scholarly journals Genetic divergence study in salinity stress tolerant maize (Zea mays L.)

2015 ◽  
Vol 39 (4) ◽  
pp. 621-630 ◽  
Author(s):  
A Biswas ◽  
U Sarker ◽  
BR Banik ◽  
MM Rohman ◽  
MA Khaleque Mian
Keyword(s):  
Salinity Stress ◽  
Stress Condition ◽  
Zea Mays L ◽  
Principal Component ◽  
Inbred Lines ◽  
Spad Value ◽  
Significant Difference ◽  
Cluster Distance ◽  
Maize Inbreds ◽  
100 Seed Weight

The study was conducted to investigate the genetic diversity of some maize inbreds under salinity stress condition using Mahalanobis’s statistic (D2) and principal component analysis. Analysis of variance showed significant difference for all the characters. Results of multivariate analysis revealed that seventeen inbred lines formed five clusters at 12 dS level of salinity. The highest intra-cluster distance was recorded in cluster IV containing three genotypes and the lowest was in cluster V having one genotype. The inter cluster D2 values revealed maximum distance among the clusters. The highest inter cluster distance was observed between clusters IV & III and lowest was between V & I. Cluster IV had the highest cluster means for cob height, tassel length, cob length, SPAD value, number of seeds/cob, 100 seed weight, cob diameter and grain yield per plant. Considering cluster distance, inter-genotypic distance, cluster mean and other agronomic performances the genotypes CZ29, CZ33 and P43 from cluster IV and E135, E158, E169, P29 and P45 from cluster III may be considered as better parents for future hybridization programs to obtain desirable segregates in respect of different yield and yield contributing characters under salinity stress. DOI: http://dx.doi.org/10.3329/bjar.v39i4.22540 Bangladesh J. Agril. Res. 39(4): 621-630, December 2014

scholarly journals Genetic diversity of maize (Zea mays L.) Inbreds under salinity stress

2016 ◽  
Vol 40 (4) ◽  
pp. 529-536
Author(s):  
MM Rohman ◽  
BR Banik ◽  
A Biswas ◽  
MS Rahman
Keyword(s):  
Genetic Diversity ◽  
Salinity Stress ◽  
Stress Condition ◽  
Zea Mays L ◽  
Principal Component ◽  
Dry Mass ◽  
Inbred Lines ◽  
Significant Difference ◽  
Cluster Distance ◽  
Maize Inbreds

The study was conducted to investigate the genetic diversity of some maize inbreds under salinity stress condition using Mahalanobis’s statistic (D2) and principal component analysis. Analysis of variance showed significant difference for all the characters. Results of multivariate analysis revealed that twenty five inbred lines formed five clusters at 8 dS level of salinity. The highest intra-cluster distance was recorded in cluster III containing eight genotypes and the lowest was in cluster II having one genotype. The highest inter cluster distance was observed between clusters II & V and lowest was between I & III. Cluster II had the highest cluster means for plant height, cob height, above ground dry mass, cob per plant, cob length, and grain yield per plant. Considering cluster distance, inter-genotypic distance and other agronomic performances the genotypes CZ12, CZ19, CZ26, CZ29, CZ31, CZ32, CZ33 & CML470 from cluster III and CZ27, CZ37, CML251 and CML456 from cluster V may be considered as better parents for future hybridization programs to obtain desirable segregate in respect of different yield and yield contributing characters under salinity stress.Bangladesh J. Agril. Res. 40(4): 529-536, December 2015

scholarly journals GENETIC DIVERGENCE ON QUANTITATIVE CHARACTERS OF EXOTIC MAIZE INBREDS (Zea mays L.)

2015 ◽  
Vol 26 (2) ◽  
pp. 09-14 ◽  
Author(s):  
M. G. Azam Azam ◽  
U. K. Sarker Sarker ◽  
M. A. K. Mian Mian ◽  
B. R. Banik Banik ◽  
M. Z. A. Talukder
Keyword(s):  
Genetic Diversity ◽  
Grain Yield ◽  
Morphological Traits ◽  
Zea Mays L ◽  
Principal Component ◽  
Inbred Lines ◽  
Quantitative Characters ◽  
Cluster Distance ◽  
Ear Height ◽  
Maize Inbreds

Forty nine CIMMYT, India Maize inbred lines were characterized based on some morphological traits and grain yield. Genetic divergences of inbred lines of maize were estimated using D2 and principal component analysis. The genotypes under study fell into five clusters. The inter cluster distance were higher than intra cluster distance suggesting wider genetic diversity among the genotypes of different groups. The maximum intra cluster value was observed in cluster IV and minimum in cluster V. The inter cluster D2 values revealed that the maximum distance among the cluster. The highest inter cluster distance was observed between cluster II & I and the lowest inter cluster distance was illustrated in cluster III & I. The cluster means were higher for days to 50% tasseling, days to 50% sillking, plant height, ear height, cob length, number of rows per cob, number of grains per row in cluster IV; cob diameter and grain yield per plant was found higher in cluster II. It is expected that crossing of inbred lines belonging high to medium D2 values tend to produce high heterosis for yield.

scholarly journals Screening of mungbean (Vigna radiata L. Wilczek) genotypes under nutrient stress in soil

2016 ◽  
Vol 41 (2) ◽  
pp. 377-386
Author(s):  
MA Razzaque ◽  
MM Haque ◽  
MM Rahman ◽  
MM Bazzaz ◽  
MSA Khan
Keyword(s):  
Seed Weight ◽  
Dry Matter ◽  
Stress Condition ◽  
Principal Component ◽  
Dry Mass ◽  
Nutrient Stress ◽  
Agronomic Performance ◽  
Plant Seeds ◽  
Significant Difference ◽  
Cluster Distance

A pot experiment was conducted at the Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur during kharif season of 2010 to investigate the genetic divergence of some mungbean genotypes under nutrient stress condition using Mahalanobis’ statistic (D2) and principal component analysis. Analysis of variance showed significant difference for all the characters. Results of multivariate analysis revealed that 200 mungbean genotypes formed five clusters at nutrient stress condition where cluster II had the maximum genotypes (83) followed by cluster I (65), cluster III (30), cluster IV (9) and then cluster V (13). The highest intra-cluster distance was observed between cluster IV containing lowest 9 genotype and cluster V containing 13 genotypes. The highest inter-cluster distance was observed between cluster IV and III and lowest was observed between cluster V and Cluster I. Cluster III had the highest cluster mean for total dry matter, root dry mass, pods per plant, seeds per pod, 1000 seed weight and seed yield. Considering cluster distance and other agronomic performance the genotypes IPSA 1, IPSA 12, IPSA 5 and others genotypes from cluster III may be considered for better performance under nutrient stress condition.Bangladesh J. Agril. Res. 41(2): 377-386, June 2016

scholarly journals Genetic divergence of exotic inbred lines of maize (Zea mays. L)

2018 ◽  
Vol 42 (4) ◽  
pp. 665-671
Author(s):  
AH Akhi ◽  
S Ahmed ◽  
ANMS Karim ◽  
F Begum ◽  
MM Rohman
Keyword(s):  
Plant Height ◽  
Zea Mays L ◽  
Agricultural Research ◽  
Inbred Lines ◽  
Mean Value ◽  
Morphological Attributes ◽  
Mean Values ◽  
Cluster Distance ◽  
Ear Height ◽  
Total Divergence

Sixty exotic inbred lines of maize from CIMMYT were characterized for a few morphological attributes and grain yield at the experimental field of Bangladesh Agricultural Research Institute (BARI) during 2013-14. The inbred lines of the existing investigation were grouped into five distinct non-overlapping clusters based on D2 analysis. Cluster II was comprised of the highest number of inbreds whilst cluster III and IV included the lowest number of inbreds. The inter cluster distance was higher than intra cluster distance suggesting wider genetic diversity among the genotypes of different groups. The highest inter-cluster distance was exhibited between clusters II and V (D2 = 15.40) and the lowest inter-cluster distance was observed between clusters I and II (D2 = 2.82). Cluster II exhibited the highest mean values for cob length and cob diameter, cluster V for number of grain /cob and total grain weight. The lowest mean value for plant height & ear height were found in cluster II and cluster IV for days to pollen shedding and days to silking. Days to silking, plant height, cob length (cm), number of rows /cob, number of grains /cob showed maximum contribution towards total divergence among different characters. The inbred lines were characterized for their morphological traits and kernel yield to achieve more heterotic partners to get higher heterosis.Bangladesh J. Agril. Res. 42(4): 665-671, December 2017

scholarly journals Diversity Analysis in Biofortified Inbred Lines of Maize (Zea mays L.)

2021 ◽  
pp. 115-123
Author(s):  
Priyanka Jaiswal ◽  
. Banshidhar ◽  
. Banshidhar ◽  
Dan Singh Jakhar ◽  
Rajesh Singh
Keyword(s):  
Seed Weight ◽  
Agricultural Research ◽  
Block Design ◽  
Inbred Lines ◽  
Mean Value ◽  
Randomized Block Design ◽  
Zn Concentration ◽  
Cluster Distance ◽  
100 Seed Weight ◽  
Selection Of

Thirty biofortified inbred lines of maize were evaluated for 11 parameters to study the genetic diversity by using D2 statistics during kharif 2017in Randomized Block Design (RBD) with three replications at Agricultural Research farm, Institute of Agricultural Sciences, BHU Varanasi. In present investigation all genotypes were grouped into ten cluster. Among the different clusters of inbred lines, the cluster II with 8 inbreds emerged as the largest cluster. The intra cluster D2 value ranged from 10.82 to 44.89. The maximum intra cluster distance was observed for cluster X (D2 = 44.89). The maximum inter cluster distance was observed between cluster V and VI (D2 = 180.90) followed by cluster V and VII (D2 = 166.10), cluster IV and V (D2 = 155.60), cluster V and VIII (D2 = 135.02) and cluster I and VI (D2 = 127.66). The maximum contribution towards divergence was due to 100 seed weight (52.18%), thus, estimates of variation in seed weight could be used as a basis for selection of distantly related parents. Highest mean value for grain yield per plant (80.8) and Zn concentration (39.53) were observed in cluster IV, while the highest mean value for 100 seed weight was found in cluster V. Therefore, these clusters prove to be of prime importance for selection of parents in hybridization programme aimed at higher yield along with enhanced grain Zn concentration.

scholarly journals Spermidine Suppressed the Inhibitory Effects of Polyamines Inhibitors Combination in Maize (Zea mays L.) Seedlings under Chilling Stress

Plants ◽  
2021 ◽  
Vol 10 (11) ◽  
pp. 2421
Author(s):  
Canhong Gao ◽  
Mohamed S. Sheteiwy ◽  
Chen Lin ◽  
Yajing Guan ◽  
Zaid Ulhassan ◽  
...  
Keyword(s):  
Zea Mays ◽  
Zea Mays L ◽  
Chilling Stress ◽  
Inbred Lines ◽  
Inhibitory Effects ◽  
Maize Seed ◽  
Adenosylmethionine Decarboxylase ◽  
Combination Treatments ◽  
Significant Difference ◽  
Different Doses

Chilling stress greatly inhibited the seed germination, plant growth, development and productivity in this study. The current research aimed to study the effects of different polyamine (PA) inhibitor combinations (Co), e.g., D-arginine (D-Arg), difluoromethylormithine (DFMO), aminoguanidine (Ag) and methylglyoxyl–bis-(guanyhydrazone) (MGBG) at different doses, i.e., 10 µM Co, 100 µM Co, 500 µM Co, 1000 µM Co and 1000 µM Co + 1 mM Spd (Spermidine) in two inbred lines of maize (Zea mays L.), i.e., Mo17 and Huang C, a sensitive and tolerant chilling stress, respectively. The combination treatments of PA inhibitors reduced the biosynthesis of putrescine (Put) in the tissues of both studied inbred lines. Application with 500 µM Co and 1000 µM Co did not result in a significant difference in Put concentrations, except in the coleoptile of Mo17. However, combining Spd to 1000 μM of PA inhibitors enhanced the Put, Spd, spermine (Spm) and total PAs in the roots, coleoptile and mesocotyls. Put and total PAs were increased by 39.7% and 30.54%, respectively, when Spd + 1000 µM Co were applied relative to their controls. Chilling stress and PA inhibitors treatments affected both inbred lines and resulted in differences in the PA contents. Results showed that enzymes involved in the biosynthesis of PAs (ornithine decarboxylase as ODC and S-adenosylmethionine decarboxylase as SAMDC) were significantly downregulated by 1000 µM Co in the tissues of both inbred lines. In contrast, the activity of PAO, a Pas degradation enzyme, was significantly improved by 1000 µM Co under chilling stress. However, Spd + 1000 µM Co significantly improved the activities of ODC and SAMDC and their transcript levels (ODC and SAMDC2). While it significantly downregulated the PAO activity and their relative genes (PAO1, PAO2 and PAO3) under chilling stress. Overall, this study elucidates the specific roles of Spd on the pathway of PA inhibitors and PA biosynthesis metabolism in maize seed development in response to chilling stress. Moreover, the Huang C inbred line was more tolerant than Mo17, which was reflected by higher activities of PA biosynthesis-related enzymes and lower activities of PAs’ degradative-related enzymes in Huang C.

scholarly journals Multivariate Analysis in Lentil (Lens culinaris L.)

1970 ◽  
Vol 23 (1) ◽  
pp. 9-12 ◽  
Author(s):  
AA Jewel ◽  
AK Chowdhury ◽  
AKMM Alam ◽  
MA Latif ◽  
MM Hassan
Keyword(s):  
Genetic Diversity ◽  
Principal Component Analysis ◽  
Cluster Analysis ◽  
Seed Weight ◽  
Lens Culinaris ◽  
Principal Component ◽  
Plot Yield ◽  
Days To Maturity ◽  
Cluster Distance ◽  
100 Seed Weight

Genetic divergence among 22 genotypes of lentil was estimated using D2 and principal component analysis. The genotypes under study fell into four clusters. The intra-cluster value was the maximum in cluster I and the minimum in cluster II. The inter-cluster distance was larger than the intra-cluster distance in all the cases suggesting the wider genetic diversity among the genotypes of different groups. The inter-cluster value indicated maximum distance between cluster I and II than cluster III and IV. Thus the genetically diverged genotypes of the clusters could be used as parent in hybridization program to get desirable genotypes. Cluster I had the highest mean for days to maturity, plant height, pods/plant and per plot yield while cluster II and III had the highest days to first flowering and 100 seed weight, respectively. Genotypes with these characters in respective groups would, therefore, offer a good scope of improvement of lentil through selection.   Key words: Lentil; cluster analysis; divergence; hybridization DOI: http://dx.doi.org/10.3329/bjpbg.v23i1.9312 BJPBG 2010; 23(1): 9-12

scholarly journals Genetic Divergence among Inbred Lines of Pumpkin (Cucurbita moschata Duch Ex Poir)

2016 ◽  
Vol 29 (2) ◽  
pp. 25-31
Author(s):  
B. Ahmed ◽  
M. A. T. Masud ◽  
M. Zakaria ◽  
M. M. Hossain ◽  
M. A. K. Mian
Keyword(s):  
Genetic Divergence ◽  
Principal Component ◽  
Female Flower ◽  
Inbred Lines ◽  
Mean Value ◽  
Fruit Weight ◽  
Cucurbita Moschata ◽  
Male And Female ◽  
Fruit Length ◽  
Cluster Distance

Genetic divergence among nineteen inbred lines of pumpkin (Cucurbita moschata Duch Ex Poir) was estimated through principal component analysis and Mohalanobis’s D2 analysis. Inbred lines were grouped into five clusters. Cluster I, II, III, IV and V were composed of five, three, four, six and one inbred lines respectively. Maximum inter cluster distance was observed between the cluster III and V (72.69) followed by the cluster I and V (63.33). Minimum inter cluster distance was observed between cluster II and IV (10.64). The mean value of cluster III indicated the importance of days to first male and female flower open, node order to 1st female flower open and TSS.  Cluster IV showed the importance of days to first female flower open, fruit diameter, cavity diameter, flesh thickness and average fruit weight. Similarly, cluster V indicated the importance of yield per plant, fruits per plant and fruit length. Days to first male and female flower open, fruit length and cavity length had the highest contribution towards divergence among the inbred lines. Considering the magnitude of cluster distance, cluster means for different characters and contribution of characters towards divergence, the inbred lines from clusters I, III and IV could be selected as parent for hybridization program.

scholarly journals The Effect of Plant Density on Growth and Yield of Inbred Lines and Hybrids of Corn (Zea mays L.)

2018 ◽  
Vol 26 (8) ◽  
pp. 245-253
Author(s):  
Abd – AlKream Hussain Al-Romi ◽  
Abduallh Fadhal Sarheed ◽  
Rasha Adel Abd Al-Nabi
Keyword(s):  
Grain Yield ◽  
Leaf Area ◽  
Zea Mays L ◽  
Plant Density ◽  
Inbred Lines ◽  
Growth And Yield ◽  
Autumn Season ◽  
Significant Difference ◽  
And Training ◽  
High Range

   A Filed experiment was carried out at the center of the guiding and training agriculture AL-Mahnawia – Babylon during spring season 2015 and autumn season at the same year  growing  six lines (OH40،ZP707،ZP670،IK8،R153 and Dk(to study and evaluation these lines and its hybrids at autumn season 2015 for traits : leaf area ,number of ears ,number of grain .ears-1 , grain yield ,total grain yield, by plating  at (20,25,30)cm .by using RCBD design for three replicates.     The results showed that significant difference among the genotypes, plant density and the interaction among them. The fifth inbred was superior for all study traits leaf area, number of ears, number of grains.ear-1 , grain yield, total grain yield it gives  3466 cm2, 1.10 ear.plant-1. 393.36 grans .ear-1 ,125.45 . gr, plant -1 ,10.6ton.ha-1 at 25 cm it was superior on all the study inbreds by giving a high value of these traits .on another hand the hybrid (R153× IK8 )gave a high range of all study traits 5439 cm2,1.25 aer.plant-1.635.30 gr. Plant-1 10.6 ton. ha-1. The line R153 and the hybrid( R153× IK8 (gave the best interaction.  

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