scholarly journals ESTIMATION OF SOME GENETIC PARAMETERS AFFECTING POTATO BREEDING PROGRAMS

2013 ◽  
Vol 4 (3) ◽  
pp. 383-399
Author(s):  
S. Moussa
Keyword(s):  
Genetic Parameters ◽  
Potato Breeding ◽  
Breeding Programs

scholarly journals Genetic Variability, Correlation among Agronomic Traits, and Genetic Progress in a Sugarcane Diversity Panel

Agriculture ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 533
Author(s):  
Fernanda Zatti Barreto ◽  
Thiago Willian Almeida Balsalobre ◽  
Roberto Giacomini Chapola ◽  
Antonio Augusto Franco Garcia ◽  
Anete Pereira Souza ◽  
...  
Keyword(s):  
Genetic Parameters ◽  
Mixed Model ◽  
Agronomic Traits ◽  
Average Increase ◽  
Genetic Progress ◽  
Breeding Programs ◽  
Future Studies ◽  
Diversity Panel ◽  
Adjusted Means ◽  
Historical Series

Sugarcane breeding programs require 15 years of experimentation to create more productive cultivars, and estimates of genetic progress can indicate the efficiency of breeding programs. In this study, we used a diversity panel, the Brazilian Panel of Sugarcane Genotypes (BPSG), with the following objectives: (i) to estimate, through a mixed model, the adjusted means and genetic parameters of ten traits evaluated over three harvest years; (ii) to estimate genotypic correlation among those traits; and (iii) to estimate genetic progress over six decades of breeding. The heritabilities ranged from 0.43 to 0.88, and we detected 42 significant correlations, 9 negative and 33 positive. Over six decades, the sucrose-related traits BRIX, POL%C, and POL%J showed an average increase per decade of 0.27 °Brix (0.26% and 0.31%, respectively). Stalk number, height, and weight of the plot, and cane and sucrose yields revealed average increases per decade of 3.27 stalks, 0.06 m, 9.42 kg, 11.22 t/ha, and 2.08 t/ha, respectively. The genetic progress of the main agronomic traits is discussed through a historical series of sugarcane genotypes present in the BPSG. The findings of this study could contribute to the management of new breeding strategies and allow for future studies of associative mapping.

Glycoalkaloid composition of wild and cultivated tuber-bearing Solanum species of potential value in potato breeding programs

1978 ◽  
Vol 26 (5) ◽  
pp. 1246-1248 ◽  
Author(s):  
Stanley F. Osman ◽  
Samuel F. Herb ◽  
Thomas J. Fitzpatrick ◽  
P. Schmiediche
Keyword(s):  
Potato Breeding ◽  
Solanum Species ◽  
Breeding Programs ◽  
Potential Value

scholarly journals Morpho-agronomic characterization and estimates of genetic parameters in annatto plant

2017 ◽  
Vol 35 (2) ◽  
pp. 242-246 ◽  
Author(s):  
Nilma O Dias ◽  
Tiyoko NH Rebouças ◽  
Abel R São José ◽  
Cláudio LF Amaral
Keyword(s):  
Genetic Parameters ◽  
Environmental Influence ◽  
Genotypic Variation ◽  
Morphological Characterization ◽  
Breeding Programs ◽  
Tropical America ◽  
Self Fertilization ◽  
Superior Genotypes ◽  
Increasing Demand

ABSTRACT Originally from tropical America, annatto is an important source of natural dyes for food, pharmaceutical and textile industries, especially for the increasing demand of this pigment substituting artificial dyes. The aim of this study was to evaluate genotypic variation of annatto cultivar Embrapa 37, aiming to generate subsidies for breeding programs as well as to help out the producers using vegetative propagation of superior genotypes. Therefore, the morphological characterization was carried out and estimates of genetic and phenotypic parameters, for production and quality of the fruits, were obtained. The results showed wide rate of genetic variability among the plants with low environmental influence on the phenotype for traits bixin content, fruit width, number of fruits per bunch and mass of 100 seeds. The authors concluded that superior genotypes can be selected through the parental performance and propagated vegetatively to form more profitable crops, as well as used in breeding programs through self-fertilization with analysis of resulting progeny.

scholarly journals Use of Quantitative PCR Diagnostics to Identify Tolerance and Resistance to Verticillium dahliae in Potato

Plant Disease ◽  
2001 ◽  
Vol 85 (7) ◽  
pp. 700-705 ◽  
Author(s):  
H. Dan ◽  
S. T. Ali-Khan ◽  
J. Robb
Keyword(s):  
Verticillium Dahliae ◽  
Potato Breeding ◽  
Resistance Breeding ◽  
Breeding Population ◽  
Average Amount ◽  
Breeding Programs ◽  
Polymerase Chain ◽  
Species Specific ◽  
Pcr Diagnostics ◽  
Accurate Quantification

A potato breeding population was evaluated for the presence of tolerance and resistance to Verticillium dahliae. Clones were ranked as susceptible or moderately and highly resistant based on symptom expression, and a species-specific polymerase chain reaction (PCR)-based assay was used to determine the Verticillium biomass in the bases of stems. A clone was designated as tolerant if the amount of fungus present in the host tissue was equal to or greater than the collective average amount for all clones in the symptom category above. Tolerant and resistant clones were identified in all trials, but the expression of tolerance was usually unstable across runs. The fungus was detected in some symptomless plants; on the other hand, some symptomatic plants were found to be pathogen-free. These observations emphasize the necessity of accurate quantification of the pathogen biomass in potato during Verticillium resistance breeding programs.

The genetic foundation of fitness and reproduction traits in Australian pig populations. 2. Relationships between weaning to conception interval, farrowing interval, stayability, and other common reproduction and production traits.

1996 ◽  
Vol 47 (8) ◽  
pp. 1275 ◽  
Author(s):  
E Tholen ◽  
KL Bunter ◽  
S Hermesch ◽  
HU Graser
Keyword(s):  
Genetic Parameters ◽  
Performance Test ◽  
Genetic Relationships ◽  
Average Daily Gain ◽  
Genetic Correlations ◽  
Data Sets ◽  
Production Traits ◽  
Breeding Programs ◽  
Reproduction Traits ◽  
Daily Gain

Data sets from 2 large Australian piggeries were used to estimate genetic parameters for the traits weaning to conception interval (WCIi-l,i) and farrowing interval (FIi-l,i), number born alive (NBAI), average piglet birthweight (BWi), 21-day litter weight (W21i), and sow stayability (STAYli) recorded for each ith parity, as well as sow average daily gain (ADG) and backfat (BF) recorded at the end of performance test. Over parities and herds, heritabilities for each trait were in the ranges: WCI/FI, 0.0-0.10; NBA, 0.09-0.16; BW, 0.11-0.35; W21, 0.12-0.23; STAYli, 0.02-0.09; ADG, 0.35-0.37; BF, 0.36-0.45. Genetic correlations between NBAl and NBA from later parities were significantly different from 1. In addition, in 1 herd negative genetic correlations (rg = -0.04 to -0.25) were found between sow stayability traits and NBA1, but not NBA recorded in later parities. Stayability was Unfavourably correlated with ADG and BF, and favourably correlated with WCI12. However, WCI12 was unfavourably correlated genetically with BF (rg = -0.24) but uncorrelated with ADG. Antagonistic relationships also existed between NBA and BW, NBA and W21, and BW and STAY. In addition to the traditional traits currently included in pig-breeding programs (e.g. ADG, BF, and NBA), traits such as WCI, BW, and STAY should also be considered as selection criteria to minimise the detrimental effects of antagonistic genetic relationships between traits.

A relational database system for potato breeding programs

2000 ◽  
Vol 77 (2) ◽  
pp. 95-101 ◽  
Author(s):  
J. G. Kozub ◽  
D. R. Lynch ◽  
G. C. Kozub ◽  
L. M. Kawchuk ◽  
D. K. Fujimoto
Keyword(s):  
Relational Database ◽  
Potato Breeding ◽  
Database System ◽  
Breeding Programs ◽  
Relational Database System

scholarly journals Estimates of genetic parameters of pigments and agronomic traits in green and purple lettuce

2019 ◽  
Vol 43 ◽  
Author(s):  
Alisson Henrique Gama de Oliveira ◽  
Gabriel Mascarenhas Maciel ◽  
Ana Carolina Silva Siquieroli ◽  
Ana Carolina Pires Jacinto ◽  
Aline José da Silveira ◽  
...  
Keyword(s):  
Genetic Parameters ◽  
Agronomic Traits ◽  
Characteristic Number ◽  
Gene Interactions ◽  
Anthocyanin Content ◽  
Breeding Programs ◽  
Oligogenic Inheritance ◽  
Number Of Leaves ◽  
Determining Factor ◽  
Desirable Trait

ABSTRACT Understanding genetics and the gene interactions involved in the expression of certain characteristics becomes a determining factor for better exploration of its use. The development of breeding programs that combine one or more desirable trait into a single cultivar is directly impacted by this lack of knowledge of the genetic bases involved. The objective of the present study was to estimate the genetic parameters involved in pigment expression and agronomic characteristics in lettuce. Parental evaluations of lettuce, P1 (green) and P2 (purple) parental generations, the segregating generations F1 and F2, and the backcrosses Bc1 and Bc2 originating from the UFU-Crespa199#1#1 x UFU-Albina#2 crossing were evaluated. The chlorophyll and anthocyanin contents, number of leaves and plant diameter were evaluated. The study was conducted by testing all generations and the estimates obtained by averages and variances. Indications of polygenic or oligogenic inheritance were verified by the characteristic number of leaves, plant diameter, and anthocyanin content. The complete and additive-dominant models satisfactorily explained the performance of the variables, except the anthocyanin content.

scholarly journals Heritability estimation in early generations of two-way crosses in soybean

Bragantia ◽  
2008 ◽  
Vol 67 (1) ◽  
pp. 101-108 ◽  
Author(s):  
Marcelo Marchi Costa ◽  
Antonio Orlando Di Mauro ◽  
Sandra Helena Unêda-Trevisoli ◽  
Nair Helena Castro Arriel ◽  
Ivana Marino Bárbaro ◽  
...  
Keyword(s):  
Genetic Parameters ◽  
Genetic Variance ◽  
Selection Process ◽  
Broad Sense ◽  
Selection Methods ◽  
Narrow Sense ◽  
Breeding Programs ◽  
Heritability Estimation ◽  
The Family ◽  
Simple Selection

The estimation of genetic parameters, especially in early generations, is very useful for directing the selection process in breeding programs. The present research was undertaken to estimate heritabilities in the broad sense, narrow sense and using parent-offspring regression in F3 soybean populations from six two-way crosses, originated from the Soybean Breeding Program of Faculdade de Ciências Agrárias e Veterinárias (UNESP), Jaboticabal campus. It was used the family design with common checks located ten plots apart. It was observed highly significant differences among families. The experimental coefficient of variation (CVe), the CVg/CVe ratio and the heritability showed wide variation among traits, being the highest values found for number of pods, number of seeds and grain yield, making evident the existence of variance to be exploited by breeding. The estimation of the heritability coefficients in the broad sense, narrow sense and by regression were close in most of the situations, showing that the largest part of genetic variance is of additive nature, in which simple selection methods can lead to satisfactory genetic gains.

Evaluation genetic parameters for weight at different ages in Baluchi breed of sheep

2003 ◽  
Vol 2003 ◽  
pp. 145-145
Author(s):  
M. Hosseinpour Mashhadi ◽  
F. Eftekhari Shahroudi ◽  
R. Valizadeh
Keyword(s):  
Birth Weight ◽  
Genetic Parameters ◽  
Genetic Effect ◽  
Additive Genetic Effect ◽  
Maternal Environment ◽  
Breeding Programs ◽  
Breeding Values ◽  
Genetic Potential ◽  
Different Ages ◽  
Maternal Genetic Effect

Improving breeding values and breeding programs should be done based on genetic potential. The range of additive direct heritability and maternal environment heritability for birth weight is about 0.07 to 0.22 and 0.1 to 0.33 respectively the range of these values for the following weights are 0.09- 0.58 and 0.01- 0.17. the objective of this study was to predict the direct additive genetic effect, maternal genetic effect and heritabilities of lamb weight traits in baluchi breed of sheep.

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