scholarly journals Evaluación de diversos patrones heteróticos en la formación de híbridos de maíz para el bajío mexicano.

2006 ◽  
Vol 10 (2) ◽  
pp. 31
Author(s):  
Humberto De León ◽  
Ernestor Ramírez ◽  
Gaspar Martínez ◽  
Arnoldo Oyervides ◽  
Alfredo De la Rosa
Keyword(s):  
Genetic Variance ◽  
Gene Action ◽  
Genetic Characterization ◽  
Agronomic Traits ◽  
Genetic Material ◽  
Breeding Strategy ◽  
Summer Season ◽  
Heterotic Groups ◽  
Made In

This research was carried out to evaluate and characterize several heterotic patterns as a breeding strategy for developing hybrids for the Bajio region in Mexico. It was based on the performance of the crosses made, in the estimation of the type of gene action within each heterotic pattern, and the proportion of high yielding hybrids for intermediate or middle-altitude regions of Mexico. The genetic material evaluated included three heterotic groups: Tropical x Bajio (TxB); Dwarf x Normal (DxN), and Early x Late (ExL), with 20 hybrids each one and two commercial controls recommended for the region. Hybrids were developed using a nested mating design, where each of five males was crossed with four females. Hybrids were considered as full-sibs, and then, utilized for the genetic characterization of the groups or heterotic patterns. Data were recorded for ear yield at 15,5% moisture content, days to anthesis, days to silking and plant height. Hybrid evaluation was conducted in two representative locations of middle-altitude (1100 to 1900 masl) regions during the spring-summer season of 1995 at Celaya, Gto.and Sandia el Grande, N.L. Results showed that the ExL pattern produced hybrids having the best agronomic traits and the highest genetic variance. Due to the intrinsic asynchrony difficulties it was concluded that the DxL pattern was the best strategy for developing hybrids for the middlealtitude regions of Mexico.

scholarly journals Phenotypic and genetic characterization of tomato mutants provides new insights into leaf development and its relationship to agronomic traits

2019 ◽  
Vol 19 (1) ◽  
Author(s):  
Marybel Jáquez-Gutiérrez ◽  
Alejandro Atarés ◽  
Benito Pineda ◽  
Pilar Angarita ◽  
Carlos Ribelles ◽  
...  
Keyword(s):  
Leaf Development ◽  
Genetic Characterization ◽  
Agronomic Traits ◽  
Phenotypic And Genetic Characterization

scholarly journals Deep Phenotyping and Genetic Characterization of a Cohort of 70 Individuals With 5p Minus Syndrome

2021 ◽  
Vol 12 ◽  
Author(s):  
Julián Nevado ◽  
Cristina Bel-Fenellós ◽  
Ana Karen Sandoval-Talamantes ◽  
Adolfo Hernández ◽  
Chantal Biencinto-López ◽  
...  
Keyword(s):  
Genetic Characterization ◽  
Neurodevelopmental Disorder ◽  
Genetic Material ◽  
Distal Region ◽  
Global Developmental Delay ◽  
Molecular Heterogeneity ◽  
Functional Differences ◽  
Chromosome 5P ◽  
Deep Phenotyping

Chromosome-5p minus syndrome (5p-Sd, OMIM #123450) formerly known as Cri du Chat syndrome results from the loss of genetic material at the distal region of the short arm of chromosome 5. It is a neurodevelopmental disorder of genetic cause. So far, about 400 patients have been reported worldwide. Individuals affected by this syndrome have large phenotypic heterogeneity. However, a specific phenotype has emerged including global developmental delay, microcephaly, delayed speech, some dysmorphic features, and a characteristic and monochromatic high-pitch voice, resembling a cat’s cry. We here describe a cohort of 70 patients with clinical features of 5p- Sd characterized by means of deep phenotyping, SNP arrays, and other genetic approaches. Individuals have a great clinical and molecular heterogeneity, which can be partially explained by the existence of additional significant genomic rearrangements in around 39% of cases. Thus, our data showed significant statistical differences between subpopulations (simple 5p deletions versus 5p deletions plus additional rearrangements) of the cohort. We also determined significant “functional” differences between male and female individuals.

Population and quantitative genomic properties of the USDA soybean germplasm collection

2018 ◽  
Vol 16 (6) ◽  
pp. 513-523 ◽  
Author(s):  
Alencar Xavier ◽  
Rima Thapa ◽  
William M. Muir ◽  
Katy Martin Rainey
Keyword(s):  
Genetic Resources ◽  
Agronomic Traits ◽  
Snp Array ◽  
Genetic Material ◽  
Germplasm Collection ◽  
Effective Population ◽  
Department Of Agriculture ◽  
Soybean Germplasm ◽  
National Plant Germplasm System

AbstractThis study is the first assessment of the entire soybean [Glycine max (L.) Merr] collection of the United State Department of Agriculture National Plant Germplasm System (USDA) reporting quantitative and population genomic parameters. It also provides a new insight into soybean germplasm structure. Germplasm studies enable plant breeders to incorporate novel genetic resources into breeding pipelines to improve valuable agronomic traits. We conducted comprehensive analyses on the 19,652 soybean accessions in the USDA-ARS germplasm collection, genotyped with the SoySNP50 K iSelect BeadChip SNP array, to elucidate the quantitative properties of existing subpopulations inferred through hierarchical clustering performed with Ward's D agglomeration method and Nei's standard genetic distance. We found the effective population size to be approximately 106 individuals based on the linkage disequilibrium of unlinked loci. The cladogram indicated the existence of eight major clusters. Each cluster displays particular properties with regard to major quantitative traits. Among those, cluster 3 represents the tropical and semi-tropical genetic material, cluster 5 displays large seeds and may represent food-grade germplasm, and cluster 7 represents the undomesticated material in the germplasm collection. The average FST among clusters was 0.22 and a total of 914 SNPs were exclusive to specific clusters. Our classification and characterization of the germplasm collection into major clusters provides valuable information about the genetic resources available to soybean breeders and researchers.

scholarly journals Genetic Characterization of Domesticated F1 Generation in Humpback Grouper (Cromileptes altivelis)

2007 ◽  
Vol 5 (1) ◽  
pp. 87
Author(s):  
Ratu Siti Aliah ◽  
. Wahidah ◽  
K. Sumantadinata ◽  
Estu Nugroho ◽  
O. Carman
Keyword(s):  
First Generation ◽  
Genetic Characterization ◽  
Haplotype Diversity ◽  
Breeding Strategy ◽  
Loop Region ◽  
Pcr Rflp ◽  
D Loop ◽  
F1 Generation ◽  
Mtdna Haplotype

<p>First generation (F1) of hatchery produced humpback grouper (<em>Cromileptes altivelis</em>) has been characterized genetically in order to serve the information of their status in related to their breeding strategy. PCR-RFLP method was used to detect the variation of mtDNA D-loop region of F1 population at BBPBL Lampung and BBAP Situbondo. The result of study showed that reducing of haplotype diversity had been arised from broodstock (0.8548) to F1 generation population (0.7473; 0.7273; and 0.6947, respectively).  Genetic divergence that had found between population BBPBL Lampung and BBAP Situbondo make it possible to do outbreeding in order to get its heterosis's effect.</p> <p>Keywords: mtDNA, haplotype diversity, genetic differentiation, <em>Cromileptes altivelis</em></p> <p> </p> <p>ABSTRAK</p> <p>Ikan kerapu tikus (<em>Cromileptes altivelis</em>) generasi pertama (F1) hasil domestikasi di hatchery telah dikarakterisasi secara genetik untuk menyediakan informasi status sehubungan dengan program pemuliaannya.  Metode PCR-RFLP digunakan untuk mendeteksi variasi sekuens D-loop mtDNA ikan kerapu tikus F1 yang diproduksi di BBPBL Lampung dan BBAP Situbondo.  Hasil penelitian menunjukkan bahwa telah terjadi penurunan keragaman haplotipe dari induk (0,8548) ke populasi generasi F1 (masing-masing 0,7473; 0,7273; dan 0,6947).  Adanya keragaman genetik antara populasi ikan kerapu tikus di BBPBL dan BBAP Situbondo memungkinkan dilakukannya <em>outbreeding</em> untuk mendapatkan efek heterosis.</p> <p>Kata kunci: mtDNA, keragaman haplotipe, diferensiasi genetik, <em>Cromileptes altivelis</em></p>

Genetic characterization of agronomic traits and grain threshability for organic naked barley in the Northern U.S

Crop Science ◽  
2021 ◽  
Author(s):  
Chris Massman ◽  
Brigid Meints ◽  
Javier Hernandez ◽  
Karl Kunze ◽  
Patrick Hayes ◽  
...  
Keyword(s):  
Genetic Characterization ◽  
Agronomic Traits ◽  
Naked Barley

HETEROSIS AND COMBINING ABILITY OF BARLEY HYBRIDS IN DENSELY AND WIDELY SEEDED CONDITIONS

1971 ◽  
Vol 51 (2) ◽  
pp. 115-122 ◽  
Author(s):  
T. C. YAP ◽  
B. L. HARVEY
Keyword(s):  
Combining Ability ◽  
Genetic Variance ◽  
Gene Action ◽  
Agronomic Traits ◽  
Unit Area ◽  
Heading Date ◽  
General Combining Ability ◽  
Hordeum Vulgare L ◽  
Additive Gene Action ◽  
Additive Gene

All possible crosses were made among the four commercial barley (Hordeum vulgare L. emend. Lam.) cultivars, ’Conquest’, ’Gait’, ’Jubilee’ and ’Olli’, and evaluated under space-seeded (12 seeds/3.66 m × 0.61 m) and densely seeded (250 seeds/4.88 m × 0.15 m) conditions. For the six agronomic traits measured, no substantial heterosis was found. The number of heads per unit area was consistently correlated with grain yields. Heading date and plant height showed similar trends in both tests, whereas grain yield and the components of yield showed different behavior in the two tests. The major portion of the genetic variance for the traits measured was due to variation in general combining ability, indicating that additive gene action was more important than non-additive gene action. Moreover, general combining ability effects were less susceptible to environment than the specific combining ability effects.

scholarly journals Genetic analysis of grain yield and agronomic traits of early provitamin A quality protein maize inbred lines in contrasting environments

2019 ◽  
Vol 157 (5) ◽  
pp. 413-433 ◽  
Author(s):  
E. Obeng-Bio ◽  
B. Badu-Apraku ◽  
B. E. Ifie ◽  
A. Danquah ◽  
E. T. Blay ◽  
...  
Keyword(s):  
Grain Yield ◽  
Gene Action ◽  
Agronomic Traits ◽  
Inbred Lines ◽  
Sub Saharan Africa ◽  
Provitamin A ◽  
Heterotic Group ◽  
Quality Protein Maize ◽  
Heterotic Groups ◽  
Early Maturing

AbstractEarly-maturing provitamin A (PVA) quality protein maize (QPM) hybrids with combined drought and low soil nitrogen (low-N) tolerance are needed to address malnutrition and food security problems in sub-Saharan Africa (SSA). The current study's objectives were to (i) examine combining ability of selected early maturing PVA-QPM inbreds for grain yield and other agronomic traits under drought, low-N, optimal environments and across environments, (ii) determine gene action conditioning PVA accumulation under optimal environments, (iii) classify inbreds into heterotic groups and identify testers and (iv) assess yield and stability of hybrids across environments. Ninety-six hybrids generated from 24 inbred lines using the North Carolina Design II together with four commercial hybrid controls were evaluated under drought, low-N and optimal environments in Nigeria in 2016 and 2017. Fifty-four selected hybrids were assayed for PVA carotenoid and tryptophan content. Additive genetic effects were greater than non-additive effects for grain yield and most agronomic traits under each and across environments. The gene action conditioning accumulation of PVA carotenoids under optimal growing conditions followed a pattern similar to that of grain yield and other yield-related traits. The inbred lines were categorized into four heterotic groups consistent with the pedigree records and with TZEIORQ 29 identified as the best male and female tester for heterotic group IV. No tester was found for the other groups. Hybrid TZEIORQ 24 × TZEIORQ 41 was the highest yielding and most stable across environments and should be further tested for consistent performance for commercialization in SSA.

Histopathological and genetic characterization of colorectal mucinous carcinoma

2001 ◽  
Vol 120 (5) ◽  
pp. A166-A166
Author(s):  
S FUJII ◽  
T KUSAKA ◽  
T KAIHARA ◽  
Y UEDA ◽  
T CHIBA ◽  
...  
Keyword(s):  
Genetic Characterization ◽  
Mucinous Carcinoma
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