Genetic analysis of quantitative traits in cowpea [vigna unguiculata (L.) walp.] using six parameter genetic model

2016 ◽  
Author(s):  
Anand Singh ◽  
Y. V. Singh ◽  
Asheesh Sharma ◽  
Amit Visen ◽  
Mithilesh Kumar Singh ◽  
...  
Keyword(s):  
Mosaic Virus ◽  
Seed Yield ◽  
Quantitative Traits ◽  
Recurrent Selection ◽  
Genetic Model ◽  
Dominance Effect ◽  
Cowpea Mosaic Virus ◽  
Generation Mean Analysis ◽  
Significant Additive Effect ◽  
Pod Length

Generation Mean Analysis was carried out using six basic generations in 3 different crosses of cowpea to determine suitable breeding methods. For most of the studied traits, additive, dominance, additive x additive, additive x dominance and dominance x dominance effects were significant. Additive effect significantly contributed for days to 1st flowering and seed yield per plant. Dominance effect was significant for the incidence of cowpea mosaic virus in family 1, while for pod maturity in family 2. Additive x dominance type of interaction contributed significantly for days to 1st flowering, days to pod maturity and seed yield per hectare. Duplicate type of epistasis was observed for days to 1st flowering and incidence of cowpea mosaic virus in family 1, number of pods per plant and pod length in family 2 and 3. The findings suggested that pureline, pedigree and recurrent selection could be followed in cowpea improvement.

Variability and association studies and screening of genotypes against pea seed borne mosaic virus (psmv) in lentil (lens culinaris medik) under NW- Himalayas of Jammu and Kashmir

2015 ◽  
Author(s):  
Sanjeev Kumar ◽  
Praveen Singh ◽  
Sanjay Khar ◽  
Magdeshwar Sharma
Keyword(s):  
Mosaic Virus ◽  
Seed Yield ◽  
Association Studies ◽  
Phenotypic Expression ◽  
Phenotypic Selection ◽  
Genotypic Differences ◽  
Jammu And Kashmir ◽  
Wide Range ◽  
Pod Length ◽  
Pea Seed

The phenotypic expression and heritability of quantitative traits vary due to genotypic differences and environmental influences. Maximum heritability was found in number of pods/plant (99.43%) followed by seed yield/plant (99.06%) and number of primary branches/plant (98.74%). The presence of considerable degree of genotypic variances among tested genotypes under different environments suggests that success in lentil breeding could possibly be achieved through direct phenotypic selection. Seed yield showed highly significant positive correlation with number of pods/plant and pod length. Maximum direct effect on seed yield was observed for pod length. There was a wide range of variability in disease reaction among the genotypes. Pea seed borne mosaic virus is basically a disease of pea has been found to be transmitted to lentil. It is suggested that these two crops should not be planted near each other. Therefore, number of pods/plant, pod length, days to maturity and number of seeds/pod was emphasized as primary seed yield.

scholarly journals Inheritance of quantitative traits in opium poppy (Papaver somniferum L.)

Genetika ◽  
2011 ◽  
Vol 43 (1) ◽  
pp. 113-128 ◽  
Author(s):  
H.K. Yadav ◽  
S.P. Singh
Keyword(s):  
Plant Height ◽  
Seed Yield ◽  
Quantitative Traits ◽  
Recurrent Selection ◽  
Breeding Strategy ◽  
Flowering Plant ◽  
Plant Seed ◽  
Allelic Interaction ◽  
Almost All ◽  
Capsule Size

Generation mean analysis was carried out using five parameter model on five cross combinations with five generations i.e. parents, F1s, F2s, and F3s randomly selected from partial diallel breeding experiment. The aim of study was to investigate the mode of gene actions involved in the inheritance of quantitative traits viz. days to 50% flowering, plant height, leaves/plant, capsules/plant, capsule size, capsule weight/plant, seed yield/plant and opium yield/plant. C and D scaling test showed the presence of non allelic interaction in the inheritance for all the traits except for plant height, seed yield/plant (ND1001xIS13) and capsule size (NBR5xND1002) which showed non interacting mode of inheritance. In general, the interaction effect together i.e. additive x additive [i] and dominance x dominance [l] found in higher magnitude than the combined main effects of additive [d] and dominance [h] effects for all the traits in all the five crosses. Dominance effect [h] was found pronounced for most of the traits except days to 50% flowering where additive effect [d] was found prevalent. Among the interaction effects dominance x dominance [l] was predominant over additive x additive [i] for all traits in all the five crosses except capsules/plant and capsule size in cross ND1001xNBRI11 and leaves/plant and opium yield/plant in cross NBRI5xND1002. As per sign of dominance (h) and dominance x dominance (l) duplicate epistasis were noticed for all the traits except plant height and leaves/plant in cross ND1001xUO1285. Potence ratio indicated presence of over dominance for almost all the traits. Substantial amount of realized heterosis, residual heterosis in F2 and F3 progenies and high heritability with moderate to high genetic advance in F2 progeny and significant correlation among important traits in desirable direction were observed. A breeding strategy of diallel selective mating or biparental mating in early segregating generation followed by recurrent selection may be used for genetic improvement.

scholarly journals Genetic Variance Components in Cotton by Generation Mean Analysis

2021 ◽  
Vol 3 (2) ◽  
pp. 72-85
Author(s):  
A. Isong ◽  
A. Balu ◽  
A. Ahmed ◽  
J. O. Mbe ◽  
I. G. Mohammed ◽  
...  
Keyword(s):  
Variance Components ◽  
Quantitative Traits ◽  
Genetic Variance ◽  
Gene Action ◽  
Dominance Effect ◽  
Generation Mean Analysis ◽  
Seed Cotton ◽  
Gene Effects ◽  
Main Effect ◽  
Additive Gene

The mode of gene action for the expression of quantitative traits is decided by the predominance of variances due to additive, dominance and epistasis gene effects. In this experiment, involving four F1 crosses (TCH1716 x TCB37, TCH1705-101 x TCB209, KC2 x TCB26 and TSH0250 x DB3) of upland cotton, inheritance of major yield components by Generation Mean Analysis was investigated. The investigation revealed that both additive and dominance gene effects were involved in the expression of most of the yield contributing traits. One or more types of epistatic interaction effects were prevalent for all the characters and thus played a major role in the control of the characters. The inheritance of the traits was found to be complex in lieu of the low heritability estimates and genetic advance over mean. For seed cotton yield per plant, the dominance x dominance interaction effect was positively significant for all the crosses, the additive x dominance effect was positively significant only in cross 1 and the dominance main effect showed negative significant in all crosses. The dominance (h) and dominance x dominance (l) effects were of opposite signs in all the crosses indicating the presence of duplicate epistasis in all the crosses. To harness additive gene effects for improvement of some of the traits, breeding methods with postponement of selection to later generation should be adopted.

scholarly journals Inheritance of Pod Length and Other Yield Components in Two Cowpea and Yard-Long Bean Crosses

Agronomy ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 682
Author(s):  
Victoria E. Edematie ◽  
Christian Fatokun ◽  
Ousmane Boukar ◽  
Victor O. Adetimirin ◽  
P. Lava Kumar
Keyword(s):  
Seed Yield ◽  
Yield Components ◽  
Model Fitting ◽  
Generation Mean Analysis ◽  
Gene Effects ◽  
Additive Gene ◽  
Cowpea Seed ◽  
Selection For ◽  
Pod Length ◽  
Number Of Seeds

This study determined the gene effects involved in the inheritance of pod length and other yield-related traits and relationships among traits in crosses between two cowpea lines (TVu 2280 and TVu 2027) and a yard-long bean (TVu 6642) line with long pods. Plants of six generations (P1, P2, F1, F2, BC1P1, and BC1P2) derived from TVu 2280 × TVu 6642 and TVu 2027 × TVu 6642 were evaluated under field conditions. Data collected on 14 yield components of each cross were used for generation mean analysis. Gene effects and their magnitudes varied with the crosses; digenic epistatic gene effects were detected for 10 traits in TVu 2280 × TVu 6642 and 11 traits in TVu 2280 × TVu 6642. Only additive gene effect was significant for pod length in TVu 2280 × TVu 6642 while additive, dominant, and two of the three digenic epistatic gene effects were significant in TVu 2027 × TVu 6642. Models that incorporated only significant additive, dominant, and digenic epistasis were adequate for all 14 traits in TVu 2280 × TVu 6642 and eight of the 12 traits in TVu 2027 × TVu 6642 for which model-fitting was possible. Across segregating generation of the two crosses, pod length (PodLNT) was significantly (p < 0.001) correlated with three major yield components viz. pod weight (0.84, 0.77), number of seeds per pod (0.41, 0.30) and seed weight per pod (0.61, 0.29). Significant correlation of PodLNT with seed yield per plant was moderate and significant (p < 0.01–0.001) in the BC1P1 of the two crosses (0.31 and 0.41). An improvement in cowpea seed yield is feasible through selection for long pods in segregating generations involving crosses with yard-long bean.

scholarly journals Generation mean analysis for seed yield and it’s contributing quantitative traits in chickpea (Cicer arietinum L.)

2020 ◽  
Vol 8 (6) ◽  
pp. 172-175
Author(s):  
Mamta Nehra ◽  
RK Panwar ◽  
SK Verma ◽  
Anju Arora ◽  
Rajneesh Bhardwaj ◽  
...  
Keyword(s):  
Cicer Arietinum ◽  
Seed Yield ◽  
Quantitative Traits ◽  
Generation Mean Analysis ◽  
Cicer Arietinum L

scholarly journals ​Generation Mean Analysis for Seed Yield and Its Contributing Traits in the Inter-varietal Cross of Blackgram [Vigna mungo (L.) Hepper]

2021 ◽  
Author(s):  
Tamilzharasi Murugesan ◽  
Kumaresan Dharmalingam ◽  
Thiruvengadam Venkatesan ◽  
Souframanien Jegadeesan ◽  
Jayamani Palaniappan
Keyword(s):  
Genetic Variability ◽  
Seed Yield ◽  
Genetic Model ◽  
Crop Improvement ◽  
Generation Mean Analysis ◽  
Dominance Model ◽  
Improvement Program ◽  
Plant Breeder ◽  
Research Material ◽  
The Mean

Background: Blackgram is being cultivated as an indispensable pulse crop and a rich source of vitamins and minerals. Though the requirement for blackgram is high, the productivity is low. The ultimate aim of any plant breeder in a crop improvement program is to increase seed yield/ productivity. With this background, the current study was focused to investigate genetic variability/effects on important yield and its contributing traits of blackgram. Methods: The research material comprised of P1, P2, F1, F2 and F3 obtained from a cross between CO 6 and LBG 17 varieties in blackgram. Observations on nine biometrical traits were recorded from all these five populations for generation mean analysis. By employing Mather and Jinks (1971) scaling test of C and D, the suitability nature of the simple additive-dominance model can be identified. Following Hayman (1958) perfect fit solution, the mean of five generations (P1, P2, F1, F2 and F3) was utilized to calculate five parameters. Result: Fitted genetic model revealed as important yield and yield contributing traits governed by dominance and epistasis in this study, it indicates the selection may be postponed to later generations with greater homozygosity.

scholarly journals Genetic analysis of nutritional and antioxidant traits in eggplant (S. melongena)

2019 ◽  
pp. 1495-1502
Author(s):  
N. T Afful ◽  
D. Nyadanu ◽  
R Akromah ◽  
H. M Amoatey ◽  
S. Amiteye ◽  
...  
Keyword(s):  
Recurrent Selection ◽  
Dominance Effect ◽  
Block Design ◽  
Pure Line ◽  
Generation Mean Analysis ◽  
Gene Effects ◽  
Randomized Complete Block Design ◽  
High Heritability ◽  
Population Improvement ◽  
Sufficient Variation

Six generations of eggplants (P1, P2, F1, F2, BC1 and BC2) obtained from two crosses SM001-07 x ST004-03 and SM001-07 x San005-01 were grown in an open field using Randomized complete Block Design with four replications. The experiment was conducted to determine gene effects for the inheritance of twelve nutritional and antioxidant traits in eggplant using generation mean analysis. The analysis of variance showed significant differences for most traits indicating the presence of sufficient variation in the eggplant materials under study. Additive-dominance effect was adequate to demonstrate the genetic variation and its significance in the inheritance of protein and magnesium contents, while non-allelic interactions were observed to be important for iron, zinc and total phenol in both crosses. The study also showed low values for dominance and environmental variances that resulted in high heritability values for most traits. Therefore, to improve these traits population improvement approaches (recurrent selection or pure line) followed by delayed selection in segregating generation would yield better results.

STUDY OF EFFECT OF EMS, MMS AND GR ON YIELD CONTRIBUTING TRAITS IN URDBEAN, VIGNA MUNGO

2017 ◽  
Vol 23 (1) ◽  
Author(s):  
A. B. SAGADE
Keyword(s):  
Plant Height ◽  
Seed Yield ◽  
Seed Weight ◽  
Inhibitory Effect ◽  
Individual Plant ◽  
Mean Values ◽  
Methane Sulphonate ◽  
Pod Length ◽  
100 Seed Weight ◽  
Number Of Seeds

The study of the effect of three well known mutagens, ethyl methane sulphonate (EMS), methyl methane sulphonate (MMS) and gamma rays (GR) on the yield contributing traits of the urdbean variety TPU-4 were carried out in the M3 generation. Effect of selected mutagenic treatments/doses of EMS (0.02, 0.03 and 0.04 M), MMS (0.0025, 0.05 and 0.01 M) and (GR) (30, 40 and 50 KR) on different yield contributing traits like plant height, plant spread, number of pods per plant, pod length, number of seeds per pod, seed yield per plant and 100 seed weight were analyzed in the M3 populations of the variety TPU-4. Seeds of M2 plants and control were harvested separately and sown to raise M3 population.. Genetic variabilty in the mutagen administered M3 progeny of the urdbean variety TPU-4 was analyzed by employing statistical methods. Data on mean values and shift in the mean of seven quantitative traits was evaluated on individual plant basis. The experimental findings revealed that concentrations / dose of the all these mutagens showed inhibitory effect on plant height, number of pods per plant, pod length and number of seeds per pod. Lower concentrations of mutagens exerted a promotory effect on plant spread, 100 seed weight and seed yield per plant while higher concentrations of these mutagens inhibited them to different extent.

scholarly journals GENETIC CONTROL OF VARIATION IN A SELECTED POPULATION OF RUSSIAN WILD RYEGRASS (ELYMUS JUNCEUS)

1976 ◽  
Vol 56 (2) ◽  
pp. 275-280
Author(s):  
T. LAWRENCE
Keyword(s):  
Genetic Control ◽  
Seed Yield ◽  
Seed Weight ◽  
Dry Matter ◽  
Recurrent Selection ◽  
Direct Selection ◽  
Adult Plant ◽  
Dry Matter Yield ◽  
Seedling Characters ◽  
Additive Control

Progenies from a five-genotype diallel cross in Russian wild ryegrass, Elymus junceus Fisch., were studied to assess the pattern of genetic control for F1 seed weight and a number of seedling and adult plant characters. Variation in F1 seed weight was largely determined by the maternal parent, but some control by the pollen parent was apparent. Of the seedling characters, days to emerge, rate of leaf appearance, rate of tiller appearance, and seedling dry matter yield, only days to emerge showed additive variance which is amenable to direct selection. The other three characters could be most easily exploited by a recurrent selection program. The adult plant characters, date of inflorescence appearance, P content of the forage, and organic matter digestibility indicated strong additive control which is amenable to direct selection. Dry matter yield and seed yield also showed strong additive control which was accompanied by specific combining ability and weak maternal effects suggesting good progress should be possible by direct selection methods but crossing the selections in a diallel fashion prior to formation of synthetics might be desirable. The seedling characters, rate of leaf and tiller appearance and seedling dry matter yield were interrelated and associated with adult plant yield, thus offering the possibility of screening seedlings for these characters in a recurrent selection program for improved forage or seed yield.

Sign in / Sign up

Export Citation Format

Share Document