Seed yield variation in plains rough fescue (Festuca hallii(Vasey) Piper) populations and its relation with phenotypic characteristics and environmental factors

2012 ◽  
Vol 68 (4) ◽  
pp. 589-595 ◽  
Author(s):  
B. Biligetu ◽  
M. P. Schellenberg ◽  
J. G. McLeod ◽  
Z. Wang
Keyword(s):  
Environmental Factors ◽  
Seed Yield ◽  
Phenotypic Characteristics ◽  
Yield Variation ◽  
Festuca Hallii ◽  
Rough Fescue

Characterization of morphological and yield variation of fenugreek (Trigonella foenum-graecum L.) genotypes

2019 ◽  
Author(s):  
Mahmut Çamlýca ◽  
Gülsüm Yaldýz
Keyword(s):  
Seed Yield ◽  
Seed Weight ◽  
Cultivated Plants ◽  
United States Department ◽  
Department Of Agriculture ◽  
Important Place ◽  
Trigonella Foenum Graecum ◽  
Yield Variation ◽  
Trigonella Foenum Graecum L

Trigonella foenum-graecum L. has an important place among cultivated plants in our country as well as in the world. This study was carried out to determine the morphological and yield properties of 118 fenugreek genotypes which obtained from United States Department of Agriculture and local cultivars. Among the genotypes and controls, plant height (24.95-85.15 cm), first pod height (17.00-35.78 cm), pod weight (0.63-63.05 g per plant-1), number of seed per pod (3.56-14.30), pod lenght (7.01-36.10 cm), 1000 seed weight (0.49-56.31 g) and seed yield per plant (0.21-27.44 g) were determined. As a result of study, the highest seed yield and 1000 seed weight were seen in PI 296394 genotype. Dendogram analysis grouped the set of fenugreek genotypes into two main groups and many of fenugreek genotypes in same origin were found in different groups.

scholarly journals Identification of Soybean Yield QTL in Irrigated and Rain-Fed Environments

Agronomy ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 2207
Author(s):  
Geung-Joo Lee ◽  
Sung-Woo Lee ◽  
Tommy E. Carter ◽  
Grover Shannon ◽  
Roger Boerma
Keyword(s):  
Abiotic Stress ◽  
Glycine Max ◽  
Quantitative Trait Loci ◽  
Ssr Markers ◽  
Seed Yield ◽  
Quantitative Trait ◽  
Genomic Region ◽  
Favorable Alleles ◽  
Yield Variation ◽  
Glycine Max L

Drought is the primary abiotic stress that limits yield of soybean (Glycine max (L.) Merr.). The study aimed to identify yield-related quantitative trait loci (QTLs) in soybeans using a population of 160 F4-derived lines from ‘Hutcheson’ × PI 471938 crosses, which were cultivated under rain-fed and irrigated conditions. Seed yield was determined based on a total of nine irrigated and five rain-fed environments over two years. Twenty and twenty-seven SSR markers associated with yield (P ≤ 0.05) were identified in the irrigated and rain-fed environments, respectively. Four markers accounted for 22% of the yield variation in the irrigated environments (IR-YLD) and five markers explained 34% of the yield variation in the rain-fed environments (RF-YLD). Two independent IR-YLD and RF-YLD QTLs on chromosome (Chr) 13 (LG-F) were mapped to the Satt395-Sat_074 interval (4.2 cM) and near Sat_375 (3.0 cM), which explained 8% (LOD = 2.6) and 17% (LOD = 5.5) of the yield variation, respectively. The lines homozygous for the Hutcheson allele at the IR-YLD QTL linked to Sat_074 averaged 100 kg ha−1 higher yield than the lines homozygous for the PI 471938 allele. At two independent RF-YLD QTLs on Chr 13 and Chr 17, the lines homozygous for the PI 471938 alleles were 74 to 101 kg ha−1 higher in yield than the lines homozygous for the Hutcheson alleles. Three of the five significant SSR markers associated with RF-YLD were located in a genomic region known for canopy-wilting QTLs, in which the favorable alleles were inherited from PI 471938. The identification of yield-QTLs under the respective rain-fed and irrigated environments provides knowledge regarding differential responses of yield under different irrigation conditions, which will be helpful in developing high-yielding soybean cultivars.

scholarly journals The studies on vegetation period and plant characters determining seed yield in soybean

2013 ◽  
Vol 34 (1) ◽  
pp. 113-127
Author(s):  
Jerzy Szyrmer
Keyword(s):  
Environmental Factors ◽  
Beneficial Effect ◽  
Protein Content ◽  
Seed Yield ◽  
Negative Correlation ◽  
Environmental Conditions ◽  
Vegetation Period ◽  
High Yielding Varieties ◽  
Selection Of ◽  
Better Than

12 Soybean strains bred by the author were tested with respect to their adaptation to different environments in the period 1975-1977. Better environmental conditions in Przecław (Rzeszów region) than in Radzików near Warsaw have beneficial effect on seed yield and the lenght of vegetation period in tested soybeans. Generaly, tested strains yielded better than population variety 'Warszawska' used as a check. Highest yield was produced by strain M-17/76 - 22,7 q/ha. This strain is already registered as a variety 'Ajma'. Seed yield, fat and protein content are determined by genotype and environmental factors. The negative correlation was found between seed yield, its components and the length of vegetation period. It suggests that selection of early and, at the some time, high yielding varieties can and should be done.

Distribution of annual Trifolium species in Morocco

1993 ◽  
Vol 44 (6) ◽  
pp. 1303 ◽  
Author(s):  
PE Beale ◽  
M Bounejmate ◽  
A Lahlou ◽  
DB Marx ◽  
S Christiansen
Keyword(s):  
Environmental Factors ◽  
Seed Yield ◽  
Phosphorus Content ◽  
Climatic Factors ◽  
Natural Distribution ◽  
Factors Affecting ◽  
Determinant Factors ◽  
Number Of Species ◽  
The Relationship

An ecogeographic survey was conducted in six key agricultural zones in Morocco to study the abundance and the relationship between the natural distribution of annual Trifolium species and environmental factors. Sixteen species of annual Trifolium species were identified. Most prolific was T. scabrum and the least were T. striatum and T. bocconei. Fifty-five percent of the sites had no Trifolium and the average number of species per site was 2.2. An average seed yield of 4.8 kg ha-1 was obtained. Both soil and climatic factors affected the occurrence of Trifolium species. Rainfall, pH and phosphorus content were the most determinant factors affecting the distribution of Trifolium species in Morocco.

Seed yield in caraway (Carum carvi). 1. Role of pollination

1995 ◽  
Vol 124 (2) ◽  
pp. 235-244 ◽  
Author(s):  
H. J. Bouwmeester ◽  
H. G. Smid
Keyword(s):  
Environmental Factors ◽  
The Netherlands ◽  
Seed Yield ◽  
Seed Set ◽  
Insect Pollination ◽  
Hand Pollination ◽  
Wet Weather ◽  
Seed Yields ◽  
Field Plots

SUMMARYSeed yields of caraway vary considerably between years, indicating that weather affects the yield-determining processes. Pollination could be one of these processes, because pollinator activity and efficiency are negatively affected by cold or wet weather. From 1990 to 1992 at the Research Institute for Agrobiology and Soil Fertility in Wageningen, The Netherlands, field and glasshouse experiments were performed to study the importance of pollination for caraway seed yields and the effects of some environmental factors. Preventing insect pollination by placing gauze cages in field plots reduced the yield of caraway by c. 15–20%, but under normal field conditions > 90% of hermaphrodite flowers were fertilized and additional hand-pollination did not improve yield. Removal of competing umbels enhanced the low seed set percentages in higher-order umbels, indicating that pollination did not limit seed yield in these umbels. Assays suggested that wind transfer, in addition to insects, plays a role in the pollination of caraway. It was concluded that assimilate availability and not pollination limits caraway seed yield.

Heterosis and genetic distance in rapeseed (Brassica napus L.): use of kinship coefficient

Genome ◽  
1987 ◽  
Vol 29 (1) ◽  
pp. 11-18 ◽  
Author(s):  
M. Lefort-Buson ◽  
Y. Dattee ◽  
B. Guillot-Lemoine
Keyword(s):  
Brassica Napus ◽  
Genetic Distance ◽  
Seed Yield ◽  
Inbred Lines ◽  
Kinship Coefficient ◽  
Agronomic Characters ◽  
Brassica Napus L ◽  
Cross Prediction ◽  
Yield Variation ◽  
The Relationship

Different agronomic characters have been measured on F1 rapeseeds from inbred lines that are more or less related and on their parents, in Rennes (France). Two different experiments were conducted over a 2-year period. A study of the relationship between heterosis and genetic distance, measured here by a function of kinship coefficient (1–ψ), was carried out in two steps. First, four classes of increasing 1–ψ values were defined and related to heterosis value and F1 performance. The results point out a significant effect of the class, whatever the character and the year. Moreover, the best heterotic hybrids were always obtained with lines unrelated and coming from two different geographic pools. Then, the efficiency of 1–ψ for predicting heterosis or cross values was tested: it varies with year and character. For example, in the first experiment average relationship between lines was high, about 50% of seed yield variation owing to mean parent heterosis was explained with the 1–ψ distance. Key words: heterosis, cross prediction, genetic distance, kinship coefficient, Brassica napus L.

scholarly journals Environmental Effects on Soybean (Glycine Max (L.) Merr) Production in Central and South Germany

Agronomy ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 1847
Author(s):  
Olena Sobko ◽  
Andreas Stahl ◽  
Volker Hahn ◽  
Sabine Zikeli ◽  
Wilhelm Claupein ◽  
...  
Keyword(s):  
Glycine Max ◽  
Environmental Factors ◽  
Solar Radiation ◽  
Protein Content ◽  
Seed Yield ◽  
Oil Content ◽  
Soybean Seed ◽  
Maturity Group ◽  
High Solar Radiation ◽  
Glycine Max L

The cultivation area of soybean (Glycine max (L.) Merr) is increasing in Germany as a way to ensure self-sufficiency through its use as feed and food. However, climatic conditions needed for soybean cultivation are not appropriate in all parts of the country. The objective of this study was to determine the influence of solar radiation, temperature, and precipitation on soybean seed productivity and quality in central and south Germany. A multi-factorial field trial was carried out with three replicates at four locations in 2016 and five locations in 2017, testing 13 soybean varieties from the maturity groups MG 00 and MG 000. Considering all the tested factors, “variety” was highly significant concerning protein content (Ø 41.1% dry matter (DM)) and oil content (Ø 19.1% in DM), but not seed yield (Ø 40.5 dt ha−1).The broad sense heritability of protein content was H2 = 0.80 and of oil content H2 = 0.7. Protein and oil content were significantly negatively correlated (r = −0.82). Seed yield was significantly positively correlated with solar radiation (r = 0.32) and precipitation (r = 0.33), but significantly negatively with Crop Heat Units (CHU) (r = −0.42). Over both experimental years, varieties from maturity group MG 00 were less significantly correlated with the tested environmental factors than varieties from maturity group MG 000. None of the environmental factors tested significantly increased the protein or oil content of soybean. In growing areas with heat periods during ripening, protein content tended to be higher than in cooler areas; in areas with high solar radiation during flowering, protein content tended to be reduced.

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