Heritability

Inheritance of parthenocarpy in summer squash (Cucurbita pepo L.)

C. B. de Menezes, Maluf, W. R., de Azevedo, S. M., Faria, M. V., Nascimento, I. R., Nogueira, D. W., Gomes, L. A. A., and Bearzoti, E., Inheritance of parthenocarpy in summer squash (Cucurbita pepo L.), vol. 4, pp. 39-46, 2005.

The inheritance of the tendency to set parthenocarpic fruit in the summer squash (Cucurbita pepo L.) line Whitaker was studied. Two parental lines, Whitaker (parthenocarpic) and Caserta (non-parthenocarpic), and the F1 and F2 generations and backcrosses to both parents were tested. The parthenocarpic tendency of individual plants was scored on a scale from 1 (non-parthenocarpic fruit) to 5 (parthenocarpic fruit). The Whitaker line produced parthenocarpic fruit and had a mean score of 4.2, whereas Caserta did not set parthenocarpic fruit and had a score of 1.55.

Morphological evolution and heritability estimates for some biometric traits in the Murgese horse breed

C. Dario, Carnicella, D., Dario, M., and Bufano, G., Morphological evolution and heritability estimates for some biometric traits in the Murgese horse breed, vol. 5, pp. 309-314, 2006.

A data set concerning 1,816 subjects entered in the Italian Horse Registry from 1925 to 2002 was analyzed to investigate the morphological evolution of the Murgese horse and to obtain useful elements to enhance breeding practices. Three basic body measurements (height at withers, chest girth, and cannon bone circumference) were considered for each subject. Heritabilities were calculated for each parameter to infer the growth and development traits of this breed.

Genetic correlation between heifer pregnancy and scrotal circumference measured at 15 and 18 months of age in Nellore cattle

J. P. Eler, Mattos, E. C., Mourão, G. B., Ferraz, J. B. S., and Balieiro, J. C. C., Genetic correlation between heifer pregnancy and scrotal circumference measured at 15 and 18 months of age in Nellore cattle, vol. 5, pp. 569-580, 2006.

Data of pregnancy diagnosis from 24,945 Nellore heifers, raised under tropical conditions in Brazil and exposed to breeding at about 14 months of age, were analyzed simultaneously with 13,742 (analysis 1), 36,091 (analysis 2), 8,405 (analysis 3), and 8,405 (analysis 4) scrotal circumference (SC) records of contemporary young bulls in order to estimate heritability (h2) for yearling heifer pregnancy (HP) and for SC measured at around 15 (SC15) and 18 (SC18) months of age and to estimate genetic correlation between HP and SC15 (SC18).

Estimation of genetic parameters and variance components for growth traits in Romosinuano cattle in the Colombian humid tropics

R. M. Sarmiento and Garcia, J. P., Estimation of genetic parameters and variance components for growth traits in Romosinuano cattle in the Colombian humid tropics, vol. 6, pp. 482-491, 2007.

(Co)variance components and genetic parameters were estimated for body weights of a Romosinuano herd located in Sinú Valley, Cordoba, Colombia. Restricted maximum likelihood methods were used with a univariate animal model for birth weight, weaning weight (270 days), 16-month weight (480 days), weaning daily gain, and post-weaning daily gain. Models included random animal direct and maternal genetic effects, maternal permanent environmental effect (c2), and sex-year-month of birth and age of dam, as fixed effects.

Selection and estimation of the heritability of sunflower (Helianthus annuus) pollen collection behavior in Apis mellifera colonies

M. Basualdo, Rodríguez, E. M., Bedascarrasbure, E., and De Jong, D., Selection and estimation of the heritability of sunflower (Helianthus annuus) pollen collection behavior in Apis mellifera colonies, vol. 6, pp. 374-381, 2007.

We selected honey bee colonies (Apis mellifera L.) with a high tendency to collect sunflower pollen and estimated the heritability of this trait. The percentage of sunflower pollen collected by 74 colonies was evaluated. Five colonies that collected the highest percentages of sunflower pollen were selected. Nineteen colonies headed by daughters of these selected queens were evaluated for this characteristic in comparison with 20 control (unselected) colonies.

A general review of competition genetic effects with an emphasis on swine breeding

C. Y. Chen, Johnson, R. K., Van Vleck, L. D., and Newman, S., A general review of competition genetic effects with an emphasis on swine breeding, vol. 6. pp. 594-606, 2007.

A review of previous studies is presented on estimates of genetic parameters and responses to selection with traditional breeding approaches, on correlations between agonistic behavior and growth performance, and on theoretical frameworks for selection incorporating interactions among individuals and on practical methods for incorporating competition effects in breeding programs.

Heritability estimates for carcass traits of cattle: a review

A. Ríos Utrera and Van Vleck, L. Dale, Heritability estimates for carcass traits of cattle: a review, vol. 3. pp. 380-394, 2004.

We present estimates of heritability for carcass traits of cattle published in the scientific literature. Seventy-two papers published from 1962 to 2004, which reported estimates of heritability for carcass traits, were reviewed. The unweighted means of estimates of heritability for 14 carcass traits by slaughter end point (age, weight, and fat depth) were calculated.

(Co)variance components, genetic parameters and annual trends for calf weights in a Brahman herd kept on floodable savanna

D. Plasse, Verde, O., Arango, J., Camaripano, L., Fossi, H., Romero, R., M., C. Rodriguez, and Rumbos, J. L., (Co)variance components, genetic parameters and annual trends for calf weights in a Brahman herd kept on floodable savanna, vol. 1, pp. 282-297, 2002.

(Co)variance components and genetic parameters were estimated for body weights of an elite Brahman herd under a designed, supervised management and genetic program, including strategic artificial insemination (AI). Restricted maximum likelihood methods were used with a univariate animal model for birth weight (BW) and a bivariate model for weaning weight (205-day weight, 205W) and 18-month weight (548-day weight, 548W).

Inheritance of resistance to Meloidogyne incognita race 2 in the hot pepper cultivar Carolina Cayenne (Capsicum annuum L.)

F. de Souza-Sobrinho, Maluf, W. Roberto, Gomes, L. A. A., and Campos, V. Paulo, Inheritance of resistance to Meloidogyne incognita race 2 in the hot pepper cultivar Carolina Cayenne (Capsicum annuum L.), vol. 1, pp. 271-279, 2002.

Root-knot nematodes of the genus Meloidogyne are important pathogens affecting vegetable crop production in Brazil and worldwide. The pepper species Capsicum annuum includes both hot and sweet peppers; very little emphasis has been placed on breeding sweet peppers for nematode resistance. We report on the inheritance of resistance to Meloidogyne incognita (Kofoid & White) Chitwood race 2 in the hot pepper cultivar Carolina Cayenne. The hot pepper cv. Carolina Cayenne was used as seed parent and the sweet pepper cv.

Estimates of heritability in a blanched asparagus population

V. Cravero, Cointry, E., Gatti, I., and Anido, F. López, Estimates of heritability in a blanched asparagus population, vol. 1, pp. 90-95, 2002.

To estimate the heritability values of characters frequently used as selective criteria, 32 half-sib families obtained from selected plants of three populations of the asparagus variety Argenteüil were evaluated in a randomized complete block design. The following characters were measured: days to emergence of the first spear, number and diameter of spears, number of stalks, plant height and average weight. The values of realized heritability were estimated and were compared with those obtained by the parent-offspring regression method.

Pages

Subscribe to Heritability