Tag Archives: heritability

612–628 G. Tobi, Y.E. Bahloul, S. Oumouss, I. Rahmouni, A. Birouk and O. Benlhabib
Productivity, heritability and stability analysis of a Moroccan sugar beet germplasm
Abstract |
Full text PDF (1 MB)

Productivity, heritability and stability analysis of a Moroccan sugar beet germplasm

G. Tobi¹²*, Y.E. Bahloul¹, S. Oumouss¹, I. Rahmouni¹, A. Birouk² and O. Benlhabib²

¹Regional Center of Agricultural Research of Rabat, Research Unit of Plant Improvement Conservation and Development of Phytogenetic Resources, Avenue Mohamed Belarbi Alaoui B.P: 6356 – Instituts, 10101 – Rabat, Morocco
²Research Unit of Applied Biotechnologies in Agriculture, Agrobiodiversity and Local Products, Department of Plant Protection Production and Biotechnology, Hassan II Institute of Agronomy and Veterinary Medicine, Avenue Allal EL FASSI – Madinat Al Irfane – BP 6202 – 10101 Rabat, Morocco
*Correspondence: g.tobi@iav.ac.ma

Abstract:

Progeny testing is the second part of maternal recurrent selection scheme adopted by INRA-Morocco for the national sugar beet breeding programme. The objective of this study is sugar beet germplasm productivity, heritability and stability analysis. The studied material concern 18 half-sib families (HSF) preselected initially for their seed production potential. Trials were conducted using randomised complete blocks designs during, 2013/14, 2014/15, 2015/16, 2017/18 campaigns in two experimental fields of INRA-Morocco; Sidi Allal Tazi (34° 30′ N, 6° 19′ W) and Larache (35° 11’ N, 6° 09’ W). Evaluated parameters concern the vigour, root weight (RW), leaf biomass yield (LBY), and sugar content (Sc). Data analysis by comparative procedures explores different accordance degrees of HSF versus controls. Good vegetative growth was observed, 85.6% closer to the maximal indicated scale level. The RW was significantly influenced by the genotype and reached a maximum of 1.06 kg versus 1.08 kg average recorded by controls. Sugar content recorded mean was 20.97% in HSF versus 21.39% in the controls. Most of HSF revealed mean values close to Z-type variety. Estimated heritability was 0.5 for RW, 0.2 for the LBY, and 0.02 for Sc. Sugar content was influenced by the environment and explained by the AMMI model (73.6%) versus 53.9% and 44.4% for root weight and leaf biomass yield respectively. The AMMI stability values showed F11, F12, F16, and F17 families as the most performing and stable HSF. Results demonstrate the relevance of the maternal recurrent selection scheme of the on-going national breeding programme.

Key words:

, , , , ,



77–87 O. Gayosso-Barragán, S.A. Rodríguez-Herrera, C.D. Petroli, O. Antuna-Grijalva, A. López-Benítez, A. Mancera-Rico, M.P. Luévanos-Escareño and A.J. Lozano-del Río
Genetic components for fodder yield and agronomic characters in maize lines
Abstract |
Full text PDF (373 KB)

Genetic components for fodder yield and agronomic characters in maize lines

O. Gayosso-Barragán¹⁷, S.A. Rodríguez-Herrera²*, C.D. Petroli³, O. Antuna-Grijalva⁴, A. López-Benítez², A. Mancera-Rico⁵, M.P. Luévanos-Escareño⁶ and A.J. Lozano-del Río²

¹Postgrado en Ciencias Agrarias, Universidad Autónoma Agraria Antonio Narro UL, Periférico Raúl López Sánchez, MX27054 Torreón, Coahuila, México
²Departamento de Fitomejoramiento, Universidad Autónoma Agraria Antonio Narro, Calzada Antonio Narro 1923, MX25315 Saltillo, Coahuila, México
³International Maize and Wheat Improvement Center (CIMMYT), El Batán Km. 45, MX56237, Texcoco, Estado de México, México
⁴Departamento de Fitomejoramiento, Universidad Autónoma Agraria Antonio Narro UL, Periférico Raúl López Sánchez, MX27054 Torreón, Coahuila, México
⁵Centro de Capacitación y Desarrollo en Tecnologías de Semillas, Universidad Autónoma Agraria Antonio Narro, Calzada Antonio Narro 1923, MX25315 Saltillo, Coahuila, México
⁶Facultad de Ciencias Biológicas, Universidad Autónoma de Coahuila, Carretera Torreón-Matamoros Km. 7.5, MX27275 Torreón Coahuila, México
⁷Centro Nacional de Investigación Disciplinaria en Agricultura Familiar (CENID AF), Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias (INIFAP). Carretera Ojuelos-Lagos de Moreno km 8.5, MX47540 Ojuelos, Jalisco, México
*Correspondence: sarh50@live.com.mx

Abstract:

In maize hybrid development, it is essential to know the parent’s performance per se in different environments as well as the genetic base in populations in order to facilitate selection of superior lines. The objective of this work was to estimate the genetic variance and heritability while assessing agronomic behavior in 237 maize fodder lines featuring different inbred levels and origin in two different locations. Traits such as plant height, cob height, stem diameter, and fodder yield were taken. A combined variance analysis was carried out using this information. The variable mean squares showing significant differences were used to estimate the genetic variance components. Significant differences were observed (p ≤ 0.01) for the line variation source and location × line interaction in all assessed characteristics. The genetic parameter estimation provided information on the existing genetic variance and heritability among the population which is important for the progress of the selection process. Lines CLWN701, CLWN345, CML476, CML216, CLWQ232, and CML 528 measured 74.8, 72.2, 67.7, 65.8, 63.8 and 62.5 t ha-1, respectively showed the highest yield potential for green fodder.

Key words:

, , , ,



97-102 K.K. Sabu , M.Z. Abdullah, L.S. Lim and R. Wickneswari
Analysis of heritability and genetic variability of agronomically important traits in Oryza sativa x O. rufipogon cross
Abstract |
Full text PDF (258 KB)

Analysis of heritability and genetic variability of agronomically important traits in Oryza sativa x O. rufipogon cross

K.K. Sabu ¹*, M.Z. Abdullah², L.S. Lim¹ and R. Wickneswari¹

¹ School of Environmental and Natural Resource Sciences, Faculty of Science and Technology,
Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor, Malaysia.
² Gene Bank, MARDI Seberang Perai, PO Box 203, 13200 Kepala Batas, Pulau Pinang,
Malaysia.
* Corresponding author; Present address: Tropical Botanic Garden and Research Institute,
Thiruvananthapuram 695562, India. Email: krishnan.sabu@gmail.com

Abstract:

Heritability is a measure of possible genetic advancement under selection. Estimation of variance components could imply partitioning of genetic variability over different sources of variation. This article describes statistical methods applied and some of the observations made on results of heritability and analysis of environmental variances of grain yield and related traits of progenies derived from a cross between wild and cultivated rice. The study shed light on the genetic information of grain yield and related traits such as their heritability, genetic and environmental effects in the F1 progenies of a cross between O. sativa and O. rufipogon. A considerable amount of additive genetic variation was found in these families. The traits with high heritability, considerable phenotypic correlation and low seasonal variability can be used in further improvement of the F1 progenies. The results obtained were highly promising and can be utilized to develop new rice cultivars.

Key words:

, , , ,



51-58 R. Sestras, E. Tamas, D. Pamfil, L. Mihalte,A. Sestras, L. Chis and C. Qin
The influence of the genotype upon the in vitro and in vivo growth of greenhouse carnations
Abstract |
Full text PDF (45 KB)

The influence of the genotype upon the in vitro and in vivo growth of greenhouse carnations

R. Sestras¹, E. Tamas¹, D. Pamfil¹, L. Mihalte¹,A. Sestras², L. Chis² and C. Qin³

¹University of Agricultural Sciences and Veterinary Medicine, Faculty of Horticulture, 3-5Manastur St., 3400 Cluj-Napoca, Romania, e-mail: rsestras@usamvcluj.ro
²Horticultural Research Station, 3-5 Horticultorilor St., Cluj-Napoca, Romania
³School of Life Science, Shanghai University, Shanghai, 200436, China

Abstract:

Carnations are familiar, widespread, and are among the most popular cut flowers. There is great diversity of greenhouse cultivars belonging to Dianthus caryophyllus L, habitually multiplied through cuttings or micro-propagation. In order to establish whether or not there is a connection between the vigour of the plants technically mature from the greenhouse and their in vitro growth, several traits of greenhouse carnation, grown both in vivo and in vitro were analysed in five cultivars (Polka, Tanga, Dark Tempo, Delphi and Indios). The influence of the genotype upon the vigour of the plants and upon the characteristics of the greenhouse flowers, as well as upon some features of the in vitro growth of the plantlets, was significant. The variability under in vivo conditions ranged from 5.0 to 17.8%, while the characteristics analysed in vitro showed a large span of variability values (s% = 7.9–51.0). Overall, the heritability showed high values for the analysed characteristics, both under in vivo (H2 = 0.660–0.949) and in vitro (H2 = 0.502–0.946) conditions. No statistically ensured correlations were recorded between the plant growth under in vivo conditions and of those with the same genotype under in vitro conditions; therefore the greater vigour of some genotypes from the greenhouse did not imply their more accentuated growth in vitro. The cultivars conspicuous for their superior characteristics will be used as genitors within the improvement programmes and also recommended to be tested for inclusion in the Official Catalogue of Plants.

Key words:

, , , , , ,



55–62 R. Sestras, E. Tamas and A. Sestras
Morphological and genetic peculiarities of fruits in several winter apple varieties which confer resistance to damage
Abstract |
Full text PDF (106 KB)

Morphological and genetic peculiarities of fruits in several winter apple varieties which confer resistance to damage

R. Sestras¹, E. Tamas¹ and A. Sestras²

¹University of Agricultural Sciences and Veterinary Medicine, Faculty of Horticulture, No. 3-5 Manastur St., 3400 Cluj-Napoca, Romania; e-mail: rsestras@email.ro
²Horticultural Research Station, 3-5 Horticultorilor St., Cluj-Napoca, Romania

Abstract:

Among 15 winter apple varieties studied for their resistance to the damage of fruits, Golden Delicious was susceptible to fruit injury, while the Florina, Idared and Granny Smith can be considered resistant to pricking, cutting and hitting of the fruits. The variability of the morphological characteristics of the fruits was relatively low, the fruit volume being averagely variable and the fruit resistance to injury being the character with the highest variability (s% = 26.4). The resistance of the fruits to injury was not correlated with their height, diameter, weight, shape and volume. The characteristics of the fruits have a strong genetic determinism, but the additive effects of the genes do not play the most important role in all cases. For the fruit resistance to injury the big differences between heritability coefficients values in a broad and narrow sense signify the fact that the resistance to injury of apples is influenced not only by additive effects but also by the dominance and epistasis effects of the genes.

Key words:

, , , , ,