scholarly journals Genectic Variability In Some Maintainer Lines Of Hybrid Rice (Oryza sativa L)

1970 ◽  
Vol 23 (2) ◽  
pp. 35-40
Author(s):  
A Ansari ◽  
MG Rasul ◽  
PL Biswas ◽  
AK Paul ◽  
MH Rahman
Keyword(s):  
Genetic Divergence ◽  
Hybrid Rice ◽  
Block Design ◽  
Agronomic Characters ◽  
Maintainer Line ◽  
Anther Length ◽  
Randomized Complete Block Design ◽  
Eigen Values ◽  
Cluster Distance ◽  
Key Words Rice

Twelve maintainer lines of rice were evaluated for 19 agronomic characters in a randomized complete block design to study the genetic divergence through multivariate analysis. Genotypes were grouped into three different clusters. Cluster I comprised maximum number of genotypes (ten) and II and III contain only single genotype each. PCA showed 70.29% variation against first three eigen values. The highest inter genotypic distance was observed between the genotype BRRI 1B and IR 73328B (2.278) followed by BRRI 3B and IR 68890B (2.229) and the lowest distance was observed (0.752) between genotypes BRRI 10B and IR 78355B followed by the distance (0.920) between genotypes BRRI 3B and IR 58025B. The inter cluster distance was larger than the intra cluster distances. The highest inter-cluster distance was observed between cluster II and III (7.113). The lowest inter-cluster distance was observed between cluster I and II (4.445) followed by cluster I and III (4.509). The inter cluster distances were higher than the intra cluster distances suggesting wider genetic diversity among the genotype of different groups. Among the characters anther length (0.00651), stigma length (0.00150), days to maturity (0.03018), number of tillers per hill (0.07890) and panicle weight (0.12713) were major characters that contribute to the genetic divergence.   Key words: Rice; maintainer line; genotype; genetic divergence; D2DOI: http://dx.doi.org/10.3329/bjpbg.v23i2.9323 Bangladesh J. Pl. Breed. Genet., 23(2): 35-40, 2010

scholarly journals Estimation of Genetic Diversity in Onion (Allium cepa L.)

2016 ◽  
Vol 13 (1) ◽  
pp. 26-34 ◽  
Author(s):  
M S Akter ◽  
A Biswas ◽  
S S Siddique ◽  
S Hossain ◽  
N A Ivy
Keyword(s):  
Genetic Diversity ◽  
Multivariate Analysis ◽  
Plant Breeding ◽  
Allium Cepa ◽  
Genetic Divergence ◽  
Block Design ◽  
Field Laboratory ◽  
Randomized Complete Block Design ◽  
Cluster Distance

The experiment was conducted at the field laboratory of the Department of Genetics and Plant Breeding, Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur during November 2008 to March 2009 to estimate the genetic diversity of exotic and local onion. Ten genotypes of onion were evaluated for 16 characters in a randomized complete block design to study the genetic divergence through multivariate analysis. Ten genotypes formed three clusters. Cluster III contained maximum number of five genotypes. Cluster I and II contained three and two genotypes, respectively. The inter cluster distance was larger than the intra cluster distances. The inter cluster distance was maximum between the cluster II and III (6.336) and minimum between the cluster I and II (3.876). The intra cluster distance in the entire three clusters was more or less low, indicating that genotypes within the same cluster were closely related. Considering clustered distance and cluster mean, the intra cluster distance revealed that the genotypes Indian big (G1) and Patnai pink (G5) from the cluster II and genotypes Taherpuri, Indian medium (G1), Big single bulb (G7), Big double bulb (G8), Small single bulb (G9) and Small double bulb (G10) from the cluster III may be selected as parents for future breeding program.The Agriculturists 2015; 13(1) 26-34

scholarly journals Pengujian Daya Hasil dan Ketahanan Penyakit Hawar Daun Bakteri Tanaman Padi Hibrida

2016 ◽  
Vol 44 (2) ◽  
pp. 126
Author(s):  
Ermelinda Maria Lopes Hornai ◽  
Bambang Sapta Purwoko ◽  
Willy Bayuardi Suwarno ◽  
Dan Iswari Saraswati Dewi
Keyword(s):  
Hybrid Rice ◽  
Phenotypic Diversity ◽  
Block Design ◽  
Leaf Blight ◽  
Bacterial Leaf Blight ◽  
Agronomic Characters ◽  
Male Sterile ◽  
Rice Varieties ◽  
Randomized Complete Block Design ◽  
Blight Disease

ABSTRACT<br /><br />Hybrid rice varieties  is an alternative technology to improve  productivity of low land rice. The results of previous studies have identified and found the male sterile lines Wild Abortive type and Kalinga are resistant to bacterial leaf blight pathotype III, IV and VIII. The objectives of the research were to obtain information on agronomic characters, yield evaluation, genetic parameters, and repeatability information. The experiment was conducted in two locations namely  Muara and Indramayu experimental stations. The design used was a Randomized Complete Block Design with three replication at each site.  Each replicate consisted of 17 hybrid rice and three check varieties. The results from locations showed that genotype BI485A/BP1 (IR53942) has the highest yield of 5.8 ton ha-1. The coefficient of genetic and phenotypic diversity of six agronomic characters was low. The repeatability for seven character observed were low, except for days to flowering. The  scoring value  of bacterial leaf blight disease in Indramayu showed that nine genotypes exhibit resistance.<br /><br />Keywords: cytoplasmic male sterile lines, disease resistance <br /><br />

scholarly journals Evaluation of Yield, Reaction to Diseases, and Grain Physical Attributes of Some Introduced Rice Hybrids in Ghana

2019 ◽  
Vol 2019 ◽  
pp. 1-8
Author(s):  
Samuel Oppong Abebrese ◽  
Alex Yeboah ◽  
Wilson Dogbe ◽  
Paul Kofi Ayirebi Dartey ◽  
Richard Akromah ◽  
...  
Keyword(s):  
Grain Yield ◽  
Yield Components ◽  
Hybrid Rice ◽  
Block Design ◽  
Leaf Blight ◽  
Rice Production ◽  
Bacterial Leaf Blight ◽  
Yield Potential ◽  
Randomized Complete Block Design ◽  
Physical Attributes

Hybrid rice technology is one of the promising, sustainable, and proven technologies for increasing rice production and productivity with a yield advantage of 15–30% over modern inbred varieties. The potential of hybrid rice has so far not been exploited in Ghana. This study was undertaken to evaluate the yield potential, reaction to diseases, and physical grain attributes of some introduced hybrids. The trials were laid out in a randomized complete block design (RCBD) with three replicates across three locations. Data were taken on grain yield, yield components, reaction to diseases, and grain physical characteristics. Four promising hybrids (SWARNA 2, ARGH 1501, ARGH 1502, and ARGH 1503) with a mean yield advantage of 15–20.8% over the best inbred check “AgraRice” were identified. With few exceptions, the hybrids were broadly adapted and had adequate resistance to blast and bacterial leaf blight. Most of the test hybrids had long slender grains which make them acceptable to the Ghanaian market but lacked aroma.

scholarly journals Comparative study of floral characteristics in the component lines of hybrid rice (Oryza sativa L.)

2014 ◽  
Vol 43 (1) ◽  
pp. 1-8
Author(s):  
MJ Hasan ◽  
Umma Kulsum ◽  
MH Rahman ◽  
A Akter ◽  
AKM Shamsuddin
Keyword(s):  
Oryza Sativa ◽  
Hybrid Rice ◽  
Oryza Sativa L ◽  
Floral Traits ◽  
Restorer Line ◽  
Hybrid Seed Production ◽  
Filament Length ◽  
Style Length ◽  
Maintainer Line ◽  
Anther Length

Significant variations were obtained among the component lines for most of the floral traits. BRRI9A exhibited superiority for angle of open florets, stigma length and breadth, anther breadth, filament length, style length and panicle exertion rate while its corresponding maintainer lines BRRI9B showed superiority for duration of open florets, stigma length and breadth, anther breadth and filament length. This indicated BRRI9A and its corresponding maintainer line BRRI9B possessed very good floral traits that influence out crossing. Among the restorer lines BR168R showed superiority for duration of open florets, angle of open florets, duration of bloomed florets/panicle, stigma length, anther length and number of pollen/microscopic focus. This suggested BR168R could be used as promising restorer line with BRRI9A for hybrid seed production in local condition.DOI: http://dx.doi.org/10.3329/bjb.v43i1.19739 Bangladesh J. Bot. 43(1): 1-8, 2014 (June)

scholarly journals GENETIC DIVERSITY OF POTATO (Solanum tuberosum L.)

2016 ◽  
Vol 29 (1) ◽  
pp. 39-43
Author(s):  
M. H. Rahman ◽  
M. S. Islam ◽  
S. Sonom
Keyword(s):  
Solanum Tuberosum L ◽  
Block Design ◽  
Soluble Sugar ◽  
Maximum Performance ◽  
Total Soluble Sugar ◽  
Randomized Complete Block Design ◽  
Cluster Distance ◽  
Percentage Weight ◽  
Number Of Leaves ◽  
Hybridization Programme

The experiment was conducted with twenty one genotypes of potato at the experimental farm of Sher-e-Bangla Agricultural University, Dhaka during the period from November 2014 to March 2015 to estimate the genetic variability and diversity among the genotypes. The experiment was conducted using Randomized Complete Block Design with three replications. All the genotypes varied significantly with each other for all the studied characters indicated the presence of considerable variations among the genotypes studied As per PCA, D2 and clusters analysis the genotypes were grouped into five different clusters. Clusters III had the maximum nine and cluster II and V had the minimum one genotype. The highest inter-cluster distance was observed between I and V and the lowest was observed between IV and V. Genotypes in cluster I showed the maximum performance for number of leaves per plant, chlorophyll percentage, weight of individual potato and firmness. Cluster II showed maximum performance for total soluble sugar. Cluster III recorded the highest mean performance for dry matter. Cluster IV showed the maximum performance for number of potato per hill, weight of potato per hill and yield. Cluster V showed the maximum performance for specific gravity. Considering this idea and other characteristic performances, G8 (Shada pakri) and G17 (Shil bilati) from cluster IV; G4 (BARI-TPS-1) from cluster II; and G6 (Asterix), G21 (Granola) , G1 (Cardinal) and G2 (Diamant) from cluster I might be considered better parents for efficient hybridization programme.

scholarly journals Genetic Divergence Analysis of Rice Genotypes under Salt Stress Environment

2020 ◽  
pp. 33-39
Author(s):  
Anuj Kumar ◽  
D. K. Dwivedi ◽  
Pradeep K. Bharti ◽  
Shivani . ◽  
Preeti Kumari ◽  
...  
Keyword(s):  
Salt Stress ◽  
Normal Condition ◽  
Genetic Divergence ◽  
Block Design ◽  
Stress Conditions ◽  
Saline Condition ◽  
Randomized Block Design ◽  
Cluster Distance ◽  
Rice Genotypes ◽  
Cluster 2

The present investigations were conducted in randomized block design with three replications within the net house of the department of PMB&GE, A. N.D.U.A.T, Kumar Ganj, Ayodhya to estimate the genetic divergence under normal and salt stress conditions involving 20 rice genotypes during Kharif 2018-19, on the basis of relative parameters of D2 values, the clustering pattern of 20 rice genotypes under normal and salt stress conditions were grouped into five non-overlapped clusters. Under normal condition, Cluster III having highest 7 rice genotypes, Cluster II having 5 genotypes, cluster V having 4 genotypes and IV having highest 3 rice genotype. Cluster I having only one genotype. Under saline condition, Cluster I having highest rice 6 genotypes, cluster III having 5 genotypes and cluster II & IV having 4 genotypes respectively. Cluster V having only one genotype. It means the genetic similarity was found in the genotypes were expressed within the cluster and the pattern of distribution of genotypes in various clusters exhibited that topographical diversity wasn't associated with ancestral diversity as genotypes of same countryside were grouped into different cluster and vice-versa. The highest inter cluster distance was recorded between cluster 2 and cluster 5 (26108.030) followed by between cluster 1 and cluster 5 (18550.010), cluster 3 and cluster 5 (15231.860), cluster 4 and cluster 5 (5335.860) in normal condition and in saline condition the maximum inter cluster distance was existed between cluster 4 and cluster 5 (2344.091) followed by between cluster 3 and cluster 5 (2067.610), cluster 2 and cluster 5 (1447.564), cluster 1 and cluster 5 (1238.095). The results showed extensive variation from one cluster to other in respect of cluster means for all parameters, which represented that genotypes having distinctly different mean performance for various characters were reported into different clusters.Rice

scholarly journals Korelasi Hasil dan Komponen Hasil Padi Hibrida di Dua Lokasi Pengujian

2017 ◽  
Vol 1 (1) ◽  
pp. 11
Author(s):  
Nita Kartina
Keyword(s):  
Grain Yield ◽  
Selection Criteria ◽  
Hybrid Rice ◽  
Block Design ◽  
Yield Component ◽  
Path Coefficient ◽  
Central Java ◽  
Randomized Complete Block Design ◽  
Rice Genotypes ◽  
Materials Used

<p>One of the objectives in rice breeding is to increase grain yield. The research was to evaluate numbers of hybrid rice genotypes and also to obtain the information about grain yield correlation main, grain yield component from numbers of hybrid rice genotypes and influencial character as selection criteria. The experiment conducted in the second season (MT II) of 2013 at Cilacap, Central Java province and in Malang, East Java province by using Randomized Complete Block Design (RCBD) with four replications. The genetic materials used were 18 hybrid rice genotypes and two check varieties namely Hipa8 and Ciherang. The results showed that grain yield had been effected by location, genotypes and both interactions. Hipa8 give yield average 9 t/ha while Ciherang 8.78 t/ha. There were two hybrid rice genotypes have equal yield statitistically with both check varieties. The hybrids were A7/BH25B-1B(9.13 t/ha) and IR58025A/CRS516 (9.15 t/ha). Based on path analysis numbers of empty grain, seed set, plant high and number of productive tillers have direct effect to yield with path coefficient of 0.0437; 0.3114; 0.,1952 and 1.931.These characters could be used as selection criteria.</p>

scholarly journals Genetic variability and yield components of yard long bean (Vigna unguiculata var. sesquipedalis L.)

2021 ◽  
Vol 82 (3) ◽  
pp. 107-122
Author(s):  
Zakia Sultana ◽  
Nahid Ahmed ◽  
Mohammad Saiful Islam ◽  
Abdur Rahim
Keyword(s):  
Genetic Variability ◽  
Vigna Unguiculata ◽  
Block Design ◽  
Pod Yield ◽  
Randomized Complete Block Design ◽  
Days To Maturity ◽  
Cluster Distance ◽  
High Heritability ◽  
Positive Effect ◽  
Pod Number

Yard long bean (Vigna unguiculata var. sesquipedalis L.) is one of the important leguminous vegetables in Bangladesh. However, yield of this vegetable is much lower in Bangladesh compared to other yard long beangrowing countries. Therefore, it is crucial to improve the yield of this vegetable. In the present study, genetic variability, heritability, character association and genetic diversity were evaluated on randomized complete block design with three replications among seven-yard-long bean genotypes. The genotypes were significantly variable for the studied characters. High genotypic and phenotypic coefficient of variation was observed in number of pods per plant and pod yield per plant. Accordingly, high heritability together with high genetic advance in percent of mean was observed in number of pod per plant, pod diameter and hundred seed weight. The correlation studies revealed that pod yield per plant showed significant positive correlation with number of seed per pod, number of pods per plant while significantly negative correlation with days to marketable harvest at both genotypic and phenotypic level. Path analysis revealed days to first flowering, days to maturity, number of pods per plant, pod weight and number of seeds per pod had direct positive effect on pod yield per plant. The studied genotypes were clustered into 3 groups with highest of inter-cluster distance between cluster I and III while lowest between cluster II and III. The genotypes of cluster I exhibited higher mean performance while lower in cluster III for important traits including pod yield per plant.

scholarly journals IDENTIFICATION OF WIDE COMPATIBILITY VARIETIES IN SOME TROPICAL JAPONICA RICE

2013 ◽  
Vol 6 (1) ◽  
pp. 28 ◽  
Author(s):  
A. Hairmansis ◽  
Hajrial Aswidinnoor ◽  
Trikoesoemaningtyas Trikoesoemaningtyas ◽  
Suwarno Suwarno
Keyword(s):  
Hybrid Rice ◽  
Block Design ◽  
Hybrid Sterility ◽  
Japonica Rice ◽  
Rice Varieties ◽  
Major Barrier ◽  
F1 Hybrid ◽  
Tropical Japonica ◽  
Wide Compatibility ◽  
Randomized Complete Block Design

The F1 hybrid sterility in indica/japonica crosses is the major barrier in developing hybrid rice varieties between these two diverse germplasm. The sterility problem in japonica/indica hybrids can be overcome by using wide compatibility genes. The objective of this study was to identify wide compatibility varieties (WCVs) in some tropical japonica rice. Twenty five tropical japonica varieties as male parents were crossed with indica (IR64) and japonica (Akitakomachi) testers as female parents. The crosses were planted following a randomized complete block design with three replications. Varieties having average spikelet fertility of more than 70% with both the indica and japonica testers were rated as WCVs. Result from this study showed that six tropical japonica varieties were classified as WCVs, i.e., Cabacu, Grogol, Kencana Bali, Klemas, Lampung Lawer, and Napa. Hybrid sterility is caused by partial sterility of male and female gametes. The WCVs from the present study can be used in hybrid rice breeding program to solve hybrid sterility in indica/japonica hybrids.

scholarly journals Evaluation of Genetic Divergence Analysis in Tomato (Solanum lycopersicom [Mill] Wettsd)

2020 ◽  
pp. 249-254
Author(s):  
Mahendra Kumar Yadav ◽  
G. C. Yadav ◽  
Nishakant Maurya ◽  
Bankey Lal ◽  
Vipul Pratap Singh ◽  
...  
Keyword(s):  
Genetic Divergence ◽  
Block Design ◽  
Randomized Block Design ◽  
Major Cluster ◽  
Geographic Diversity ◽  
Cluster Distance

The present investigation was carried out to estimate the genetic diversityfor11 yield contributing traits among 50 genotypes of tomato (Solanum lycopersicom [Mill.] Wettsd.) during 2017 in Randomized Block Design with three replications. In this context maximum intra cluster distance was recorded within cluster III and inter cluster distance was recorded between cluster I to V III. Cluster III had maximum number of genotypes. Major cluster in divergence analysis contained genotypes of heterogeneous origin, thereby indicating no parallelism between genetic and geographic diversity. Therefore, crosses between members of clusters separated by high inter- cluster distance are likely to produces desirable segregates.

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