scholarly journals Analisis Heritabilitas dan Sidik Lintas Karakter Vegetatif dan Generatif

Buletin Palma ◽  
2016 ◽  
Vol 16 (1) ◽  
pp. 93
Author(s):  
. MIFTAHORRACHMAN ◽  
EMY SULISTYOWATI
Keyword(s):  
Path Analysis ◽  
Block Design ◽  
Leaf Length ◽  
Path Coefficient ◽  
Open Pollination ◽  
Font Size ◽  
Pollination System ◽  
Controlled Pollination ◽  
Self Pollination ◽  
Female Flowers

<p><span style="font-size: medium;">ABSTRAK </span></p><p>Keragaman komponen seleksi yang berpengaruh terhadap kecepatan berbunga dan produksi buah kelapa Genjah Salak <br /> belum banyak diketahui. Penelitian bertujuan mendapatkan metode penyerbukan dalam peningkatan produktivitas <br /> kelapa Genjah Salak dengan menghitung heritabilitas tiga belas karakter vegetatif dan generatif yang berkaitan langsung <br /> atau tidak langsung dengan produksi buah. Penelitian dilakukan di Kebun Percobaan Paniki, Manado, Sulawesi Utara, <br /> dari 2011 sampai 2014, menggunakan rancangan acak kelompok, tiga perlakuan dan empat ulangan.  Perlakuan terdiri <br /> atas tiga sistem penyerbukan, yaitu penyerbukan sendiri (full sib), penyerbukan terkendali (half sib) dan penyerbukan <br /> alami (open pollination). Tiga belas karakter yang diukur adalah tinggi batang, lingkar batang, jumlah bekas daun, jumlah <br /> daun, panjang daun, panjang petiole, jumlah anak daun, panjang anak daun, jumlah tandan, jumlah spikelet, jumlah <br /> bunga betina, kecepatan berbunga, dan jumlah buah per tandan. Analisis heritabilitas menggunakan rumus Singh dan <br /> Chaudary. Analisis sidik lintas mengacu pada metoda matriks Singh dan Chaudary. Kelapa Genjah Salak dengan sistem <br /> penyerbukan sendiri memiliki waktu berbunga 34,74 bulan dan tinggi batang 51,75 cm, lebih baik dibandingkan dengan <br /> kelapa Genjah Salak yang menyerbuk terkendali (waktu berbunga 35,99 bulan; tinggi batang 52,51 cm) dan penyerbukan <br /> alami (waktu berbunga 36 bulan; tinggi batang 56,76 cm). Nilai heritabilitas pada kelapa Genjah Salak menyerbuk <br /> sendiri yang berkorelasi langsung dengan karakter hasil adalah tinggi batang (r = 0,383; h2 = 84,0%), jumlah bekas daun <br /> (r = 0,442; h2 = 63,0 %), dan jumlah bunga betina (r = 0,344; h2 = 75,0%).  Metode terbaik untuk meningkatkan produk-<br /> tivitas kelapa Genjah Salak adalah dengan sistem penyerbukan sendiri karena memiliki nilai heritabilitas tinggi dan <br /> berkorelasi langsung dengan karakter hasil.</p><p>Kata kunci: Heritabilitas, koefisien sidik lintas, sistim penyerbukan, kelapa Genjah Salak.</p><p> </p><p>Heritability and Path Analysis on Vegetative and Generative Characters of Salak Dwarf Coconut Generated from Three Pollination System  </p><p><span style="font-size: medium;">ABSTRACT </span></p><p>The diversity of Salak Dwarf components that can be used as a criterion of selection affecting the rate of flowering and yield have not been investigated. The research aims to obtain the best method of pollination in improvement of Salak dwarf coconut productivity by calculating the heritability of thirteen vegetative and generative characters. Twelve characters attributed to the production of fruits were investigated.  The research was arranged in a randomized block design with three pollination system as the treatments, four replications, conducted at the Paniki Experimental Garden, North Sulawesi, from 2011 until 2014.  Treatments consisted of self-pollination system (full sib), controlled pollination system (half sib) and open pollination system. Thirteen characters measured were stem height, girth of stem, number of leaf scars, number of leaves, leaf length, petiole length, number of leaflets, length of leaflet, number of bunches, number of spikelet, number of female flowers, day of flowering, and number of fruit per bunch. Analysis of heritability using the formula of Singh and Chaudary. Path coefficient analysis using matrix model by Shing and Chaudary. Salak dwarf coconut with self-pollination system has better effect of  rate of flowering (34.74 month), and height of stem (51.75 cm) compared to the salak dwarf coconut with controlled pollination (rate of flowering 35.99 months; height of stem 52.51 cm) and Salak dwarf coconut with open pollination (rate flowering 36 months; height of stem 56.76 cm). To improve the productivity of Salak dwarf coconut, the best method of pollination is self-pollinated.  Heritability value on self-pollinate of Salak dwarf coconut which correlates directly with the character of yield was the height of stem (r =0.383; h2=84.0%),  the number of leafscars (r =0.442; h2=63.0%), and the number of female flowers (r =0344; h2=75.0%). The best method to increase the productivity of Salak dwarf coconut through self pollination since it has high heritability values and correlates directly with the character of yield.</p>Keywords : Heritability, coefficient of path analysis, pollination systems, salak dwarf coconut.

scholarly journals Korelasi Karakter Vegetatif dan Generatif Terhadap Produksi

Buletin Palma ◽  
2016 ◽  
Vol 16 (1) ◽  
pp. 104
Author(s):  
WEDA MAKARTI MAHAYU ◽  
. MIFTAHORRACHMAN
Keyword(s):  
Path Analysis ◽  
Fruit Production ◽  
The Other ◽  
Experimental Result ◽  
Fourth Generation ◽  
Open Pollination ◽  
Font Size ◽  
Stem Height ◽  
Self Pollination ◽  
Vegetative Characters

<p><span style="font-size: medium;">ABSTRAK </span></p><p>Analisis sidik lintas dibutuhkan untuk membantu pelaksanaan seleksi tanaman terhadap karakter yang bersifat poligenik (hasil atau komponen hasil) dengan mempertimbangkan karakter-karakter lain yang berkorelasi nyata. Penelitian ini bertujuan untuk mengetahui karakter vegetatif dan generatif yang berpengaruh nyata terhadap produksi  kelapa Dalam Mapanget (DMT) generasi selfing sebagai dasar  melakukan seleksi pohon induk untuk perakitan kelapa  unggul hibrida dan mengetahui pengaruh penyerbukan (penyerbukan terbuka dan silangdalam) terhadap korelasi antar  karakter pada populasi yang terbentuk. Pengamatan dilakukan terhadap kelapa DMT bersari bebas (DMT OP 32 dan  DMT OP 55) dan DMT hasil penyerbukan sendiri (DMT S3-32, DMT S4-32, DMT S3-55, dan DMT S4-55). Analisis sidik  lintas dilakukan pada karakter tinggi batang, lingkar batang 150 cm, jumlah daun dan jumlah tandan. Hasil analisis  menunjukkan bahwa tidak terdapat karakter yang berkorelasi nyata baik secara langsung maupun tidak langsung pada kelapa DMT OP-32, sedangkan pada kelapa DMT OP-55 karakter jumlah tandan memiliki pengaruh langsung terbesar  terhadap peningkatan produksi buah per tandan. Karakter tinggi batang Kelapa DMT S3-32 dan DMT S3-55 memiliki sumbangan terbesar terhadap peningkatan produksi buah per tandan pada kedua aksesi tersebut. Jumlah daun  berkorelasi nyata secara langsung terhadap produksi buah per tandan pada DMT S4-32. Tinggi batang, lingkar batang  150 cm dan jumlah daun kelapa DMT S4-55 berkorelasi nyata secara langsung dengan produksi buah per tandan. Kelapa DMT 32 dan DMT 55 silangdalam generasi ke tiga dan ke empat menunjukkan hubungan antar karakter yang lebih erat  dibanding populasi DMT hasil penyerbukan terbuka yang dibuktikan oleh jumlah karakter yang berkorelasi nyata baik secara langsung maupun total terhadap produksi buah yang lebih banyak.</p><p>Kata kunci: Analisis sidik lintas, penyerbukan terbuka, silangdalam, karakter vegetatif, karakter generatif.</p><p> </p><p> </p><p>Correlation on Vegetative and Generative to Production of the Six Mapanget Tall Coconuts Due Self Pollination</p><p><span style="font-size: medium;">ABSTRACT </span></p><p>Path analysis was needed to assist the implementation of the crops selection on polygenic character (yield or yield  components) with considering to the other characters that significantly correclated. This study aims to determine vegetative and generative characters impact on production of Mapanget Tall Coconut (MAT) significantly in selfing  generation as the basic for selecting the parent tree to assemble superior coconut hybrid and to determine the effect of  pollination types (open-pollinated versus selfing) on the relationship among characters in the formed population.  Observations were conducted on the open pollinated (MAT OP 32 and MAT OP 55) and self-pollination of MAT (MAT  S3-32, MAT S4-32, MAT S3-55, and MAT S4-55). Path analysis was applied on characters of stem height, girth of 150 cm  stem, number of leaf and number of bunches. Experimental result showed that there was no correlation either directly or  indirectly among characters on MAT coconut OP-32, on the other hand MAT OP-55 number of bunches character had  the largest direct influence on increasing production of fruit per bunch. Character of stem height in Coconut MAT S3-32  and S3-55 has the largest contribution to increase fruit production in both accession. Number of leaf character significant correlated directly with fruit per bunch production in MAT S4-32. There were three characters directly correlated with  fruit per bunch production in MAT S4-55, namely stem height, stem girth of 150 cm and number of leaf. The third and fourth generation of MAT coconut show more closely relationships among characters than open-pollination of MAT  populations, proven by the number of characters which had significant correlated as directly ever totally to produce more number of fruits.</p><p>Keywords: Path analysis, open pollination, selfing, vegetative characters, generative characters.</p>

scholarly journals Path analysis of yield components in tropical pumpkin

1969 ◽  
Vol 90 (3-4) ◽  
pp. 183-191
Author(s):  
Miguel Espitia-Camacho ◽  
Franco A. Vallejo-Cabrera ◽  
Diosdado Baena-Garcia ◽  
Linda Wessel-Beaver
Keyword(s):  
Path Analysis ◽  
Indirect Effects ◽  
Block Design ◽  
Genetic Correlations ◽  
Fruit Weight ◽  
Residual Effects ◽  
Path Coefficient ◽  
Direct Effects ◽  
Randomized Complete Block Design ◽  
Effect On Yield

Path coefficient analysis was carried out in tropical pumpkin (Cucurbita moschata Duchesne) for yield per plant as a function of number of fruit per plant and weight per fruit, using phenotypic and genetic correlations from two diallels: one using five varieties (variety diallel) and a second using five S1 lines derived from the varieties (line diallel). A randomized complete block design with five replications was used to evaluate 15 genotypes from each diallel, not including reciprocals. Direct effects were 300 to 500% greater than indirect effects in the line diallel. In contrast, direct effects were only 17 to 68% greater than indirect effects in the variety diallel. Effects (direct and indirect) were greater (17 to 500%) when genetic correlations rather than phenotype correlations (42 to 440%) were used in the path analysis. Fruit weight showed a greater effect on yield than did number of fruit, with values between 3.2 to 4.9 times the residual effects. Fruit weight and number of fruit can be used as selection criteria to increase yield in tropical pumpkin.  

scholarly journals Development of Selection Criteria on Bean Weight Character of Cocoa (Theobroma cacaoL.) through Path Analysis Approach

2013 ◽  
Vol 29 (3) ◽  
Author(s):  
Indah Anita Sari ◽  
Agung Wahyu Susilo
Keyword(s):  
Genetic Variation ◽  
Path Analysis ◽  
Selection Criteria ◽  
Block Design ◽  
Dry Weight ◽  
Variation Coefficient ◽  
Path Coefficient ◽  
Genetic Progress ◽  
Pod Number ◽  
Bean Weight

Path coefficient analysis is frequently used for development of selection criteria on various type of plants. Path analysis on this research was conducted to find the selection criteria of yield component which directly affect bean weight. In addition to the value of path analysis coefficient, genetic variation coefficient, heritability and the value of genetic progress were also studied. The study was conducted at the Indonesian Coffee and Cocoa Research Institute. The research used randomized complete block design consisting of 14 accession numbers and each consisting of three replications. Pod girth, pod length, pod weight, wet beans weight per pod, number of normal beans per pod, number of abnormal beans per pod, dry weight per normal bean, and shell content were observed. The results showed that the pod weight character had an important role in determining the dry weight of normal bean. The character had a positive genotype correlation coefficient values which was high and significantly different (r=0.46) for dry weight per normal bean, considerable direct influence (P=0.479), moderate of the genotype variation coefficient (9.6%), and high genetic progress (95.23). Character of wet bean weight per pod could also be used indirectly for the selection criteria for dry weight per normal bean based on genetic variation coefficient value (11.88%), genetic progress value (82.48), and direct effect on dry weight per normal bean had positive value (P=0.006). Key words: Selection criteria, dry weight per bean, path analysis,Theobroma cacaoL.

scholarly journals Correlations and path analysis of peanut traits associated with the peg

2011 ◽  
Vol 11 (1) ◽  
pp. 88-95 ◽  
Author(s):  
Lucas Nunes da Luz ◽  
Roseane Cavalcanti dos Santos ◽  
Péricles de Albuquerque Melo Filho
Keyword(s):  
Path Analysis ◽  
Block Design ◽  
Reproductive Efficiency ◽  
Path Coefficient ◽  
Stem Height ◽  
Randomized Block Design ◽  
Advanced Line ◽  
Selection For ◽  
Lower Plant ◽  
Selection Of

By correlation and path-coefficient analysis, the most relevant traits for selection for peanut pod yield were identified among the following: total number of pegs (TNP), number of pegs in the lower third of the plant (NPLTh), number of mature pods (NMP), main stem height (MSH), and reproductive efficiency (EF1 and EF2). The trial consisted of 15 F2:3 progenies derived from a cross of variety BR 1 and the advanced line CNPA 280 AM, evaluated in a randomized block design with three replications. The lines with best reproductive efficiency were L.8 and L.11. Path analysis detected a strong direct effect of the number of pegs in the lower plant third on the number of mature pods. This finding justifies the use of the number of pegs in the lower plant third in selection of peanut populations for number of mature pods.

scholarly journals Genetic parameter and correlation estimates of processing traits in half-sib progenies of tropical-adapted carrot germplasm

2012 ◽  
Vol 30 (1) ◽  
pp. 7-11 ◽  
Author(s):  
Jairo V Vieira ◽  
Giovani Olegario da Silva ◽  
Leonardo S Boiteux
Keyword(s):  
Path Analysis ◽  
Recurrent Selection ◽  
Block Design ◽  
Genetic Parameter ◽  
Federal District ◽  
Leaf Length ◽  
Carotenoid Content ◽  
Root Tip ◽  
Crown Shape ◽  
Positive Direct

The estimate of the genetic parameters associated with processing (fresh-cut) traits, including root length (RL), is crucial for carrot breeding programs in tropical areas. The cultivar Alvorada is an important germplasm due to its resistance to nematodes, leaf blight, heat-tolerance, and high carotenoid content. Seventy-four 'Alvorada' half-sib progenies were evaluated during the summer of 2005 in the Federal District, Brazil, in a randomized complete block design with three replications. Thirteen competitive plants in each block were randomly selected and evaluated and/or classified for RL and for number of leaves (NL), leaf length (LL), root tip type (RT), root mass (RW), crown shape (CS), root diameter (RD), and xylem diameter (XD). The Pearson's correlation coefficients and the heritability values were estimated for all traits. The path analysis was also used considering the RL trait as dependent variable. The heritability for RL ranged from 12 to 44%. For the other traits, the values ranged from 3% (RD) to 79% (LL). Phenotypic and genotypic correlations among all traits were low to intermediate. Path analysis indicated positive direct relationship between RL and RW, whereas RD and XD displayed negative direct effect on RL. Longer roots had narrow diameter and narrow XD. Recurrent selection based upon either half-sib or S1 families would be more effective than mass phenotypic recurrent selection in increasing RL and to develop populations expressing multiple desirable processing traits in tropical-adapted carrot germplasm.

scholarly journals Effects of self and cross pollination on fruit set and fruit quality of sour cherry cultivars

2010 ◽  
Vol 16 (1) ◽  
Author(s):  
M. Ansari ◽  
G. H. Davarynejad ◽  
J. Tornyai ◽  
J. Nyéki ◽  
Z. Szabó ◽  
...  
Keyword(s):  
Fruit Quality ◽  
Sweet Cherry ◽  
Fruit Set ◽  
Block Design ◽  
Fruit Size ◽  
Sour Cherry ◽  
Soluble Solids ◽  
Open Pollination ◽  
Self Pollination

An experiment conducted using factorial based on randomized completely block design during 2005 and 2006. Flowers of Érdi bőtermő, Érdi jubileum and Cigány meggy before anthesis and in balloon stages were isolated with paper bags from guest pollens and pollinated in appropriate time. The averages of final fruit set showed the advantage of open pollination (14.6% fruit set) in compare with artificial self pollination (13.0% fruit set) and natural self pollination (4.4% fruit set). Siah mashhad sweet cherry cultivar with more than 70% overlap of flowering and 9.8% fruit set in 2005 and 17.9% in 2006 was the best among applied pollinisers for Érdi bôtermô sour cherry cultivar.Also, Siah mashhad sweet cherry with more than 50%overlap of flowering time and 25.8%fruit set was the best polliniser for Cigány megg. Among the pollinisers, Siah mashhad was the best for Érdi jubileum with more than 50% overlap and 15.22% fruit set. Meanwhile, pollens of Siah mashhad caused the increase of fruit size in Cigány meggy cultivar. phenomenon. Pollens of Siah mashhad caused reduction in total soluble solids of Érdi bôtermô fruits, however, it does not have any significant effect on the acid rate of fruits.

scholarly journals Correlation and Path Coefficient Analysis of Kopyor Dwarf Coconut (Cocos nucifera L.)

CORD ◽  
2017 ◽  
Vol 33 (1) ◽  
pp. 15
Author(s):  
Miftahorrachman ◽  
Sukmawati Mawardi ◽  
Hengky Novarianto3
Keyword(s):  
Path Analysis ◽  
Cocos Nucifera ◽  
Block Design ◽  
Morphological Characters ◽  
Fruit Production ◽  
Yellow Dwarf ◽  
Path Coefficient ◽  
Brown Dwarf ◽  
High Genetic Diversity ◽  
Randomized Block Design

Breeding programs of kopyor dwarf coconut require a population base with high genetic diversity especially for characters that relate to fruit production. The study aims to determine the appearance of three kopyor dwarf coconuts from Pati District and correlations among 13 characters of Kopyor Green Dwarf, Kopyor  brown dwarf, and Kopyor Yellow Dwarf and to study twelve vegetative and generative  characters which directly and indirectly affect the number of fruits. The study was conducted at The Paniki Experimental Garden, North Sulawesi, Indonesia from August 2015 to February 2016. The design used was randomized block design with three treatments and three replications. Observed thirteen characters including number of bunches (NB), number of fruit (NF), number of leaves (NL), number of leaflets (NLL), width of leaflets (WLL), length of the leafleats (LLL), length of petiole (LP), width of petiole (WP), thick of petiole (TP), length of rachis (LR), length of leaf (LL), height of stem (HS), and girth of stem (GS). Path analysis among morphological characters to number of fruits was worked out using the formula of Singh and Chaudary. Results of variance analysis showed Kopyor Green Dwarf and Kopyor Brown Dwarf significantly differed from Kopyor Yellow Dwarf. Results of simple correlation analysis found no correlation among twelve characters with number of fruits for the three  kopyor dwarf coconut, but the results of the path analysis of characters NL (r=0.5627), NLL (r=0.5920), HS (r=0.4861), and GS (r=0.6123) for the Kopyor Green Dwarf; NB (r=0.4241), LP (r =0.6390) , WP (r = 0.8705), LR (r = 0.5235), and LL (r = 0.6257) for the Kopyor  Brown Dwarf; and WLL (r = 0.8413), LLL (r = 0.5617), TP (r = 0.5864), LR (r =1.5795), and LL (r = 1.0228) for the Kopyor Yellow Dwarf directly affect the number of fruits. These characters can be used for basic selection in breeding of kopyor coconut.

scholarly journals Trait Association and Path Coefficient Analysis for Yield Traits in Myanmar Sesame (Sesamum indicum L.) Germplasm

2019 ◽  
pp. 1-10
Author(s):  
Myint Aye ◽  
Nyo Mar Htwe
Keyword(s):  
Path Analysis ◽  
Plant Height ◽  
Seed Yield ◽  
Seed Weight ◽  
Block Design ◽  
Flowering Plant ◽  
Phenotypic Correlation ◽  
Path Coefficient ◽  
Yield Attributes ◽  
Positive Direct

The experiment was conducted in randomized complete block design with three replications during the dry season, 2014 at Yezin Agricultural University, Myanmar to determine the extent of genetic variability for important yield attributes and to determine interrelationship among the traits and their direct and indirect effects on yield of forty Myanmar sesame germplasm. All genotypes were phenotyped for ten agronomic traits. All basic statistical parameters and phenotypic correlation were generated using STAR v2.0.1 and PBTools v1.4. Genotypic correlation and path analysis between yield and yield components were evaluated by SPAR 2.0 and R software package. Wide variations were observed for all traits studied in all germplasm. Primary branches, capsules and seed yield per plant showed high genotypic and phenotypic variances, PCV and GCV estimates that are enough scope for selection. Progeny selection will be effective to improve plant height and number of capsules per plant indicating high heritability with high genetic advance. In both genotypic and phenotypic correlation analysis, main seed yield contributing traits in sesame production were days to first and 50% flowering, plant height, primary branches, capsules per plant and capsule length. According to path analysis, positive direct effect on seed yield was contributed by days to first flowering followed by 1000 seed weight, capsules per plant, no. of primary branches per plant and capsule length. Therefore, days to first flowering, 1000 seed weight, capsules per plant, primary branches and capsule length may be good selection criteria for further sesame breeding programs related to high yielding varieties.

scholarly journals Association of Agro-Morphological and Oil Traits in Groundnut (Arachis hypogaea L.) Cultivars

2018 ◽  
Vol 6 (2) ◽  
pp. 67-74
Author(s):  
Zekeria Yusuf ◽  
Habtamu Zeleke ◽  
Wassu Mohammed ◽  
Shimelis Hussein ◽  
Arno Hugo
Keyword(s):  
Path Analysis ◽  
Oil Content ◽  
Block Design ◽  
Oil Quality ◽  
Genetic Correlations ◽  
Quality Parameters ◽  
Path Coefficient ◽  
Wet Season ◽  
Environmental Correlations ◽  
Selection For

The associations between the traits of interest in plant breeding are commonly evaluated by means of phenotypic, genotypic and environmental correlations, and through path coefficient analysis that shows direct and indirect cause and effect relationship. Sixteen groundnut genotypes (including local check) were evaluated for quantitative parameters. The crop was sown during 2015 wet season across four locations in Ethiopia. The experiment was laid out in Randomized Complete Block Design (RCBD) with two replications. The results indicated that genotypic correlations were higher than the phenotypic and environmental ones. The grain yield (kg/ha) has presented positive and significant genetic correlation with PWP, SWP and 100SW. Genetic correlations of oil content with agro-morphological traits and oil quality parameters were shown that oil content was significant and positively correlated with pod weight per plant (PWP) and seed weight per plant (SWP) showing that possibility of indirect selection for oil content through these traits. The path analysis based on genotypic correlation in the present study was shown that selection for oil content trait is effective through OY, GY, NMP and NSPOD; breeding for TPUS/TS trait is effective through selection for high oil content, NMP, PWP, AGBP, O/L ratio, and NSP traits. Furthermore, the path analysis has shown that breeding for high O/L ratio can be conducted through selection for AGBP, NSPOD, NSP, oil content, TPUS/TS or oleic acid traits; likewise breeding for oil yield (OY) can be conducted via selection for oil content, NSP, AGBP, NBP or TPUS/TS.

The effects of date pollinizer variety and pollination time on fruit set and yield of Medjhol date palm

2014 ◽  
Vol 2 (2) ◽  
pp. 67-71 ◽  
Author(s):  
Abdoul Amir Rahnama ◽  
Esmaeil Rahkhodaei
Keyword(s):  
Date Palm ◽  
Fruit Set ◽  
Block Design ◽  
Male Flower ◽  
Fruit Weight ◽  
Palm Fruit ◽  
Tropical Fruit ◽  
Male And Female ◽  
Time Interaction ◽  
Female Flowers

Date palm is unisexual, being either male or female. Male and female flowers grow on buds called Spathe, which opens naturally when fully mature. It is easy to identify the male and female flowers. Under the method of manual pollination, pollen from a male flower is smeared over female flowers. The pollen variety and pollination time have important effects on date palm fruit set, yield and quality. This experiment was carried out to study the effect of date pollinizer variety and pollination time on fruit set, growth and development of Medjhol date palm variety, in date palm garden of date palm and tropical fruit research institute of Iran during three years from 2009 to 2011. The trail was randomized complete block design in factorial manner with three pollen variety as Ghaname, Vardy, and Samesmave, two pollination time as 1-3 days before or after spathe opening and four replication. The results showed that the Vardy pollen had significant effects and increased the fertility percent and fruit yield, rather than two other pollen varieties. The pollen variety had no significant effects on fruit quality as total sugar, acidity, and bricx. The pollination time before spathe opening significantly increased fertility percent, decreased fruit weight and date palm yield. Finally the pollen variety and pollination time interaction effects showed that, application of Vardy pollen from 1-3 days after spathe opening with the most production date palm yield, equal 19.9 kilogram per any date palm trees, so this treatment is the best and are recommended.

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