Pré-melhoramento do camucamuzeiro: estudo de parâmetros genéticos e dissimilaridade

Nascimento, W. M. O. do; Gurgel, F. de L.; Bhering, Leonardo Lopes; Ribeiro, Olívia Domingues

doi:10.1590/0034-737x201461040013

Cited by 12 publications

(12 citation statements)

References 4 publications

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“…According to Hamrick (1983), the distribution of genetic variation is not random within populations; instead, it is determined by the reproductive system, the geographical distribution, and the effective population size. Similar to the high genetic diversity observed in this study Nascimento et al (2014) also reported high genetic diversity based on morphological and agronomical characters. The authors showed high genetic variability among progenies of Myrciaria dubia and recommended a direct selection method to assist the process of domestication and improvement of this species.…”

Section: Discussionsupporting

confidence: 90%

Myrciaria dubia, an Amazonian fruit: population structure and its implications for germplasm conservation and genetic improvement

Nunes¹,

Setotaw²,

Pasqual³

et al. 2017

Genet. Mol. Res.

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ABSTRACT. Myrciaria dubia (camu-camu) is an Amazon tree that produces a tart fruit with high vitamin C content. It is probably the fruit with the highest vitamin C content among all Brazilian fruit crops and it can be used to supplement daily vitamin C dose. This property has attracted the attention of consumers and, consequently, encouraged fruit farmers to produce it. In order to identify and select potential accessions for commercial exploitation and breeding programs, M. dubia has received considerable research attention. The identification and characterization of genetic diversity, as well as identification of the population structure of accessions preserved in germplasm banks are fundamental for the success of any breeding program. The objective of this study was to evaluate the genetic variability of 10 M. dubia populations obtained from the shores of Reis Lake, located in the municipality of Caracaraí, Roraima, Brazil. Fourteen polymorphic inter simple sequence repeat (ISSR) markers were used to study the population genetic diversity, which resulted in 108 identified alleles. Among the 14 primers, GCV, UBC810, and UBC827 produced the highest number of alleles. The study illustrated the suitability and efficiency of ISSR markers to study the genetic diversity of M. dubia accessions. We also revealed the existence of high genetic variability among both accessions and populations that can be exploited in future breeding programs and conservation activities of this species.

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Section: Discussionsupporting

confidence: 90%

Myrciaria dubia, an Amazonian fruit: population structure and its implications for germplasm conservation and genetic improvement

Nunes¹,

Setotaw²,

Pasqual³

et al. 2017

Genet. Mol. Res.

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“…The individual heritability of the number of fruits in 4 harvests, increased to 48%, favoring a selective precision of 70%. Similarly, Nascimento et al (2014) found that "fruit weight" and "bark weight" accounted for 54.09% of the variation among progenies, verifying that the causes are more genetic than environmental. The "fruit weight" also stands out for its high heritability (0.96), desirable for an improvement program.…”

Section: Discussionmentioning

confidence: 84%

Selection of Superior Genotypes in 37 Clones of Camu-Camu by Repetitivity Analysis

Panduro¹,

Chagas²,

Dávila³

et al. 2017

JAS

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In order to select camu-camu superior genotypes, a comparative of clones from natural populations, farmer plantations and an experimental field of the National Institute of Agrarian Innovation (INIA), was established in 2004 in varzea, at the Peruvian Amazon Research Institute (IIAP). Nine harvests between 2006 and 2016 have been evaluated, including variables in vegetative and reproductive development states. Statistical analysis was performed using the SPSS program for analysis of variance and SELEGEN REML/BLUP for repetitivity analysis of "fruit yield" (FY) and "fruit weight" (FW) with 5 and 4 measurements (years) respectively. For FY, a repetitivity index r = 0.117±0.07 was obtained with a selective precision of 0.63 and efficiency of 1.84 where clones 69, 48, 58, 50, 61, 13, 18, 29, 49 and 32, were selected in descending order of merit. For FW, r = 0.690±0.294 was obtained with selective precision of 0.948, efficiency of 1.14 and selection of clones 44, 13, 26, 23, 69, 64 22, 52, 27 and 8. As for the content in ascorbic acid, clones 48, 32 and 35 occupied the first places with more than 2000 mg of ascorbic acid/100 g. The selections achieved strengthened the pre-improvement work by conferring vigour y fiavility of a long term research.

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“…The genetic correlation between traits denotes the degree of genetic association between them (Pires et al 2011) and allows the breeder to perform indirect selection when a trait presents favorable and significant correlation with another trait of interest and of easy evaluation (Nascimento et al 2014).…”

Section: Resultsmentioning

confidence: 99%

“…However, besides being divergent, the cross between materials that present good performance is desirable to ensure the success of the progenies (Nascimento et al 2014). To select genotypes considering a combination of desirable traits, a selection index that enables evaluating a genotypic aggregate should be used (Freitas et al 2013), such as the Mulamba and Mock (1978)'s rank index, which is usually applied to a simultaneous selection of traits.…”

Section: Introductionmentioning

confidence: 99%

Genetic parameters and selection of macaw palm (Acrocomia aculeata) accessions: an alternative crop for biofuels

Costa

Motoike

Corrêa

et al. 2018

Crop Breed. Appl. Biotechnol.

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This study aimed to estimate the parameters related to the genetic control of the physical characteristics of the fruits, oil content, and oil yield, and to proceed with the selection of macaw palm accessions. Forty-four macaw palm accessions of the active germplasm collection of the Federal University of Viçosa were collected for the evaluation of epicarp dry matter, pulp dry matter, endocarp dry matter, kernel dry matter, oil content, and oil yield. Narrow-sense individual heritability estimates were considered as of intermediate magnitude. The coefficient of repeatability and the accuracy in family selection was of high magnitude. Oil yield per plant presented the highest coefficient of individual genetic variation. Five different accessions contributed to the ten first individuals selected by the individual BLUP. The Mulamba and Mock's rank index allowed classifying the accessions in a sequence favorable to selection.

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Pré-melhoramento do camucamuzeiro: estudo de parâmetros genéticos e dissimilaridade

Cited by 12 publications

References 4 publications

Myrciaria dubia, an Amazonian fruit: population structure and its implications for germplasm conservation and genetic improvement

Myrciaria dubia, an Amazonian fruit: population structure and its implications for germplasm conservation and genetic improvement

Selection of Superior Genotypes in 37 Clones of Camu-Camu by Repetitivity Analysis

Genetic parameters and selection of macaw palm (Acrocomia aculeata) accessions: an alternative crop for biofuels

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