Studies of genetic parameters for productive traits in early maturing sugarcane clones and selection of superior clones

The present studies were carried out to characterize seventy-one aromatic rice germplasm from IGKV, Raipur. These germplasm were characterized and grouped on the basis of anthocyanin pigmentation, plant habit, and awning character. On the basis of pigmentation distribution in 10 plant parts, a total of twelve groups were formed with group one having no pigmentation and group twelve with pigmentation in 9 plant parts. On the basis of plant habit and awning character, three groups of each were formed. The genetic parameters for the ten agronomic traits indicated that the selection of genotypes may be done for fertile spikelets per panicle, spikelet density, spikelet sterility percentage, and hundred seed weight. Thus, on the basis of above characters, the genotypes Tulsi Mala, Baanspati, Ganga Balu, Samund Chini, Tulsi Amrit, Dudh Dhan, Kari Gilas, Shankar Jeera, and Jata Shankar may be selected for future study. DOI: http://dx.doi.org/10.3329/bjar.v37i1.11168 Bangladesh J. Agril. Res. 37(1): 1-8, March 2012

Download Full-text

Selection of cotton lines for high oil content

Pesquisa Agropecuária Brasileira ◽

10.1590/s0100-204x2017000700007 ◽

2017 ◽

Vol 52 (7) ◽

pp. 530-538 ◽

Cited By ~ 3

Author(s):

Luiz Paulo de Carvalho ◽

Josiane Isabela da Silva Rodrigues ◽

Francisco José Correia Farias

Keyword(s):

Oil Content ◽

Genetic Parameters ◽

Fiber Quality ◽

Rio Grande ◽

Field Trials ◽

The State ◽

The Other ◽

Expected Gain ◽

High Heritability ◽

Selection Of

Abstract: The objective of this work was to evaluate the oil content and characters related to fiber quality and yield in cotton lines (Gossypium hirsutum), in order to select genotypes with high oil content and acceptable levels of the other characters. Twenty-two F6 lines and three checks were cultivated in three field trials - two in the municipality of Apodi, in the state of Rio Grande do Norte, and one in the municipality of Barbalha, in the state of Ceará, both in Brazil. The genetic parameters and the genetic gain from selecting 20% of the lines were estimated according to their means in each environment and in the group of environments. Regarding oil content, there is genetic variability, and the selection based on the overall mean is indicated, since this character showed high heritability, with 4.58% expected gain. The lines selected with this criterion have oil contents between 23.52 and 24.51%, which are higher than those of the Brazilian cultivar BRS Aroeira with the highest grain oil content (22.04%).

Download Full-text

Selection for rate and efficiency of lean gain in Hereford cattle 1. Selection pressure applied and direct responses

Animal Science ◽

10.1017/s0003356100005122 ◽

1990 ◽

Vol 51 (1) ◽

pp. 23-34 ◽

Cited By ~ 21

Author(s):

R. A. Mrode ◽

C. Smith ◽

R. Thompson

Keyword(s):

Genetic Parameters ◽

Control Line ◽

Correlated Responses ◽

Direct Response ◽

Lean Growth ◽

Hereford Cattle ◽

Frozen Semen ◽

Phenotypic Standard Deviation ◽

Selection For ◽

Selection Of

ABSTRACTSelection of bulls for rate and efficiency of lean gain was studied in a herd of Hereford cattle. There were two selection lines, one selected for lean growth rate (LGR) from birth to 400 days and the other for lean food conversion ratio (LFCR) from 200 to 400 days of age, for a period of 8 years. A control line bred by frozen semen from foundation bulls was also maintained. Generation interval was about 2·4 years and average male selection differentials, per generation were 1·2 and — 1·1 phenotypic standard deviation units for LGR and LFCR respectively.Genetic parameters and responses to selection were estimated from the deviation of the selected lines from a control line and by restricted maximum likelihood (REML) techniques on the same material. Realized heritabilities were 0·40 (s.e. 0·12) for LGR and 0·40 (s.e. 0·13) for LFCR using the control line. Corresponding estimates from REML were 0·42 (s.e. 0·10) and 0·37 (s.e. 0·14). The estimate of the genetic correlation between LGR and LFCR was about — 0·69 (s.e. 0·12) using REML.The estimates of direct annual genetic change using deviations from the control were 3·6 (s.e. 1·3) g/day for LGR and — 0·14 (s.e. 0·07) kg food per kg lean gain for LFCR. Corrsponding estimates from REML were similar but more precisely estimated. The correlated responses for LFCR in the LGR line was higher than the direct response for LFCR.

Download Full-text

Genetic parameters and estimated genetic gains in young rubber tree progenies

Pesquisa Agropecuária Brasileira ◽

10.1590/s0100-204x2013000400009 ◽

2013 ◽

Vol 48 (4) ◽

pp. 411-416 ◽

Cited By ~ 4

Author(s):

Cecília Khusala Verardi ◽

Erivaldo José Scaloppi Junior ◽

Guilherme Augusto Peres Silva ◽

Lígia Regina Lima Gouvêa ◽

Paulo de Souza Gonçalves

Keyword(s):

Genetic Gain ◽

Genetic Parameters ◽

Block Design ◽

Rubber Tree ◽

First Year ◽

Genetic Gains ◽

Selection Gain ◽

Randomized Block Design ◽

Using Data ◽

Selection Of

The objective of this work was to assess the genetic parameters and to estimate genetic gains in young rubber tree progenies. The experiments were carried out during three years, in a randomized block design, with six replicates and ten plants per plot, in three representative Hevea crop regions of the state of São Paulo, Brazil. Twenty-two progenies were evaluated, from three to five years old, for rubber yield and annual girth growth. Genetic gain was estimated with the multi-effect index (MEI). Selection by progenies means provided greater estimated genetic gain than selection based on individuals, since heritability values of progeny means were greater than the ones of individual heritability, for both evaluated variables, in all the assessment years. The selection of the three best progenies for rubber yield provided a selection gain of 1.28 g per plant. The genetic gains estimated with MEI using data from early assessments (from 3 to 5-year-old) were generally high for annual girth growth and rubber yield. The high genetic gains for annual girth growth in the first year of assessment indicate that progenies can be selected at the beginning of the breeding program. Population effective size was consistent with the three progenies selected, showing that they were not related and that the population genetic variability is ensured. Early selection with the genetic gains estimated by MEI can be made on rubber tree progenies.

Download Full-text

Selection gains for the palm oil production from progenies of American oil palm with oil palm

Pesquisa Agropecuária Brasileira ◽

10.1590/s1678-3921.pab2021.v56.02321 ◽

2021 ◽

Vol 56 ◽

Author(s):

Rui Alberto Gomes Junior ◽

Alessandra Ferraiolo de Freitas ◽

Raimundo Nonato Vieira da Cunha ◽

Antônio José de Abreu Pina ◽

Higo Otávio Brochado Campos ◽

...

Keyword(s):

Palm Oil ◽

Oil Palm ◽

Genetic Parameters ◽

Recurrent Selection ◽

Oil Production ◽

Reciprocal Recurrent Selection ◽

Fresh Fruit Bunches ◽

Favorable Conditions ◽

Selection Of

Abstract The objective of this work was to estimate the genetic parameters, correlations, and selection gains for the oil production of interspecific hybrids progenies between American oil palm, of ‘Manicoré’ origin, and oil palm, of ‘La Mé’ origin. Thirty-nine progenies were evaluated from the sixth to the ninth year after planting, for the productivity of fresh fruit bunches (PROD_FFB), oil content in the bunch (OCB), and palm oil productivity (PROD_OP). The genetic parameters and gains from direct (GDS) and indirect (GIS) selection were estimated for PROD_OP. High values of heritability for the CVg/CVe ratio indicated favorable conditions for the selection. With the selection of 20% of the progenies (selection in both sexes), the following estimates were obtained: 11.15% GDS for PROD_OP, 9.1% GIS for OCB, and 8.1% GIS for PROD_FFB. The PROD_OP of the progenies was of 6,175, 6,057, and 5,995 kg ha-1 per year with GDS and GIS for OCB and PROD_FFB, respectively. The restricted selection of the LM2T male genitor offspring resulted in 5.1% estimated GSD and in a mean of 5,800 kg ha-1 per year for PROD_OP. Selection gains for PROD_OP can be achieved immediately through the selection restricted to oil palm male genitors, and, in the medium and long term, through the interspecific reciprocal recurrent selection between American oil palm and oil palm populations.

Download Full-text

Plant selection in F2 segregating populations of papaya from commercial hybrids

Cropp Breeding and Applied Biotechnology ◽

10.1590/s1984-70332012000300005 ◽

2012 ◽

Vol 12 (3) ◽

pp. 191-198 ◽

Cited By ~ 20

Author(s):

Eder Jorge Oliveira ◽

Gilberto de Andrade Fraife Filho ◽

Juan Paulo Xavier de Freitas ◽

Jorge Luiz Loyola Dantas ◽

Marcos Deon Vilela de Resende

Keyword(s):

Genetic Parameters ◽

Mixed Model ◽

Soluble Solids ◽

Fruit Firmness ◽

Plant Selection ◽

F2 Population ◽

The Common ◽

Mixed Model Methodology ◽

Fruit Diameter ◽

Selection Of

The objective of this paper was to estimate the genetic parameters and additive genetic values in segregating populations of papaya using the mixed model methodology. Two F2 populations from Tainung and Calimosa hybrids were evaluated. The experimental design was an augmented block with four replicates, and Golden and Calimosa cultivars were the common treatment. Estimates of individual heritability were high for fruit length (FL) and weight (FW), moderate for fruit diameter (FD), and low for total soluble solids (TSS) and fruit firmness (FF). Considering FF and TSS as main traits for selection, genotypes of Calimosa-F2 population showed better performance to FF, but worse concerning TSS. It was selected 18.3% and 24.6% of plants from Tainung-F2 and Calimosa-F2 populations, respectively. Negative correlation between TSS and FF was not able to reduce the genetic gains. The segregating populations from Calimosa hybrid are more promising for the selection of papaya lines.

Download Full-text

Assessment of genetic diversity and estimation of genetic parameters for remobilization related traits of wheat under drought conditions

Genetika ◽

10.2298/gensr1601139f ◽

2016 ◽

Vol 48 (1) ◽

pp. 139-149

Author(s):

Ezatollah Farshadfar ◽

Reza Amiri

Keyword(s):

Dry Matter ◽

Genetic Parameters ◽

Predominant Role ◽

Genetic Potential ◽

Cropping Season ◽

Additive Gene ◽

Genetic Techniques ◽

Selection Of ◽

Kernel Yield

In order to evaluate genetic variability and estimation of remobilization related traits in wheat using biometrical genetic techniques an experiment was conducted in a randomized complete blocks design with three replicates under post-anthesis drought stress conditions in the Campus of Agriculture and Natural Resources, Razi University, Kermanshah, Iran during 2011-2012 cropping season. The results of analysis of variance showed significant differences between the genotypes for all studied traits except current photosynthesis (CP) and current photosynthesis share into kernel yield (CPSKY). High genetic gain and broad sense heritability estimates were observed for penultimate remobilization share into kernel yield (PenRSKY) and internodes remobilization share into kernel yield (IRSKY) indicating high genetic potential, low effect of environment and predominant role of additive gene effect on their expression. Spike dry matter remobilization (SDMR), spike dry matter remobilization efficiency (SDMRE) and spike remobilization share into kernel yield (SRSKY) exhibited the highest phenotypic and genetic positive correlation with kernel yield (KY). Moreover, the highest genotypic and phenotypic covariance was observed between kernel yield (KY) and SDMR, CP, SDMRE and SRSKY, respectively. The highest environmental covariance was identified between kernel yield (KY), peduncle dry matter remobilization (PedDMR) and penultimate dry matter remobilization (PenDMR), respectively. High co-heritability was detected between SDMRE and PedDMR, PedDMRE and PenDMR and between peduncle remobilization share into kernel yield (PedRSKY) and internodes dry matter remobilization efficiency (IDMRE), suggesting that selection of either of the traits would simultaneously affect the others, positively.

Download Full-text

Selection of a suitable data set and model for the genetic evaluation of the linear description of conformation and type description in Old Kladruber horses

Archives Animal Breeding ◽

10.5194/aab-55-105-2012 ◽

2012 ◽

Vol 55 (2) ◽

pp. 105-112

Author(s):

L. Vostrý ◽

K. Mach ◽

J. Přibyl

Keyword(s):

Random Effects ◽

Fixed Effects ◽

Genetic Parameters ◽

Suitable Model ◽

Residual Variance ◽

Linear Type ◽

Colour Variant ◽

Repeated Evaluation ◽

Estimation Of Genetic Parameters ◽

Selection Of

Abstract. The objective of this paper was to select a suitable data subset and statistical model for the estimation of genetic parameters for 36 traits of the linear type in 977 Old Kladruber horses. Two subsets were tested to identify a suitable subset for analysis. One subset included repeated evaluation of certain individuals, whereas the other did not. The most suitable subset included repeated evaluation (n=1 390). The selection of a suitable model was made from 4 candidate models. These models comprised a number of random effects (direct individual effect and animal permanent environmental effect of the animal) and a number of fixed effects (colour variant, stud, colour variant × stud interaction, sex, age at description, year of birth, year of description). The model was selected based on the Akaike information criterion (AIC, Akaike 1974), residual variance and heritability coefficient. The model that included colour variant, stud, colour variant × stud interaction, sex, age at description, and year of description as fixed effects and direct individual and animal permanent environment as random effects was the most suitable model for the estimation of genetic parameters and for the subsequent estimation of breeding values.

Download Full-text

Estimation of Genetic Parameters for Body Weight and Some Colour Traits in the Seventh-generation Index Selected Nigeria Heavy Local Chicken Ecotype

Agricultural Science Digest - A Research Journal ◽

10.18805/ag.d-359 ◽

2021 ◽

Author(s):

I.J. Ohagenyi ◽

F.C. Iregbu ◽

V.C. Udeh

Keyword(s):

Body Weight ◽

Genetic Parameters ◽

Genetic Correlations ◽

The Body ◽

Pedigree Selection ◽

Egg Colour ◽

Local Chicken ◽

Range Test ◽

Estimation Of Genetic Parameters ◽

Selection Of

Background: This study was conducted to estimate the genetic parameters of body weight and some colour traits in seventh generation (G7) index selected Nigerian Heavy Local Chicken Ecotype (NHLCE) progenies at point of lay to 12 weeks. Methods: 5 sires and 12 hens were used to generate the progenies used for the experiment. Traits measured included weekly body weight, egg colour, beak colour and feather colour. Data collected were subjected to one way analysis of variance in a Paternal half sib analysis using Animal model of SAS (2003). Four weeks body weight measurements, egg colour, beak colour and feather colour for 5 sires ranged from 1.29±0.05 1.54±0.07; 2.55±0.02 to 4.00±0.02; 2.45±0.02 to 4.83±0.02 and 1.73±0.02 to 4.58±0.04 respectively. Result: The new Duncan’s multiple range test shows that sire families are similar (p greater than 0.05) in the body weight and beak colour, but significantly differed (p greater than 0.05) in the egg colour and feather colour. The heritability estimates of mature body weight for week 3 was medium, while estimates of heritability for weekly mature body weight for weeks 1, 2 and 4, egg colour, beak colour and feather colour of NHLCE were low heritability. Low h2 of traits suggest that progeny and pedigree selection could be employed for improvement of the egg colour, beak colour and feather colour of NHLCE. The study showed positive genetic correlations between beak colour and egg colour, negative genetic correlations between beak and feather colour. This means that no decision can be taken in isolation as the selection of one trait will have consequences on other traits.

Download Full-text