Diallel Analysis of Genetic Variation in Pigeon Pea (Cajanus cajan)

1977 ◽  
Vol 13 (2) ◽  
pp. 193-200 ◽  
Author(s):  
B. S. Dahiya ◽  
J. S. Brar
Keyword(s):  
Flowering Time ◽  
Cajanus Cajan ◽  
Seed Weight ◽  
Diallel Analysis ◽  
Diallel Cross ◽  
Pigeon Pea ◽  
Graphical Analysis ◽  
Variance Component Analysis ◽  
100 Seed Weight ◽  
Pod Number

SUMMARYA diallel analysis of flowering time, pod number, 100-seed weight and yield of six cultivars of Cajanus cajan (L.) Millsp. was studied. Additive inheritance was important in determining flowering time, but the dominance component was higher than the additive component, and over-dominance was observed for pod number, 100-seed weight and yield. Heritability estimates for all the traits except flowering time were quite low, and the bulk population method of breeding was suggested for early segregating generations. The graphical analysis of the diallel cross was in close agreement with the findings from variance component analysis. It is suggested that the best cross would be that between two parents chosen on the basis of their low g.c.a. for flowering time and their high g.c.a. for other traits.

scholarly journals Fitness of F1 hybrids between 10 maternal wild soybean populations and transgenic soybean

2021 ◽  
Author(s):  
Jin Yue Liu ◽  
Ze Wen Sheng ◽  
Yu Qi Hu ◽  
Qi Liu ◽  
Sheng Qiang ◽  
...  
Keyword(s):  
Seed Weight ◽  
Wild Soybean ◽  
F1 Hybrids ◽  
Weed Competition ◽  
Transgenic Soybean ◽  
Wild Progenitor ◽  
F1 Hybrid ◽  
Dry Biomass ◽  
100 Seed Weight ◽  
Pod Number

AbstractThe releasing of transgenic soybeans (Glycine max (L.) Merr.) into farming systems raises concerns that transgenes might escape from the soybeans via pollen into their endemic wild relatives, the wild soybean (Glycine soja Sieb. et Zucc.). The fitness of F1 hybrids obtained from 10 wild soybean populations collected from China and transgenic glyphosate-resistant soybean was measured without weed competition, as well as one JLBC-1 F1 hybrid under weed competition. All crossed seeds emerged at a lower rate from 13.33–63.33%. Compared with those of their wild progenitors, most F1 hybrids were shorter, smaller, and with decreased aboveground dry biomass, pod number, and 100-seed weight. All F1 hybrids had lower pollen viability and filled seeds per plant. Finally, the composite fitness of nine F1 hybrids was significantly lower. One exceptional F1 hybrid was IMBT F1, in which the composite fitness was 1.28, which was similar to that of its wild progenitor due to the similarities in pod number, increased aboveground dry biomass, and 100-seed weight. Under weed competition, plant height, aboveground dry biomass, pod number per plant, filled seed number per plant, and 100-seed weight of JLBC-1 F1 were lower than those of the wild progenitor JLBC-1. JLBC-1 F1 hybrids produced 60 filled seeds per plant. Therefore, F1 hybrids could emerge and produce offspring. Thus, effective measures should be taken to prevent gene flow from transgenic soybean to wild soybean to avoid the production F1 hybrids when releasing transgenic soybean in fields in the future.

scholarly journals Inter-Relationship between Seed Yield and Some Morphological and Biochemical Traits in Lentil (Lens culinaris L.)

2021 ◽  
Vol 9 (4) ◽  
pp. 146-151
Author(s):  
G. S. Mandal ◽  
Keyword(s):  
Plant Height ◽  
Seed Yield ◽  
Indirect Effect ◽  
Seed Weight ◽  
Seed Protein ◽  
Genetic Advance ◽  
Seed Protein Content ◽  
Leaf Chlorophyll ◽  
100 Seed Weight ◽  
Pod Number

Correlation Study with Path analysis was performed on 29 Lentil Genotypes to determine direct and indirect effect of some morphological as well as Biochemical parameters on Yield. Following traits were studied: Root Nodule number, Nodule weight, Primary Root Length, Secondary root numbers, Root Fresh and Dry weight, Plant Height, Pods per plant, Days to 50% Flowering, 100 seed weight, Leaf chlorophyll content, Seed Carbohydrate with Starch content, Seed Protein content and Yield. Considering both genetic Advance and GCV, it was observed that selection for the following characters viz. Plant Height, Pods per plant, Days to 50% flowering, 100 seed weight, Seed Protein content & Yield will be rewarding. Seed Yield per plant showed significantly Positive correlation with the following traits: 100 Seed weight, Pod number per plant, Plant height and seed starch. Negative association with yield was found for Days to 50% flowering. Path coefficient study revealed that there was a strong positive direct effect of 100 seed weight and Pod no. per plant along with Leaf Chlorophyll content on Yield. Hence, direct selection only for Pods number and 100 seed weight will be rewarding as these characters also gave higher heritability % along with high Genetic advance. Plant height gave strong negative direct effect on yield, but it gave a positive correlation due to high indirect effect in association with pod number. It may be due to short winter span of West Bengal which results into forced maturity of the crops. So short plants with higher pod numbers will be desirable for higher yield in short winter span condition.

scholarly journals HALF DIALLEL ANALYSIS FOR F3 GENERATION OF PEA (Pisum sativum L.) UNDER SULAIMANI CONDITION-IRAQ KURDISTAN REGION

2020 ◽  
Vol 51 (3) ◽  
pp. 848-855
Author(s):  
Towfiq & et al.
Keyword(s):  
Seed Weight ◽  
Block Design ◽  
Diallel Analysis ◽  
Plant Weight ◽  
Randomized Block Design ◽  
Degree Of Dominance ◽  
Additive Gene ◽  
The Cross ◽  
Pod Length ◽  
100 Seed Weight

This study was carried out at Qlyasan  location in Sulaimani region (Lat 35 º 34' 307''; N, long 45º 21' 992; E, 765 masl) for F3 generation of seven pea varieties (1-Avolla, 2-Americana, 3-Jeza, 4-Joneor, 5-Packland, 6-Arvena and 7-Samara). The seeds of 21 F3 crosses and their parents were sown in Completely Randomized Block Design (CRBD).With three replicates. The results showed that the mean squares of genotypes, gca and sca were highly significant for seed weight plant-1 and most its important components. The parents Americana and Jeza recorded maximum values for all studied characters. The cross AvollaxAmericana recorded the highest value for seed weight plant-1 and pod weight plant-1. The cross AvollaxPackland had the highest value for heterosis due to seed weight plant-1 122.114% and whole plant weight 147.111%. The parent Americana recorded maximum positive gca effect value for seed weight plant-1 and some its components pod length, pod weight plant-1 and 100-seed weight. The crosses JezaxArvena recorded maximum positive sca effect value for seed weight plant-1, while the cross AvollaxArvena showed maximum positive sca effect value for pod length and pod plant-1. The average degree of dominance was more than one for all characters indicating to the importance of non additive gene effect in controlling the inheritance of these characters. Heritability in broad sense was high for seed weight plant-1 and some its components pods number plant-1, pod weight plant-1 and 100-seed weight, while it was low in narrow sense for all characters.

scholarly journals Determinate pigeon pea [Cajanus cajan (L) Millsp] genotypes on the north and south coasts of Puerto Rico

1969 ◽  
Vol 72 (4) ◽  
pp. 545-556
Author(s):  
Abad Morales ◽  
Brunilda Luciano ◽  
Francisco H. Ortiz ◽  
Nabor Mendoza
Keyword(s):  
Cajanus Cajan ◽  
Seed Weight ◽  
Pigeon Pea ◽  
Date Seed ◽  
The North ◽  
Agricultural Experiment ◽  
Almost All ◽  
North And South ◽  
Number Of Seeds ◽  
Better Than

Seven experiments were established at the Juana Díaz and Isabela agricultural experiment substations to evaluate the performance of determinate pigeon pea [Cajanus cajan (L.) Millsp] genotypes. Significant differences were found for yield, height, flowering date, seed weight and number of seeds per pod in almost all the experiments. Many genotypes performed better than the commercial cultivar 2B-Bushy used as check.

scholarly journals Graphical analysis (Wr- Vr) and study of genetic ratio in Lentil (Lens culinaris Medikus.)

2018 ◽  
Vol 33 (00) ◽  
Author(s):  
Mamta Singh ◽  
S.K. Verma
Keyword(s):  
Plant Height ◽  
Maximum Concentration ◽  
Seed Weight ◽  
Lens Culinaris ◽  
Graphical Analysis ◽  
Breeding Programme ◽  
Additive Component ◽  
Days To Maturity ◽  
Half Diallel ◽  
100 Seed Weight

Graphical analysis was performed in 8 lentil genotypes crossed in a half diallel manner. The analysis revealed over-dominance for the traits under study. PL 6 had maximum concentration of dominant alleles for seeds/pod, pods/plant, plant height, and days to maturity. For 100 seed weight, days to 50% flowering and primary branches/plant parent PL 7 had maximum concentration of dominant alleles. For pods/cluster and days to maturity parent 6 had maximum concentration of dominant alleles. Use of such superior cultivars with greater proportions of dominant alleles can be focused focus for development of hybrids in lentil breeding programme. Thus hybridizing parent PL 6, PL 7 and L 4188 with other lines are suggested to yield superior crosses. Hayman’s genetic ratios also confirmed the major contribution of non-additive component in governing traits.

Estimates of combining ability, reciprocal effects and heterosis for yield and yield components in a common bean diallel cross

1983 ◽  
Vol 100 (1) ◽  
pp. 103-108 ◽  
Author(s):  
M. R. Foolad ◽  
A. Bassiri
Keyword(s):  
Common Bean ◽  
Seed Yield ◽  
Combining Ability ◽  
Seed Weight ◽  
Statistical Significance ◽  
Diallel Cross ◽  
Reciprocal Effects ◽  
Diallel Crossing ◽  
100 Seed Weight ◽  
Number Of Seeds

SUMMARYA diallel crossing system involving two Pinto and two Kidney common bean (Phaseolus vulgaris L.) cultivars was evaluated in the field. Pin toes were significantly different from the Kidneys in seed yield and numbers of pods and seeds per plant and 100·seed weight. All the traits showed statistical significance among crosses and in comparisons involving parental v. cross means. Heterosis values were large and significant for yield, numbers of pods and seeds per plant, number of seeds per pod and number of days from planting to flowering. The ratio of general to specific combining ability mean squares was low for yield, numbers of pods and seeds per plant and high for 100·seed weight and number of days to flowering. Significant reciprocal effects were found for seed yield and number of seeds per plant, but this effect was completely absent for 100·seed weight.

Agronomic studies on Pigeon pea (Cajanus cajan (L) Millsp.) II.* Responses to sowing density

1975 ◽  
Vol 26 (1) ◽  
pp. 57 ◽  
Author(s):  
JO Akinola ◽  
PC Whiteman
Keyword(s):  
Seed Yield ◽  
Yield Components ◽  
Cajanus Cajan ◽  
Dry Matter ◽  
Pigeon Pea ◽  
Stem Length ◽  
Dry Matter Yield ◽  
Area Index ◽  
Density Relationship ◽  
Pod Number

Vegetative and seed yield in Cajanus cajan accession UQ1 were investigated over nine sowing densities ranging from 6727 to 215,278 plants per hectare. Dry matter yield per plant declined asymptotically with increasing density, while the yield per hectare v. density relationship was described by a parabolic curve. The highest yield per hectare (22,950 kg) was produced at the 0.305 by 0.305 m spacing (107,639 plants ha-1). Maximum seed yield (2774 kg ha-1) was attained at a relatively low density at a spacing 0.914 by 0.610 m (17,940 plants ha-1). At higher densities, increased stand mortality and reduced numbers of pods per plant resulted in severe yield reductions. Reduced pod number per plant was related to significant reductions in the number of pod-producing branches and the inflorescence-bearing stem length, with little change in seed size or seeds per pod. Interactions of yield components, leaf area index, and other plant parameters are discussed. *Part I, Aust. J. Agric. Res., 26: 43 (1975).

Effects of Growth Regulators on Pigeon Pea (Cajanus cajan)

1975 ◽  
Vol 11 (4) ◽  
pp. 241-245 ◽  
Author(s):  
John L. Hammerton
Keyword(s):  
Growth Regulators ◽  
Cajanus Cajan ◽  
Pigeon Pea ◽  
Resistant Cultivar ◽  
Susceptible Cultivar ◽  
Leaf Fall ◽  
Seed Number ◽  
Pod Number

SUMMARYEthephon substantially increased pod numbers of a rust-susceptible cultivar, by inducing leaf fall and a second flowering, but had no such effect on a rust-resistant cultivar. The treatment reduced seed number per pod in both cultivars. B-9 increased pod number in the rust-resistant cv. but reduced mean pod weight and seed number per pod.

DIALLEL ANALYSIS OF FLOWERING-TIME IN CORN (ZEA MAYS) USING A CORN HEAT UNIT TRANSFORMATION

1980 ◽  
Vol 22 (4) ◽  
pp. 633-640 ◽  
Author(s):  
S. B. Rood ◽  
D. J. Major
Keyword(s):  
Zea Mays ◽  
Flowering Time ◽  
Combining Ability ◽  
Zea Mays L ◽  
Diallel Analysis ◽  
Diallel Cross ◽  
Specific Combining Ability ◽  
Dominance Model ◽  
Genetic Interpretation ◽  
Array Position

A set of eight corn (Zea mays L.) inbreds was studied in a diallel cross over two years and in a growth room to investigate general and specific combining ability for flowering-time. Diallel analysis of days from emergence to flowering revealed a failure of the joint Wr/Vr regression in one of the years, indicating a lack of agreement with the simple additive-dominance model of inheritance. The array position changed across the years and environments, complicating genetic interpretation. Transforming data of flowering-time to cumulative corn heat units (CHU) to flowering gave a better fit. Joint regression was satisfactory and array position was more consistent across years and environments. Dominance was incomplete for low CHU to flowering. Positive (increasing CHU) and negative, as well as dominant and recessive, alleles were in about equal frequencies. Heritability estimates in the broad- and narrow-sense were high. The estimates of general combining ability were higher than the estimates of specific combining ability in all studies.

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