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

Genetic Diversity in Maize (Zea mays L.) Inbred Lines

2012 ◽  
Vol 10 (1) ◽  
pp. 64-70 ◽  
Author(s):  
M. A. K. Azad ◽  
B. K. Biswas ◽  
N. Alam ◽  
Sk. S. Alam
Keyword(s):  
Inbred Lines ◽  
Mean Values ◽  
High Performing ◽  
Normal Maize ◽  
Maximum Contribution ◽  
Days To Maturity ◽  
Cluster Distance ◽  
Ear Height ◽  
Hybrid Program ◽  
Total Divergence

Thirty yellow inbred lines of normal maize were evaluated for thirteen parameters at the experimental field of Hajee Mohammad Danesh Science and Technology University during 2010-11 to study the genetic divergence using multivariate analysis. The thirty inbreds fell into six distinct clusters. The intra-cluster distances in all the six clusters were more or less low, indicating that the genotypes within the same cluster were closely related. The highest inter-cluster distance was observed between cluster I and cluster IV and the lowest between the cluster II and III. The cluster V and cluster IV contained the highest (9) and lowest (1) number of genotypes, respectively. Cluster VI showed the highest mean values for kernel yield and all the yield contributing traits except days to 50% tasseling and 50% silking. Cluster II had the lowest mean values for ear height and ear length. Days to maturity and ear diameter showed maximum contribution towards total divergence among different characters. Based on medium to high inter-cluster distances, six inbred lines viz. ML06, ML10, ML14, MK19, ML25 and ML26 were selected for hybrid program. Development of hybrids utilizing these genotypes has the chance to obtain higher heterosis with high performing crosses.DOI: http://dx.doi.org/10.3329/agric.v10i1.11066The Agriculturists 2012; 10(1): 64-70

scholarly journals Multivariate analysis in yellow inbred lines of Maize (Zea mays L.)

2015 ◽  
Vol 39 (4) ◽  
pp. 553-561
Author(s):  
M Amiruzzaman ◽  
MN Amin ◽  
M Quadir ◽  
MH Rashid
Keyword(s):  
Inbred Lines ◽  
Kernel Weight ◽  
Canonical Variate ◽  
Mean Values ◽  
High Performing ◽  
Normal Maize ◽  
Cluster Distance ◽  
Ear Height ◽  
Total Divergence ◽  
Kernel Yield

Twenty five yellow inbred lines of normal maize were evaluated for eleven parameters to study the genetic divergence using Mahalonabis’s D2 and Rao ’s canonical variate analysis. The twenty five inbreds fell into five distinct clusters. The intra-cluster distance in all the five clusters was more or less low, indicating the genotypes within the same clusters were closely related. The highest intercluster distance was observed between cluster I and VI and the lowest between the cluster II and III. The cluster IV and V each contained the highest number of genotypes. Cluster V showed the highest mean values for kernel yield and all the yield contributing traits except 1000-kernel weight and cluster II had the lowest mean values for plant and ear height and maturity characters. Days to silking, ear length, number of kernels/row, 1000-kernel weight and kernel yield showed maximum contribution towards total divergence among different characters. Based on medium to high inter-cluster distances, per se performances and desirable traits, fourteen yellow inbred lines viz. BIL 77, BIL 97, CML 287, CML 470, CML 480, CML 486, CZ 2370-22-2, CZ 2370-24-3, CZ 2370-28-2, CZ 23 70-31-3, IPB 911-2, IPB 911-22, IPB 911-36 and IPB 911-50 were selected for future hybridization program. Crossing between these genotypes have the chance to obtain higher heterosis with high performing crosses. DOI: http://dx.doi.org/10.3329/bjar.v39i4.22531 Bangladesh J. Agril. Res. 39(4): 553-561, December 2014

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 Genetic divergence analysis in papaya (Carica papaya L.) Genotypes

2016 ◽  
Vol 41 (4) ◽  
pp. 647-656
Author(s):  
N Ara ◽  
M Moniruzzaman ◽  
Ferdousi Begum ◽  
M Moniruzzaman ◽  
R Khatoon
Keyword(s):  
Genetic Diversity ◽  
Plant Height ◽  
Genetic Divergence ◽  
Carica Papaya ◽  
Agricultural Research ◽  
Research Station ◽  
Plant Weight ◽  
Mean Values ◽  
Fruit Length ◽  
Cluster Distance

The experiment on papaya (Carica papaya L.) consisting of fourteen genotypes from diversd gene pool was conducted at the Regional Agricultural Research Station, Ishurdi, Pabna during April 2013 to May 2014 to study the nature and magnitude of genetic divergence and eventually identification of suitable genotypes for use in breeding program. Multivariate analysis was subjected to assess the genetic diversity and Mahalanobis’ generalized distance (D2) was used to assess the divergence present among the genotypes. The fourteen genotypes were grouped into four clusters. The cluster IV had the maximum genotypes (5) followed by cluster I having 4 genotypes and cluster II having 3 genotypes. Cluster III had the minimum genotypes (2). The inter-cluster distances were greater than intra-cluster distances in all cases, suggesting wider genetic diversity among the genotypes of different groups. The highest intracluster distance was observed in cluster III and the lowest in cluster II. The maximum inter-cluster distance was estimated between clusters I and IV (11.3212), moderate distance between clusters II and IV (9.961) and clusters III and IV (7.568), and that of the lowest between clusters I and III. Cluster III recorded the highest mean values for fruit length, plant height at last harvest, number of fruits/plant, weight of fruits/plant and fruit yield, while cluster IV exhibited the maximum mean values for pulp thickness, plant height at 1st harvest and the second highest mean values for fruit length, fruit breadth and TSS. Therefore, more emphasis should be given on cluster III for selecting genotypes as parents for crossing with the genotypes of cluster IV which may produce new recombinants with desired traits.Bangladesh J. Agril. Res. 41(4): 647-656, December 2016

scholarly journals Genetic divergence of indigenous pummelo genotypes

2016 ◽  
Vol 3 (1) ◽  
pp. 37-43
Author(s):  
Md Sarowar Alam ◽  
Md Sultan Mia ◽  
Md Salim ◽  
Jubair Al Rashid ◽  
Md Saidur Rahman
Keyword(s):  
Genetic Divergence ◽  
Agricultural Research ◽  
Principal Component ◽  
Fruit Weight ◽  
Research Station ◽  
Mean Values ◽  
Cluster Distance ◽  
Minimum Number ◽  
Total Divergence ◽  
And Performance

The genetic divergence was studied in33pummelogenotypes using D2 statistics and principal component analysis at Regional Agricultural Research Station, BARI, Akbarpur, Moulvibazar during 2012 to 2014. The genotypes were grouped into 5 clusters and the maximum number of genotypes was included in cluster IV and V and the minimum number in cluster I. The inter cluster distance in all of the cases were higher than the intra cluster distance indicating wider genetic diversity among the accessions of different groups. The highest inter-cluster distance was observed between cluster I and II followed by cluster II and V and the lowest between III and IV. The highest intra- cluster distance was observed for the cluster II and the lowest for the cluster III. For cluster II, the highest mean values for plant height (6.13m), individual fruit weight (1141.67g), fruit length (13.03 cm) and breadth (13.15 cm), number of segments per fruit (14.41), number and weight of seeds per fruit (123.67 and 50.41g), yield per plant (50.94 kg) were observed. The first axis largely accounted for the variation among the pummelo accessions (26.16%) followed by second axis (18.75%). The first 8 axes accounted 90.56 % of the total variation. The characters individual fruit weight (g) and weight of seeds per fruit (g) showing positive value in both the vectors contributed maximum towards divergence. Considering magnitude of genetic distance, contribution of different traits toward the total divergence, magnitude of cluster means for different traits and performance the genotypes of cluster I, II, and IV may be considered as parents for future hybridization program.Res. Agric., Livest. Fish.3(1): 37-43, April 2016

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 Genetic Diversity In Exotic Maize (Zea mays L.) Hybrids

2013 ◽  
Vol 38 (2) ◽  
pp. 335-341 ◽  
Author(s):  
MA Zaman ◽  
MA Islam
Keyword(s):  
Plant Height ◽  
Genetic Divergence ◽  
Agricultural Research ◽  
Research Station ◽  
Early Maturity ◽  
Mean Values ◽  
Maize Hybrids ◽  
Lattice Design ◽  
Cluster Distance ◽  
The Mean

An experiment in alpha lattice design with three replication including 39 exotic maize hybrids was conducted at the Research farm of Regional Agricultural Research Station, BARI, Ishuardi, Pabna during Rabi season 2010-11 for analysis the genetic divergence in exotic maize hybrids. The genotypes were grouped in to seven clusters. Cluster VI comprised the maximum genotypes (13) indicating overall genetic similarity among them. The minimum genotype (1) was contained in the cluster III and V. The highest inter-cluster distance was observed between cluster V and III followed by cluster I and III and cluster III and VII suggesting wide diversity between them and the genotypes in these cluster could be used in hybridization program for obtaining a wide spectrum of variation among the segregates. The highest intra-cluster distance was observed in cluster VII and the cluster III and V were contained only one genotype and hence, their intra cluster distance was zero. The mean values of cluster IV recorded the highest yield per hectare (11.60 ton/ha) with medium plant height, days to maturity, days to 50% tasseling, silking and shelling percentage. Selection on the basis of plant aspect and ear aspect the genotypes of cluster III ranked first but plant height was high with medium seed size, medium yield, medium shelling percentage and also in late in case of maturity. The mean values of cluster V shown overall medium in case of yield and all yield contributing characters. Qualitative characters contribute maximum towards genetic divergence. Therefore, the genotypes from cluster III, V and VI could be utilized as source materials for getting desirable new recombinants with early maturity and higher yield. Bangladesh J. Agril. Res. 38(2): 335-341, June 2013 DOI: http://dx.doi.org/10.3329/bjar.v38i2.15894

scholarly journals Genetic diversity in maize inbreds under excess soil moisture condition

2017 ◽  
Vol 42 (2) ◽  
pp. 379-385
Author(s):  
M Hoque ◽  
F Akhter ◽  
M Kadir ◽  
S Akhter ◽  
S Ahmed
Keyword(s):  
Genetic Diversity ◽  
Soil Moisture ◽  
Mean Value ◽  
Moisture Condition ◽  
Soil Moisture Condition ◽  
Spad Value ◽  
Cluster Distance ◽  
Ear Height ◽  
Maize Inbreds ◽  
Total Divergence

Genetic diversity study was done in 64 maize inbreds grown under excess soil moisture condition.The genotypes were grouped into eight clusters. It was observed that all intercluster distances were larger than all intracluster distances. Such results indicated that genotypes included within a cluster had less diversity among themselves but wider genetic diversity among the inbreds of different clusters. The highest inter cluster distance was observed between cluster IV & VII followed by IV & V , IV & VIII, II & VII and I & IV. The highest intra cluster distance was noticed in cluster V and the lowest was in cluster VII. The highest yield/plant, cob girth, number of rows/ear, number of grains/plant, SPAD value and number of nodes with brace roots were observed in cluster IV. The lowest mean value for yield/plant yield components and dwarf statured plant were observed in cluster VII. The plant height, ear height,days to 50% tasseling and silking, cob length, cob girth, 100 grain weight and SPAD value contributed considerably to total divergence. The genetically diverged genotypes in these distinct clusters could be used as parents in hybridization program for getting desirable hybrid(s).Bangladesh J. Agril. Res. 42(2): 379-385, June 2017

scholarly journals Studies On Genetic Divergence In Maize (Zea mays) Inbreds

2013 ◽  
Vol 38 (1) ◽  
pp. 71-76 ◽  
Author(s):  
AA Khan ◽  
MR Islam ◽  
KU Ahmed ◽  
ABM Khaldun
Keyword(s):  
Genetic Divergence ◽  
Agricultural Research ◽  
Inbred Lines ◽  
Research Station ◽  
Growth Duration ◽  
Lattice Design ◽  
Single Genotype ◽  
Cluster Distance ◽  
Ear Height ◽  
1000 Grain Weight

Genetic divergence in 17 CIMMYT Maize inbred lines including one check were assessed based on some morphological traits and grain yield using Mahalanobis’ D2-statistics. The experiment was carried out in alpha lattice design with two replications at Regional Agricultural Research Station, Ishurdi Pabna during the winter 2010-2011. The genotypes were grouped into four clusters. The cluster II contained the highest number of lines (6), while the cluster I contained only single genotype. The maximum inter-cluster distance was noticed between the cluster I and IV and minimum between cluster I and II. The highest intra-cluster distance was observed in the cluster IV and lowest in cluster I. The genotypes in the cluster III showed better performances having shorter growth duration, short stature, shortest ear height, better shelling percentage and reasonable yielding ability. It is expected that crossing of inbred lines belonging high to medium D2 values may tend to produce high heterosis for yield. Ear aspect had the greatest contribution to the genetic divergence. Days to pollen shedding, silking, maturity, and 1000-grain weight were found to be responsible for primary differentiation. Bangladesh J. Agril. Res. 38(1): 71-76, March 2013 DOI: http://dx.doi.org/10.3329/bjar.v38i1.15191

scholarly journals Study of Genetic Variability and Diversity in Maize (Zea mays L.) Inbred Lines

2020 ◽  
pp. 31-39
Author(s):  
D. Bhadru ◽  
V. Swarnalatha ◽  
B. Mallaiah ◽  
D. Sreelatha ◽  
M. V. Nagesh Kumar ◽  
...  
Keyword(s):  
Genetic Parameters ◽  
Zea Mays L ◽  
Maize Yield ◽  
Inbred Lines ◽  
Adequate Knowledge ◽  
Wide Range ◽  
Cluster Distance ◽  
Ear Height ◽  
Selection Of ◽  
High Range

The present investigation was aimed to generate adequate knowledge and understanding of the genetic parameters and genetic diversity among the eighteen maize inbred lines which are important for assessing breeding strategies and predicting hybrid performance. A wide range of variability was noticed among the inbred lines under study. Traits like plant height, ear height, grain yield per cob, cob length and number of kernels per row recorded medium to high range of PCV and GCV estimates, heritability and genetic advance as percent of mean. Hence, these traits are important for selection of genotypes to improve maize yield. The cluster II recorded maximum intra cluster distance (60.49) followed by cluster I (43.81). The clusters III, IV, V and IV are solitary clusters. The highest inter cluster distance of 386.89 was observed between the clusters IV and V, followed by cluster I and IV (326.90), clusters I and VI (309.98), cluster II and V (297.76), cluster III and V (239.32) and Cluster I and III (252.68). To develop high heterotic hybrids in maize select of inbreds as lines from cluster I and testers from Cluster III, IV and VI and also from cluster II and clusters III and V will be rewarding.

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