of common bean lines and aggressiveness of Sclerotinia sclerotiorum isolates

et al. 2014

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The aims of this study were to evaluate the reaction of common bean lines to white mold, the aggressiveness of different Sclerotinia sclerotiorum isolates from various common bean production areas in Brazil, and comparison of the diallel and GGE (genotype main effect plus genotype-by-environment interaction) biplot analysis procedures via study of the line-by-isolate interaction. Eleven common bean (Phaseolus vulgaris) lines derived from 3 backcross populations were used. Field experiments were performed in the experimental area of the Departamento de Biologia of the Universidade Federal de Lavras, Lavras, MG, Brazil, in the 2011 and 2012 dry crop season and 2011 winter crop season through a randomized block design with 3 replications. This study was also set up in a greenhouse. Inoculations were performed 28 days after sowing by means of the straw test method. The reaction of the bean lines to white mold was assessed according to a diagrammatic scale from 1 (plant without symptoms) to 9 (dead plant). Estimations of general reaction capacity (lines) and general aggressiveness capacity (isolates) indicated different horizontal levels of resistance in the lines and levels of aggressiveness in the isolates. Therefore, it was possible to select more resistant lines and foresee those crosses that are the most promising for increasing the level of resistance. It was also possible to identify the most aggressive isolates that were more efficient in distinguishing the lines. Both diallel and GGE biplot analyses were useful in identifying the genotypic values of lines and isolates.

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“…No caso do modelo do CV relativo (CARNEIRO et al, 2011), a curva foi ajustada a partir do seguinte modelo teórico:…”

Section: Methodsunclassified