DIALLEL ANALYSIS OF THE INHERITANCE OF QUANTITATIVE CHARACTERS IN CABBAGE (BRASSICA OLERACEA L. VAR. CAPITATA L.)

1969 ◽  
Vol 11 (1) ◽  
pp. 103-109 ◽  
Author(s):  
Morgan S. Chiang
Keyword(s):  
Inner Core ◽  
Diallel Analysis ◽  
Diallel Cross ◽  
Effective Factors ◽  
Quantitative Characters ◽  
Equatorial Diameter ◽  
Equal Importance ◽  
Days To Maturity ◽  
Polar Diameter ◽  
Brassica Oleracea L

Additivity of inheritance of length of inner core and days to maturity appeared to be rather important in this diallel cross of cabbage. Equal importance of additivity and dominance was observed in polar diameter and equatorial diameter of cabbage heads. Dominance contributed a large portion of genetic variation in yield while number of wrapper leaves varied with environment. However, there were indications that overdominance was also involved in all characters except polar diameter and days to maturity. The effective factors controlling each character ranged from one to three. The heritability values were high for polar diameter and days to maturity, moderate for number of wrapper leaves and length of inner core, and low for equatorial diameter and yield.

Diallel analysis of yield and yield components of winged bean (Psophocarpus tetragonolobus (L.) D.C.)

1986 ◽  
Vol 106 (3) ◽  
pp. 485-490 ◽  
Author(s):  
H. N. De Silva ◽  
A. Omran
Keyword(s):  
Grain Yield ◽  
Combining Ability ◽  
Yield Components ◽  
Diallel Analysis ◽  
Diallel Cross ◽  
Winged Bean ◽  
Specific Combining Ability ◽  
Psophocarpus Tetragonolobus ◽  
Equal Importance ◽  
Yield And Yield Components

SummaryThe variability revealed in a half-diallel cross between nine diverse genotypes of winged bean (Psophocarpus tetragonolobus (L.) D.C.) in regard to yield and yield components was studied in the F1 generation. The results indicated that high genetic variability existed for all traits. With respect to seed size, general combining ability effects alone were adequate to predict the performance of hybrids. For numbers of pods per plant and seeds per pod, both general and specific combining ability effects were of equal importance, while the performance of hybrids for grain yield was mainly dependent on specific combining ability effects. Heterosis was clearly evident for number of seeds per pod and grain yield. Of the yield components, number of pods per plant exhibited a positive genotypic association of appreciable magnitude with grain yield, showing its usefulness as an indicator of yield in selection.

Island guano and its effect on the yield of cabbage (Brassica oleracea L) variety Lombarda (Capitata f. rubra) in Colicocha - Huánuco

2020 ◽  
Vol 2 (1) ◽  
pp. 33-38
Author(s):  
Santos Jacobo-Salinas ◽  
Keyword(s):  
Brassica Oleracea ◽  
Sea Level ◽  
Block Design ◽  
Equatorial Diameter ◽  
Physical Chemical ◽  
The World ◽  
Random Block ◽  
Random Block Design ◽  
Polar Diameter ◽  
Brassica Oleracea L

Island guano is one of the best quality natural fertilizers in the world for its high content of nutrients and improves the physical, chemical and microbiological conditions of the soil. The objective of the investigation was to evaluate the effectiveness of island guano in the yield of the red cabbage variety lombarda. It was carried out in the Colicocha Huánuco hamlet positioned at 09 ° 53´34.5” LS, 75 ° 59´49” LO and 2 606 meters above sea level. The methodology used was the Complete Random Block Design (DBCA) with four repetitions and treatments, and they were: 3 t.ha-1 (T1), 4 t. ha-1 (T2), 5 t. ha-1 (T3) and witness (T4). The evaluated variables were: equatorial diameter, polar diameter, pellet weight per plant, experimental net area (ANE) and the yield per hectare. The results of the study indicate that the dose of 5 t.ha-1 of island guano showed a statistically significant result in all the variables evaluated, in the equatorial diameter (23.73 cm), polar diameter (24.80 cm), pellet weight per plant (4.15 kg), by ANE (66.40 kg) and the yield per hectare (70550.00 kg. ha-1 ). Keywords: dose, pellet, weight, purple cabba

scholarly journals Irrigation and fertigation frequencies with nitrogen in the watermelon culture

Bragantia ◽  
2014 ◽  
Vol 73 (2) ◽  
pp. 106-112 ◽  
Author(s):  
Carlos Newdmar Vieira Fernandes ◽  
Benito Moreira de Azevedo ◽  
Joaquim Raimundo Nascimento Neto ◽  
Thales Vinícius de Araújo Viana ◽  
Geocleber Gomes de Sousa
Keyword(s):  
Growth Performance ◽  
Shell Thickness ◽  
Citrullus Lanatus ◽  
Fruit Weight ◽  
Soluble Solids ◽  
Irrigation Frequency ◽  
Marketable Yield ◽  
Equatorial Diameter ◽  
Polar Diameter

This study evaluates the influence of different irrigation frequencies and different nitrogen fertigation frequencies on the growth performance of the watermelon (Citrullus lanatus) culture. Two experiments were conducted at the Paraguay farm in the Cruz municipality, Ceará, Brazil. They was randomized blocks design with six treatments and four replications. The irrigation frequency experiment consisted of the application of different irrigation frequencies. The treatments were: DM - daily irrigation in the morning with 100% daily dosage; DT - daily irrigation in the afternoon, with 100% daily dosage; DMT - twice daily irrigation, with 50% daily dosage in the morning and 50% daily dosage in the afternoon; 2D - irrigation every two days; 3D - irrigation every three days and 4D - irrigation every four days. To the experiment with different nitrogen fertigation frequencies, the treatments used were: 2F - 2 fertigations in a cycle; 4F - 4 fertigations in a cycle; 8F - 8 fertigations in a cycle; 16F - 16 fertigations in a cycle; 32F - 32 fertigations in a cycle and 64F - 64 fertigations in a cycle. We evaluated the marketable yield (PC), fruit weight (M), polar diameter (DP), equatorial diameter (DE), shell thickness (EC) and soluble solids (SS). The irrigation frequency treatments influenced all variables significantly, with twice daily irrigation (DMT, 50% in the morning and the 50% in the afternoon) promoting the highest productivity (69.79 t ha-1). The different frequencies of fertigation also significantly influenced all variables, except for the shell thickness, the highest yield (80.69 t ha-1) being obtained with treatment 64 fertigations in a cycle.

scholarly journals Pollen morphology and availability of pollen and stigma in Syzygium (Myrtaceae)

2019 ◽  
Vol 41 (6) ◽  
Author(s):  
Guilherme Nacata ◽  
Talita Kely Belonsi ◽  
Eduardo Custódio Gasparino ◽  
Renata Aparecida de Andrade
Keyword(s):  
Flower Development ◽  
Pollen Morphology ◽  
Pollen Grains ◽  
Scanning Microscopy ◽  
Stigma Receptivity ◽  
Equatorial View ◽  
Equatorial Diameter ◽  
Species Overlap ◽  
Polar Diameter

Abstract The present study aimed to describe the pollen morphology in three species of Syzygium, to test pollen availability and stigma receptivity. The pollen was analyzed by light and scanning microscopy to show the detailed ornamentation of the pollen grains. Pollen availability was measured according to two protocols. Stigmatic receptivity was tested at different stages of flower development. There are differences among the pollen morphology for the species studied; when the polar and equatorial diameters are measured in the equatorial view of the pollen grains, it is observed that S. jambos is the largest species concerning the two values of the diameters, S. malaccense is the smallest species and S. aqueum, the largest species in relation to the polar diameter in the equatorial view. For the equatorial diameter in equatorial view, S. aqueum showed the smallest diameters and S. malaccense, the major diameters, but the two species overlap in the values of the measured diameters. There are variations in the number of apertures in the pollen grains. Alexander’s stain is more sensitive to estimate pollen availability and the species S. aqueum and S. jambos have the same schedules of pollen availability and stigma receptivity.

scholarly journals DIALLEL ANALYSIS OF TOLERANCE TO DROUGHT IN COWPEA GENOTYPES

2018 ◽  
Vol 31 (1) ◽  
pp. 40-47 ◽  
Author(s):  
ERINA VITÓRIO RODRIGUES ◽  
KAESEL JACKSON DAMASCENO-SILVA ◽  
MAURISRAEL DE MOURA ROCHA ◽  
EDSON ALVES BASTOS ◽  
ADRIANO DOS SANTOS
Keyword(s):  
Water Deficit ◽  
Recurrent Selection ◽  
Diallel Analysis ◽  
Diallel Cross ◽  
Limiting Factors ◽  
Additive Effects ◽  
Negative Effects ◽  
Complete Diallel Cross ◽  
Brazilian Northeast ◽  
Block Experiment

ABSTRACT The low use of technologies by farmers and the occurrence of biotic and abiotic stresses are limiting factors for cowpea production in the Brazilian Northeast region. The tolerance of genotypes to drought is an alternative to decrease the negative effects of stresses on cowpea production. Thus, the objective of this work was to identify parents and combinations of cowpea genotypes with high probability of generating segregating populations with tolerance to drought. Six cowpea genotypes were crossed in a complete diallel cross design, totaling 30 F2 populations, which were evaluated together with their parents in an experiment under water deficit at the experimental field of the Embrapa Mid-North, Teresina, State of Piauí, Brazil. A triple lattice incomplete block experiment design was used, with three replications, with experimental plot consisting of six 2-m plant rows. Fifteen plants per plot were sampled to evaluate their agronomic characteristics, whose results were subjected to analysis of variance and means were used to estimate the general and specific combining abilities. The genotypes showed significant differences in all characteristics evaluated, denoting the genetic variability of the population. The additive effects were more important than the non-additive effects, and maternal inheritance was detected. The genotypes BRS Xiquexique, Pingo-de-Ouro-1-2 and MNC99-510F-16-1 were the most promising for use in recurrent selection programs for tolerance to water deficit. The hybrid combinations (1) BRS Paraguaçu X (4) CNCx-698-128G, (2) Pingo-de-Ouro-1-2 X (3) BRS Xiquexique, (3) BRS Xiquexique X (5) Santo-Inácio, (4) CNCx-698-128G X (6) MNC99-510F-16-1 and (5) Santo-Inácio X (4) CNCx-698-128G showed potential for generating superior lineages regarding bean production and tolerance to water deficit.

The usefulness and limitations of estimating the number of genes in a barley breeding programme

1985 ◽  
Vol 105 (2) ◽  
pp. 285-290 ◽  
Author(s):  
W. Powell ◽  
P. D. S. Caligari ◽  
J. L. Jinks
Keyword(s):  
Inbred Lines ◽  
Breeding Programme ◽  
Single Seed Descent ◽  
Effective Factors ◽  
Barley Breeding ◽  
The Past ◽  
Doubled Haploidy ◽  
Quantitative Characters ◽  
Effective Factor ◽  
Number Of Genes

SUMMARYRandom inbred lines produced by doubled haploidy and single seed descent have been used to estimate the number of genes or more correctly effective factors (k) controlling quantitative characters in barley. Estimates of k obtained by various biometrical methods are generally an underestimate since the effective factor may be considered a unit only in a temporary sense. In the past, estimates of k have been used to predict the range of inbreds extractable from a cross. Alternative and efficient methods are now available to predict the number of inbreds expected to exceed any given standard. Under these circumstances the need to estimate the number of genes is questionable.

Quantitative genetic studies of yield, yield components, and phenological and agronomic characters in spring faba bean

Genome ◽  
1987 ◽  
Vol 29 (1) ◽  
pp. 169-173 ◽  
Author(s):  
H. M. Kao ◽  
P. B. E. McVetty
Keyword(s):  
Vicia Faba ◽  
Faba Bean ◽  
Yield Components ◽  
Harvest Index ◽  
Dry Matter ◽  
Diallel Analysis ◽  
Diallel Cross ◽  
Agronomic Characters ◽  
Vicia Faba L ◽  
Faba Beans

Hayman's diallel cross analysis was employed to investigate the nature of the genetic control and heritability of yield, yield components, and phenological and agronomic characters in F1 and F2 generations of spring faba beans (Vicia faba L.). High-yielding S4 inbred lines from five open-pollinated faba bean cultivars were used as parents to generate complete F1 and F2 diallels. The S5 inbred line parents and the 20 cross combinations were planted in randomized complete block experiments with six replications. All characters in the F1 diallel and in the F2 diallel with the exception of days from planting to maturity met all of the assumptions required for Hayman's diallel analysis. Yield, total dry matter, harvest index, and pods per plant exhibited significant apparent overdominance in both the F1 and F2 diallels. It is concluded that substantial immediate increases in yield and total dry matter could be expected from exploiting the apparent overdominant gene action found for these characters in these crosses via F1 hybrids or synthetics. Key words: total dry matter, harvest index, diallel crosses, inheritance, Vicia faba L.

Sign in / Sign up

Export Citation Format

Share Document