scholarly journals Multivariate genomic analysis and optimal contributions selection predicts high genetic gains in cooking time, iron, zinc, and grain yield in common beans in East Africa

2021 ◽  
Author(s):  
Renu Saradadevi ◽  
Clare Mukankusi ◽  
Li Li ◽  
Winnyfred Amongi ◽  
Julius Peter Mbiu ◽  
...  
Keyword(s):  
Grain Yield ◽  
East Africa ◽  
Genomic Analysis ◽  
Cooking Time ◽  
Common Beans ◽  
Genetic Gains

Photosynthetic organs contributions to grain yield genetic gains in Chilean winter wheat

2021 ◽  
Author(s):  
Abdelhalim Elazab ◽  
Felipe Moraga ◽  
Alejandro del Pozo
Keyword(s):  
Winter Wheat ◽  
Grain Yield ◽  
Genetic Gains

scholarly journals Genetic gain in the breeding program of common beans at IAC from 1989 to 2007

2010 ◽  
Vol 10 (4) ◽  
pp. 329-336 ◽  
Author(s):  
Alisson Fernando Chiorato ◽  
Sérgio Augusto Morais Carbonell ◽  
Roland Vencovsky ◽  
Nelson da Silva Fonseca Júnior ◽  
José Baldin Pinheiro
Keyword(s):  
Grain Yield ◽  
Common Bean ◽  
Genetic Gain ◽  
Grain Quality ◽  
The State ◽  
Breeding Program ◽  
Common Beans ◽  
The Common ◽  
The Mean ◽  
Second Period

The goal of the present work was to evaluate the genetic gain obtained in grain yield for the common bean genotypes from 1989 until 2007, at the Instituto Agronômico de Campinas, in the state of São Paulo. Genetic gain has been separated into two research periods; the first, from 1989 to 1996, and the second, from 1997 to 2007. In the first period, a genetic gain of 1.07 % per year was obtained, whereas for the second period, the gain was zero. However, the mean yield of the evaluated lines was approximately 1000 kg ha-1 superior to the figures obtained in the first period. The main cause for the absence of genetic gain in the second period is that the focus of the breeding program was changed to grain quality. The individualized analysis of the genotypes with carioca grains in the second period indicated the lack of genetic gain during the investigated period.

Grain Yield Gains and Associated Traits in Tropical X Temperate Maize Germplasm Under High and Low Plant Density

2021 ◽  
Author(s):  
Vince Ndou ◽  
Edmore Gasura ◽  
Pauline Chivenge ◽  
John Derera
Keyword(s):  
Population Density ◽  
Grain Yield ◽  
Plant Density ◽  
Plant Population ◽  
Population Densities ◽  
Genetic Gains ◽  
Maize Germplasm ◽  
High Plant Density ◽  
Number Of Leaves ◽  
Plant Population Density

Abstract Development of ideal breeding and crop management strategies that can improve maize grain yield under tropical environments is crucial. In the temperate regions, such yield improvements were achieved through use of genotypes that adapt high plant population density stress. However, tropical germplasm has poor tolerance to high plant population density stress, and thus it should be improved by temperate maize. The aim of this study was to estimate the genetic gains and identify traits associated with such gains in stable and high yielding temperate x tropical hybrids under low and high plant population densities. A total of 200 hybrids derived from a line x tester mating design of tropical x temperate germplasm were developed. These hybrids were evaluated for grain yield and allied traits under varied plant population densities. High yielding and stable hybrids, such as 15XH214, 15XH215 and 15XH121 were resistant to lodging and had higher number of leaves above the cob. The high genetic gains of 26% and desirable stress tolerance indices of these hybrids made them better performers over check hybrids under high plant population density. At high plant population density yield was correlated to stem lodging and number of leaves above the cob. Future gains in grain yield of these hybrids derived from temperate x tropical maize germplasm can be achieved by exploiting indirect selection for resistance to stem lodging and increased number of leaves above the cob under high plant density conditions.

scholarly journals Estimate of genetic parameters and predicted gains with early selection of physic nut families

2012 ◽  
Vol 36 (2) ◽  
pp. 163-170 ◽  
Author(s):  
Bruno Galvêas Laviola ◽  
Alexandre Alonso Alves ◽  
Fábio de Lima Gurgel ◽  
Tatiana Barbosa Rosado ◽  
Rhayanne Dias Costa ◽  
...  
Keyword(s):  
Grain Yield ◽  
Genetic Parameters ◽  
Genetic Variance ◽  
Additive Genetic Variance ◽  
Biodiesel Production ◽  
Early Selection ◽  
Physic Nut ◽  
Genetic Gains ◽  
Canopy Volume ◽  
Selection Of

An initial evaluation of early selection of physic nut genotypes based on phenotypic data is presented. In order to predict the genetic gains with early selection, genetic parameters, e.g. additive genetic variance, were first obtained for grain yield along with other numerous traits. The results demonstrated that additive genetic variance exists not only for grain yield, which is considered to be the most important trait for oil and biodiesel production, but also for numerous other traits. The predicted genetic gains for grain yield, considering the selection of the 30, 20, 10 and 5 best families in the second crop year are respectively, 40.47, 48.43, 61.78 and 70.28%. With the selection of highly yielding physic nut genotypes indirectly genotypes with enhanced volume would be also selected, because yield exhibits moderate to high genetic correlations with height e canopy volume. The results here presented demonstrate the potential of the population gathered in the Brazilian physic nut germplasm bank for genetic breeding purposes and that superior physic nut families can be selected with high accuracy based on the evaluation of its second crop.

scholarly journals Genetic Gains in Grain Yield Through Genomic Selection in Eight Bi-parental Maize Populations under Drought Stress

Crop Science ◽  
2015 ◽  
Vol 55 (1) ◽  
pp. 154-163 ◽  
Author(s):  
Yoseph Beyene ◽  
Kassa Semagn ◽  
Stephen Mugo ◽  
Amsal Tarekegne ◽  
Raman Babu ◽  
...  
Keyword(s):  
Drought Stress ◽  
Grain Yield ◽  
Genomic Selection ◽  
Genetic Gains ◽  
Maize Populations

Genetic gains in grain yield and related physiological attributes in Argentine maize hybrids

2006 ◽  
Vol 95 (2-3) ◽  
pp. 383-397 ◽  
Author(s):  
Sergio F. Luque ◽  
Alfredo G. Cirilo ◽  
María E. Otegui
Keyword(s):  
Grain Yield ◽  
Maize Hybrids ◽  
Genetic Gains ◽  
Physiological Attributes

Genetic gains in grain yield, net photosynthesis and stomatal conductance achieved in Henan Province of China between 1981 and 2008

2011 ◽  
Vol 122 (3) ◽  
pp. 225-233 ◽  
Author(s):  
T.C. Zheng ◽  
X.K. Zhang ◽  
G.H. Yin ◽  
L.N. Wang ◽  
Y.L. Han ◽  
...  
Keyword(s):  
Stomatal Conductance ◽  
Grain Yield ◽  
Net Photosynthesis ◽  
Henan Province ◽  
Genetic Gains

Nitrogen Fertilization and Inoculation of Seeds with Rhizobium tropici on the Agronomic Performance of Common Beans

2019 ◽  
pp. 1-9
Author(s):  
Darlan Capelesso ◽  
Antonio Carlos Torres da Costa ◽  
José Barbosa Duarte Júnior
Keyword(s):  
Grain Yield ◽  
Nitrogen Fertilization ◽  
Positive Influence ◽  
Seeding Density ◽  
Agronomic Performance ◽  
Common Beans ◽  
Phaseolus Vulgaris L ◽  
Rhizobium Tropici ◽  
Seed Inoculation ◽  
No Till

Aims: This study aimed to evaluate the influence of nitrogen fertilization and inoculation of seeds with Rhizobium tropici on the agronomic performance of common bean (Phaseolus vulgaris L.). Study Design: The experimental design consisted of a randomized block in a 4x2 factorial layout, with 4 replicates, the first factor referring to inoculant doses (0, 50, 100 and 200 mL for each 25 kg of seed), while the second refers to nitrogen fertilization (0 and 40 kg ha of N). Place and Duration of Study: The study was conducted to the field in a no-till system area, in the southwestern region of Paraná, Brazil. The soil is classified as a Purple Latosol, with a clayey texture. Methodology: The adopted spacing was 0.45 m between rows, and the seeding density used was 12 seeds per furrow meter. The inoculants NITRO 1000 Rhizobium tropici SEMIA 4077 and SEMIA 4088 were applied, varied according to the treatments. The cultivar used was IPR – Tangará. Results: As for grain yield, it was observed that nitrogen fertilization did not contribute to the increase in grain yield, and higher productivity was obtained in the absence of N. This was probably due to the high content of organic matter present in the soil. Conclusion: Nitrogen fertilization at sowing and seed inoculation with Rhizobium tropici did not influence the plant population and the 1000-grain mass. In the absence of nitrogen fertilization at sowing, pods with a longer length and higher grain yield were obtained. Inoculation of the seeds with Rhizobium tropici exerts a positive influence on plant height, number of nodes of the main stem, number of pods per plant, and number of beans per pod, the dose recommended by the manufacturer (100 mL) being efficient, with the possibility of applying a dose of 50 mL, to satisfactory results.

scholarly journals Genetic Gains for Grain Yield in CIMMYT's Semi‐Arid Wheat Yield Trials Grown in Suboptimal Environments

Crop Science ◽  
2018 ◽  
Vol 58 (5) ◽  
pp. 1890-1898 ◽  
Author(s):  
L. A. Crespo-Herrera ◽  
J. Crossa ◽  
J. Huerta-Espino ◽  
M. Vargas ◽  
S. Mondal ◽  
...  
Keyword(s):  
Grain Yield ◽  
Wheat Yield ◽  
Genetic Gains ◽  
Yield Trials ◽  
Semi Arid
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