scholarly journals A further look of the genetic origin and singularity of the Torbiscal Iberian pig line

2019 ◽  
Vol 17 (1) ◽  
pp. e0402 ◽  
Author(s):  
Carmen Rodríguez-Valdovinos ◽  
Juan García-Casco ◽  
Fabián García-Ruiz ◽  
Yolanda Núñez-Moreno ◽  
Luis Silió-López
Keyword(s):  
Muscle Development ◽  
Strain Differences ◽  
Diallel Cross ◽  
Genetic Origin ◽  
European Origin ◽  
Complete Diallel Cross ◽  
Structure Algorithm ◽  
Iberian Pig ◽  
Successive Generations ◽  
Wild Pig

Although the Torbiscal line of Iberian pigs has been largely studied, some aspects of its history are not well known. In this paper, we used pedigree-based methods on a complete genealogy of 4,077 entries in order to get a comprehensive analysis of its four founder strains and to evaluate the expected genetic contribution of each ancestral strain to the successive generations of the composite Torbiscal line. Between-strain differences and specific heterotic effects on piglet weight at 50 days of age were estimated from records of 9,052 piglets born in 1,571 litters of a complete diallel cross among the four strains. Moreover, we assessed the genetic singularity of the current Torbiscal pigs by other three studies, based on whole genome SNP genotypes, focused on the measure of its genetic diversity and differentiation with respect to other domestic and wild pig populations. The STRUCTURE algorithm detected two uppermost levels of the whole population structure, corresponding to European and Asian ancestries. These results confirmed the exclusive European origin of the Torbiscal and other Iberian pigs and the admixed origin of the Duroc breed. Finally, the comparison of Torbiscal with a representative pool of Iberian pigs showed a maximum genetic differentiation in regions of chromosomes three and seven, including some genes related to the regulation of muscle development.

Establishment and genetic analysis of complete diallel cross families of pearl oyster (Pinctada fucata)

2010 ◽  
Vol 34 (1) ◽  
pp. 26-31
Author(s):  
Long-chun GU ◽  
Jin-bi LI ◽  
Da-hui YU ◽  
Gui-ju HUANG ◽  
Jian-ye LIU
Keyword(s):  
Genetic Analysis ◽  
Diallel Cross ◽  
Pearl Oyster ◽  
Pinctada Fucata ◽  
Complete Diallel Cross

scholarly journals Improvement of methods of creating hybrids of cabbage

2019 ◽  
pp. 3-7 ◽  
Author(s):  
Anna I. Mineykina ◽  
Lyudmila L. Bondareva ◽  
Darya V. Shumilina ◽  
Elena A. Domblides ◽  
Alexey V. Soldatenko
Keyword(s):  
First Generation ◽  
Microspore Culture ◽  
Diallel Cross ◽  
High Yield ◽  
Isolated Microspores ◽  
Economically Valuable Traits ◽  
Complete Diallel Cross ◽  
Speed Up ◽  
Pure Lines

Relevance One of the basic directions of the cabbage crop breeding is the creation of F1 hybrids with a complex of economically valuable traits. This process is difficult and time-consuming as to get pure lines must be within 6-12 years hold inbreeding. Herewith not every line gives the desired heterotic effect that also requires additional verification. Methods Biotechnological method culture of isolated microspores in vitro, which allows in the first generation to receive a line with 100% homozygosity, was used to speed up the breeding process. Combination ability were performed in complete diallel cross on the basic morphological signs. Results Culture medium for cultivation of isolated microspores in vitro was optimized for each genotype of cabbage for the best embryoids regeneration. Maximum amount of embryoids was received on medium with pH 6.2 using ampicillin 100 mg/l and zeatin 1 mg/l: 466.7 ± 153.2 PCs/100 buds. A new source material for breeding – doubled haploid lines of cabbage was received. Lines – the best parents for F1 hybrids with high yield, compact rosette of leaves, with optimum inside and short outside cabbage stump was created. Studies have shown that optimization of breeding process in case of creation of pure lines of cabbage in 3 years with microspore culture requires to reduce the breeding process in 2 times.

scholarly journals DIALLEL ANALYSIS OF TOLERANCE TO DROUGHT IN COWPEA GENOTYPES

2018 ◽  
Vol 31 (1) ◽  
pp. 40-47 ◽  
Author(s):  
ERINA VITÓRIO RODRIGUES ◽  
KAESEL JACKSON DAMASCENO-SILVA ◽  
MAURISRAEL DE MOURA ROCHA ◽  
EDSON ALVES BASTOS ◽  
ADRIANO DOS SANTOS
Keyword(s):  
Water Deficit ◽  
Recurrent Selection ◽  
Diallel Analysis ◽  
Diallel Cross ◽  
Limiting Factors ◽  
Additive Effects ◽  
Negative Effects ◽  
Complete Diallel Cross ◽  
Brazilian Northeast ◽  
Block Experiment

ABSTRACT The low use of technologies by farmers and the occurrence of biotic and abiotic stresses are limiting factors for cowpea production in the Brazilian Northeast region. The tolerance of genotypes to drought is an alternative to decrease the negative effects of stresses on cowpea production. Thus, the objective of this work was to identify parents and combinations of cowpea genotypes with high probability of generating segregating populations with tolerance to drought. Six cowpea genotypes were crossed in a complete diallel cross design, totaling 30 F2 populations, which were evaluated together with their parents in an experiment under water deficit at the experimental field of the Embrapa Mid-North, Teresina, State of Piauí, Brazil. A triple lattice incomplete block experiment design was used, with three replications, with experimental plot consisting of six 2-m plant rows. Fifteen plants per plot were sampled to evaluate their agronomic characteristics, whose results were subjected to analysis of variance and means were used to estimate the general and specific combining abilities. The genotypes showed significant differences in all characteristics evaluated, denoting the genetic variability of the population. The additive effects were more important than the non-additive effects, and maternal inheritance was detected. The genotypes BRS Xiquexique, Pingo-de-Ouro-1-2 and MNC99-510F-16-1 were the most promising for use in recurrent selection programs for tolerance to water deficit. The hybrid combinations (1) BRS Paraguaçu X (4) CNCx-698-128G, (2) Pingo-de-Ouro-1-2 X (3) BRS Xiquexique, (3) BRS Xiquexique X (5) Santo-Inácio, (4) CNCx-698-128G X (6) MNC99-510F-16-1 and (5) Santo-Inácio X (4) CNCx-698-128G showed potential for generating superior lineages regarding bean production and tolerance to water deficit.

Analysis of genetic effects on a complete diallel cross test of Betula platyphylla

Euphytica ◽  
2014 ◽  
Vol 200 (2) ◽  
pp. 221-229 ◽  
Author(s):  
Xiyang Zhao ◽  
Xiuyan Bian ◽  
Mengran Liu ◽  
Zhixin Li ◽  
Ying Li ◽  
...  
Keyword(s):  
Diallel Cross ◽  
Genetic Effects ◽  
Betula Platyphylla ◽  
Complete Diallel Cross ◽  
Cross Test

scholarly journals Weight and morphometric growth of Pacu (Piaractus mesopotamicus), Tambaqui (Colossoma macropumum) and their hybrids from spring to winter

2018 ◽  
Vol 38 (3) ◽  
pp. 544-550 ◽  
Author(s):  
Natália M.N. Mourad ◽  
Adriano C. Costa ◽  
Rilke T.F. Freitas ◽  
Moacyr A. Serafini ◽  
Rafael V. Reis Neto ◽  
...  
Keyword(s):  
Body Weight ◽  
Body Height ◽  
Diallel Cross ◽  
Logistic Function ◽  
Head Length ◽  
Body Width ◽  
Genetic Groups ◽  
Significant Difference ◽  
Complete Diallel Cross ◽  
Morphometric Evaluation

ABSTRACT: This study aimed to evaluate weight and morphometric growth of the products of the complete diallel cross-breeding between pacu and tambaqui during the period from the end of spring to the beginning of winter. Was used 400 pacu, tambaqui, tambacu and paqui. 20 fish from each group were collected, weighed and submitted to morphometric evaluation every 28 days. The Logistic function adjusted better to describe the growth in body weight and the morphometric measures for age on all the genetic groups. The studied groups presented similar behavior of growth for body weight and morphometric measures. There were significant differences between the genetic groups regarding parameters A (asymptotic value) and B (integration constant) for body weight and for all the morphometric measures evaluated. For the parameter K (maturity rate), there were significant difference between groups for body weight, head length and body height. The groups possibly were affected the decrease of temperature. The Tambacu was superior to the Paqui in all the variables evaluated for the parameter A, and was also superior to the pure breed, except for head length and body width.

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