A method for combining molecular markers and phenotypic attributes for classifying plant genotypes

Franco, Jorge; Crossa, J.; Ribaut, Jean-Marcel; Betrán, Javier; Warburton, Marilyn L.; Khairallah, M.

doi:10.1007/s001220100641

Cited by 111 publications

(83 citation statements)

References 15 publications

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“…This bias can be observed from the correlation between combined and molecular distances (0.65), compared to combined and morphological distances (0.05). Other studies have reported that such techniques employed individually produce results distinct from the combined analyses (Franco et al, 2001). This can be explained by the different properties of each analysis and the way each one assessed genome variability.…”

Section: Resultsmentioning

confidence: 99%

“…Some studies on wheat have reported the association between hybrid performance and morphological (Cruz et al, 2004), molecular (Roy et al, 2004), combined morphological and molecular (Franco et al, 2001;Vieira et al, 2007), and pedigree-based distances (Almanza-Pinzón et al, 2003). Such tools are important auxiliary techniques for the selection of the best parental combinations and for a more rational use of germplasm.…”

Section: Introductionmentioning

confidence: 99%

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Morphological, pedigree, and molecular distances and their association with hybrid wheat performance

Bertan

Carvalho

Oliveira

et al. 2009

Pesq. agropec. bras.

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-The objectives of this work were to estimate the genetic distance among wheat genotypes using morphological, pedigree, molecular, and combined morphological and molecular measures, to determine the correlations between these measures, and to evaluate the combining ability of the genotypes. Three generations and two planting designs were studied. Six wheat genotypes were crossed using a diallel design. The F 1 , F 2 and F 3 generations were evaluated in the fi eld, in the crop seasons of 2003, 2004 and 2005, under spaced plant and full-row planting designs. The estimated general and specifi c combining abilities of tested hybrids were infl uenced both by the generation and the planting design. The correlation coeffi cients among the distance measures and between these measures and genotype performances of different generations for the two planting designs were low to moderate. In order to obtain a more precise estimate of the genetic distance among cultivars and its association with the hybrid performance, more than one generation, planting design, and genetic distance estimation technique should be employed.Index terms: Triticum aestivum, combining ability, genetic variability, parental selection. Distâncias morfológicas, genealógicas e moleculares e suas associações com o desempenho de híbridos em trigoResumo -O objetivo deste trabalho foi estimar a distância genética entre genótipos de trigo, por meio de dados morfológicos, genealógicos, marcadores moleculares AFLP ("amplifi ed fragment length polymorphism"), usados individualmente ou simultaneamente, e calcular a correlação entre essas medidas de distância e a capacidade de combinação dos genótipos. Foram estudadas três gerações e dois sistemas de semeadura. Seis genótipos de trigo foram cruzados de forma dialélica. Os híbridos F 1 e as populações F 2 e F 3 foram avaliados em campo, nos anos agrícolas de 2003, 2004 e 2005, com os esquemas de semeadura de planta espaçada e em linha cheia. As capacidades gerais e específi cas de combinação dos híbridos testados foram infl uenciadas tanto pela geração quanto pelo esquema de semeadura. Os coefi cientes de correlação foram de baixo a moderado entre as medidas de distância e entre estas e o desempenho dos genótipos, nos dois esquemas de semeadura. Para a obtenção de uma estimativa fi el da distância genética entre cultivares e da sua associação com o desempenho dos híbridos, devem ser empregados mais de uma geração, sistema de semeadura e técnica de estimativa da distância genética.Termos para indexação: Triticum aestivum, capacidade de combinação, variabilidade genética, seleção de genitores.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Morphological, pedigree, and molecular distances and their association with hybrid wheat performance

Bertan

Carvalho

Oliveira

et al. 2009

Pesq. agropec. bras.

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“…In addition, there are almost very few analyses combining data sets of different nature, i.e. qualitative and quantitative morphological data, or morphological and molecular marker data (Franco et al, 1997;Franco et al, 1998;Franco et al, 2001). Such kind of analyses could provide evidence whether a better estimate of the genetic diversity is obtainable and also whether the total evidence is within the confidence limits of evidence from the individual data sets.…”

Section: Introductionmentioning

confidence: 99%

Description and analysis of genetic diversity among squash accessions

Tsivelikas

Koutita

Anastasiadou

et al. 2009

Braz. arch. biol. technol.

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“…Studies focussing on agronomic traits, qualitative traits, reproductive traits and genetic variability are of utmost significance for a thorough investigation of extent of phenetic diversity in germplasm and for utilizing the genetic information for crossing and breeding programmes (Franco et al, 2001;Montes and Melchinger, 2016). For successful crop enhancement and commercial exploitation of the biofuel plant, J. curcas improvement programs should aim at agronomic traits like low male to female flower ratio, high seed yield and oil content, abiotic and biotic stress resistance, and high natural ramification of branches with greater canopy spread.…”

Section: Introductionmentioning

confidence: 99%

Morphometric characterization of Jatropha curcas germplasm of North-East India

Basu¹,

Gunupuru²,

Sahoo³

2017

Afr. J. Biotechnol.

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The morphological variation among Jatropha curcas L. populations from 29 different locations of NorthEast India was determined. Four populations from other parts of India were also incorporated in the study as an out-group. The morphological trait based analysis of J. curcas revealed large variation of quantitative traits among the populations. Of the six morphological traits used in this study, the highest variation (% coefficient of variation=23.19) was observed in floral sex ratio (M: F) while canopy spread (CS) appeared as the least variable trait (% coefficient of variation=1.67). Based on morphometric trait values, the three populations from Assam (IITJC15, IITJC24 and IITJC28) and one population from Arunachal Pradesh (IITJC7) emerged as superior when compared with the other populations. Both cluster and principal component analyses depicted that the populations IITJC19, IITJC21, IITJC22 and IITJC24 from Assam maintained maximum inter-cluster distance from the rest of the populations and are, thus, substantially distinct. The analyses also depicted that no clear demarcation can be made between populations from North-Eastern India and other areas on the basis of morphometric variability alone. Morphometric characterization of J. curcas populations leads to the identification of seven promising populations (IITJC7, IITJC15, IITJC19, IITJC21, IITJC22, IITJC24 and IITJC28) from North-East India which can substantially contribute to Jatropha breeding in the future. From the study of variance components and broad sense heritability, it was suggested that the selection of elite plants on the basis of M: F ratio, 100 seed weight (100SW) and total seed yield (TSY) in tree improvement programs is likely to be more successful.

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A method for combining molecular markers and phenotypic attributes for classifying plant genotypes

Cited by 111 publications

References 15 publications

Morphological, pedigree, and molecular distances and their association with hybrid wheat performance

Morphological, pedigree, and molecular distances and their association with hybrid wheat performance

Description and analysis of genetic diversity among squash accessions

Morphometric characterization of Jatropha curcas germplasm of North-East India

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