Journal of Applied Botany and Food Quality 90, 147 - 153 (2017), DOI:10.5073/JABFQ.2017.090.018
1Ardahan University, Faculty of Engineering, Food Engineering Department, Ardahan, Turkey
2 Çukurova University, Faculty of Agriculture, Department of Horticulture, Adana, Turkey
3 İnönü University, Faculty of Agriculture, Department of Horticulture, Malatya, Turkey
Determination of S alleles in Paviot × Levent apricot progenies by PCR and controlled pollination
Zehra Tugba Murathan1*, Salih Kafkas2, Bayram Murat Asma3
(Received July 31, 2015)
* Corresponding author
Summary
In this study, the sexual incompatibility of Paviot and Levent apricot
parents and 89 F1 (Paviot × Levent) progenies was determined by
self-pollination experiments and S-allele-specific polymerase chain
reaction (PCR) technique. According to the self-pollination and
isolation analyses under field conditions, it was found that the Paviot
genotype is self-compatible (SC), whereas the Levent genotype is
self-incompatible (SI). It was determined that, of all the progenies,
55 had a fruit set below 5% and were self-incompatible, whereas
34 had a fruit set over 5% and were self-compatible. The PCR-based
techniques showed that, in parallel to the data obtained from the field
studies, 55 F1 progenies did not have Sc allele, whereas 34 progenies
involved Sc allele. There were ScS2 alleles in the Paviot genotype and
S20S52 alleles in the Levent genotype. It was determined that there
were S2S20, S2S52, ScS20, and ScS52 alleles in 89 F1 progenies and the
distribution of the four alleles in the progenies was found to be as
follows: 35.9% S2S20, 25.8% S2S52, 23.6% ScS20, and 14.6% ScS52.
F1 progenies nos. 41, 46, 86, and 89 should be used as pollinators in
further breeding studies.
Keywords: Apricot, Paviot, Levent, Self-incompatibility, PCR
Introduction
Apricot is one of the most important fruit types grown under mild
temperature conditions in the world. It is a delicious fruit owing to
its strong flavor and sugar-organic acid balance (GURRIERI et al.,
2001). Some European and Mediterranean countries such as Turkey,
Spain, Italy, France, and Greece have many local types of apricots,
and these countries contribute to more than 75% of the total apricot
production in the world (LECCESE et al., 2010).
Apricot belongs to Prunus species of the Rosaceae family (OZBEK,
1978). It was reported that there are two genes that control the
gametophytic self-incompatibility in Prunus species. One of these
genes is S-ribonuclease (S-RNase) related to the stylus and the other
one is the S-haplotype-specific F-box protein gene (SFB) related to
pollen (KAO and TSUKAMOTO, 2004; QIAO et al., 2004; MCCLURE,
2006).
Similar to the incompatibility, the functional capability of pollen is
ascribed by a series of genes (S1, S2, S3, S4, … ,Sn [multiple allele
series]). The diploid stylus typically involves two different S genes,
and each pollen grain carries one of the two genes. These gene
regions code S-RNase protein, which makes the incompatible
species to reject their own pollen (EBERT et al., 1986; MCCLURE
et al., 1989). The glycoproteins that have this ribonuclease activity
define S specificity in the pistil. If the pistil has the same gene as that
of the pollen, S-RNase shows a cytotoxic effect on the pollen tubes
and prevents the growth of the tubes, which leads to incompatibility
(ROALSON and MCCUBIN, 2003; GOLDRAIJ et al., 2006). In this case,
either the tip of the pollen tube that progresses through the stylus
swells or the tube end explodes (HESLOP-HARRISON, 1975). Some
physiological studies indicated that RNA degrades within 12-45 h
followed by an incompatible pollination (MCCLURE et al., 1990).
The breeding experiments are divided into the following two main
groups: conventional and biotechnological. The biotechnological
breeding includes molecular marker-assisted selection and genetic
transformation methods. This breeding yields the results more ra-
pidly than the conventional one (BASSI, 2006). In the apricot species
obtained from North America and Spain, initially, seven S alleles
(S1-7) were defined by using molecular techniques (ALBURQUERQUE
et al., 2002). Later, nine more alleles (S8-16) were defined through
NEpHGE and polymerase chain reaction (PCR) methods (HALASZ
et al., 2005). The existing S alleles were then detected in the apricot
species obtained from China, North America, Europe, Turkey, and
Tunisia (EGEA and BURGOS, 1996; HALASZ et al., 2005; ZHANG
et al., 2008; MILATOVIC et al., 2010; HALASZ et al., 2010; LACHKAR
et al., 2013).
The main objective of all breeding experiments is to improve pro-
ductivity. The productivity depends on the factors such as environ-
mental adaptability and self-incompatibility. Most of the self-
incompatible apricot varieties cannot be used in breeding programs
as they result in irregular fruit set and require a pollinator
(ZHEBENTYAYEVA et al., 2012). Therefore, it is very important to
know the incompatibility among the species that are used as parents
in breeding experiments. Sexual incompatibility can be found in
many commercially cultivated fruit species. In order to ensure the
fruit set in these species, there is a necessity for cross-pollination by
the wind or insects and pollinator species (BADANES et al., 2000).
The present study aimed to determine the sexual incompatibility and
to reveal the heredity of sexual incompatibility in 89 F1 (Paviot ×
Levent) progenies by the field and laboratory experiments.
Materials and methods
Plant Material
The research materials were obtained from the Apricot Collection
Orchard affiliated to İnönü University. This area has a continental
climate with latitude: altitude 977 m, 38˚20’20.23 N and longitude
38˚26’26.56 E. In this study, 89 F1 progenies (Paviot × Levent) were
used. F1 progenies were obtained through the artificial pollination
performed under the scope of the TUBITAK-TOGTAG Project in
2003. The hybridization was carried out to obtain the progenies
having the desired characteristics such as Paviot’s big fruits, orange
color of fruit peel, and resistance against Plum Pox: Levent’s late
blooming features. The leaf samples of each plant were stored at
4 °C after lyophilization. Fruit yield was determined as the mean fruit
quantity of per apricot tree (kg/tree). For each genotype, weighting
was done for every 10 fruits using a 0.05-g digital balance. The Brix°
degree of the fruit juice from 10 fruits was determined by digital
refractometry (ASMA and OZTURK, 2005).
Pollination tests
In the pollination tests, conducted during 2009-2011, from each
progeny, three different branches, each of which having approxi-
148 Z.T. Murathan, S. Kafkas, B.M. Asma
mately 300 flowers, were selected. The first branch was labeled
and left to open pollination. The second branch was bagged using
double-layered cheese cloth to prevent cross-pollination and to
ensure self-pollination a week before the anthesis. The third branch
was emasculated and left open, after that, they were artificially
pollinated for two or three times with their own pollen, which had
been collected and dried a day before. Approximately after 70-80
days, the fruit set rates were determined. At the end of the isolation
and artificial pollination, the progenies having the fruit set less than
5% were evaluated to be self-incompatible, and the others having
more than 5% were considered self-compatible (FAUST, 1998).
DNA extraction, S allele PCR analysis, and DNA sequencing
For DNA isolation from the leaf samples, the CTAB (Cetyl Trimethyl
Ammonium Bromide) protocol developed by DOYLE and DOYLE
(1987) was used with minor modifications (KAFKAS and PERL-
TREVES, 2001). The concentration of DNA in the samples was
determined by comparing with λ-DNA that was quantified by the gel
electrophoresis.
To determine S alleles, PCR was conducted using the primer
combinations designed for the first and second introns of S-RNase
genes and developed by TAO et al. (1999), ROMERO et al. (2004) and
VILANOVA et al. (2005) as listed in Tab. 1.
Each PCR reaction in 25 μL contained 75 mM Tris-HCl (pH 8.8),
20 mM (NH4)2SO4, 2 mM MgCl2, 0.1% Tween 20, 100 μM dATP,
100 μM dTTP, 100 μM dGTP, 100 μM dCTP, 0.2 μM of each primer,
1.0 unit of Taq DNA polymerase, and 50 ng of DNA. For PCR
amplification, the samples were pre-denatured at 94 °C for 3 min,
followed by 35 cycles with denaturation for 45 s at 94 °C, annealing
for 45 s at 54 °C or 58 °C, and extension for 60 s at 72 °C. For the final
extension step, the samples were kept at 72 °C for 10 min. The PCR
products were separated by electrophoresis on a 2% or 3% agarose
gel with 0.5× TBE (Tris-Borate-EDTA) depending on the band size
and were visualized under UV light by staining after with ethidium
bromide. At the same time, the amplification products were analyzed
by capillary electrophoresis using an ABI prism 3130xl automatic
DNA sequencer (Applied Biosystems).
The DNA sequencing of the PCR products was commercially per-
formed following Sanger’s method at Medsantek, Istanbul, Turkey.
The S alleles of the parents were determined by comparing the
sequences using BLAST with those available at the National Center
for Biotechnology Information (NCBI) database.
DUNCAN’s test (1955) was used for the significance control (p <
0.05) following variance analysis (ANOVA).
Results and discussion
Pollination Tests
The fruit set was 70% for the Paviot genotype and 45% for the
Levent genotype left open to the pollination. The fruit set of 51% was
observed in the Paviot genotype, and no fruit set was found for the
Levent genotype left to closed pollination during the harvest period
in 2009. Similarly, in the self-pollination branches, the fruit set rate
was detected to be 52% in the Paviot genotype and 1.5% in the
Levent genotype. In the isolation and self-pollination experiments,
the fruit set rate in the 56 F1 genotypes was below 5% (Tab. 2). FAUST
(1998) suggested that the verities having a fruit set rate less than 5%,
where self-pollination has been conducted, can be defined as self-
incompatible, whereas those having a fruit set more than 5% can
be defined as self-compatible. ASMA (2008) conducted the isolation
and self-pollination experiments and reported that the fruit set rate
of the Levent apricot genotype was below 5% and this genotype was
self-incompatible. Thus considering the results of our study, it can
be affirmed that Paviot genotype is self-compatible and the Levent
genotype is self-incompatible; 55 F1 progenies are self-incompatible
while 34 are self-compatible (Tab. 2). Similar results were obtained
from the field studies of different cultivars in recent years. ASKIN
(1989) reported that fruit set in Tokaloglu and Sam apricot cultivars
that do not yield fruit regularly in the Aegean Region was 0.46%
and 0.65%, respectively, and these species were self-incompatible.
BOLAT and GULERYUZ (1994) reported that the fruit set rate was
higher in the case of cross-pollination than self-pollination in
Hasanbey cultivars. PAYDAS et al. (2001) determined that 25 of the
62 apricot cultivars cultivated in the Malatya province were self-
compatible, while GULCAN et al. (2006) determined that 32 of the
70 apricot genotypes cultivated in Adana and Malatya provinces
were self-compatible. According to self-pollination studies conduc-
ted on Katy, Harcot, and Jiguang hybrids by WU et al. (2011), fruit
set rates were determined to be as follows: 19.68% for Katy ×
Harcot, 15.45% for Harcot × Katy, 7.78% for Katy × Jiguang, and
16.75% for Jiguang × Katy. In self-pollination studies of Harcot and
Chuanzhihong cultivars, fruit set rates were 0.57% and 0%; these
rates were 11.29% and 22.87% in cross-pollination experiments
(Harcot × Chuanzhihong and Chuanzhihong × Harcot), and both
cultivars were reported to be self-incompatible (GU et al., 2013).
S allele PCR analyses and DNA sequencing
At the end of PCR studies conducted with the PruT2, Src-F, and
Src-R primer combinations for the amplification of the first intron
region of the apricot S-RNase, a band of 353-bp was found in the
Paviot genotype (Fig. 1). In previous studies, the cultivars that showed
the 353-bp band were reported to be self-compatible when this
primer combination was used (VILANOVA et al., 2005). In addition,
a band of 328-bp in the Paviot genotype and 420-bp in the Levent
genotype were found.
In the PCR experiment, conducted with PruC2F and PruC4R primer
combination for the amplification of the second intron region of
S-RNase, no band was amplified for the Paviot genotype, and two
bands of approximately 1400 and 2100 bp were detected for the
Levent genotype. The analysis of the alleles included in F1 genotypes
showed that the 420-bp band in the gel obtained through PruT2-
SrcF-SrcR combination in the Levent genotype was the same to the
1400-bp band found in PruC2F-C4R combination.
The comparison of the nucleotide sequence obtained from the SrcF-
SrcR primer combination in parents and the current apricot S allele
sequences in the NCBI database indicated that S allele sequences of
Tab. 1: Primers used to determine S-alleles of genotypes
Primers Primer Design Base Reference
number
SRc-R GGC CAT TGT TGC ACA AAT TG 20 Vilanova et al.,
2005
SRc-F CTC GCT TTC CTT GTT CTT GC 20 Romero et al.,
2004
PruT2F GTT CTT GCT TTT GCT TTC TTC 21 Tao et al.,
1999
PruC4R GGA TGT GGT ACG ATT GAA 21 Tao et al.,
GCG 1999
PruC2F CTT TGG CCA AGT AAT TAT TCA 24 Tao et al.,
AAC 1999
Statistical analysis
The data are presented as means (n = 3) ±standard deviations (s.d.).
All statistical analyses were performed using SPSS 15.0 software.
Self-incompatibility of apricot 149
Tab. 2: Mean comparison of fruit set percentage after open, isolated and self-pollination in F1 progenies
Progenies Open Isolated Self Progenies Open Isolated Self
Pollination Pollination Pollination Pollination Pollination Pollination
(%) (%) (%) (%) (%) (%)
Paviot 70a 51a 52a P×L 45 16.9d 0.9d 2.5cd
Levent 45bc 0 0 P×L 46 24.2cd 40.5ab 34.6b
P×L 01 30cd 0 0 P×L 47 47.5b 10.4c 10.9c
P×L 02 25cd 12.2c 25.3b P×L 48 28.5cd 20bc 40.2ab
P×L 03 52.7b 1.2d 0 P×L 49 15.5d 0 3.2cd
P×L 04 50b 1.1d 0 P×L 50 17.4d 0 1.2d
P×L 05 27.1cd 0 0 P×L 51 38.5bc 6.3cd 14.6bc
P×L 06 30.7cd 23bc 17bc P×L 52 26.5cd 16bc 16.1bc
P×L 07 20cd 0 0 P×L 53 32.1c 6cd 1d
P×L 08 38c 3cd 2d P×L 54 52.2b 0 4.1cd
P×L 09 45bc 0 2d P×L 55 25cd 12.3c 10.8cv
P×L 10 13.9d 20bc 30b P×L 56 15.9d 0 0
P×L 11 25cd 25.9b 19.1bc P×L 57 39.6bc 12c 19.7bc
P×L 12 36.9c 0 1.5d P×L 58 15.4d 14.2bc 40.6ab
P×L 13 46.7bc 45ab 29.1b P×L 59 15d 1d 0
P×L 14 41.6bc 15.2bc 35ab P×L 60 21cd 0 0
P×L 15 34.5c 2.3cd 0 P×L 61 20.1cd 0 0
P×L 16 59.5ab 16.7bc 46.5ab P×L 62 14.5d 6.7cd 4.9cd
P×L 17 30.4cd 2.7cd 1.6d P×L 63 11d 5.8cd 5cd
P×L 18 7.4de 1.9d 0 P×L 64 11.8d 0 0
P×L 19 13.3d 17.5bc 24.4b P×L 65 14.1d 15.2bc 14.3bc
P×L 20 37.1c 1.3d 0 P×L 66 28.9cd 0 0
P×L 21 31.4cd 0 0 P×L 67 21.6cd 0 0
P×L 22 26.7cd 1.5d 1.4d P×L 68 11d 0 0
P×L 23 30cd 1.5d 0 P×L 69 17.6d 0 0
P×L 24 42.6bc 6.9cd 17.5bc P×L 70 13.4d 5cd 6.7cd
P×L 25 21.3cd 16.7bc 10c P×L 71 17.1d 6.2cd 6.4cd
P×L 26 10.7d 16bc 14.7bc P×L 72 13.2d 0 0
P×L 27 20.8cd 13.8c 20.5bc P×L 73 9.9de 0 2.2cd
P×L 28 50.6b 12.9c 16.5bc P×L 74 11.3d 1d 0
P×L 29 11.3d 0 1.1d P×L 75 10.9d 0 0
P×L 30 11.9d 3.2cd 1.7d P×L 76 7de 0 0
P×L 31 25cd 0 0 P×L 77 8.9de 0 0
P×L 32 22cd 0 1d P×L 78 12.1d 7.6c 6.5cd
P×L 33 29.1cd 0 1.7d P×L 79 9.1de 0 3cd
P×L 34 16.4d 5.8cd 6.7cd P×L 80 11.4d 1d 1d
P×L 35 50b 0 0 P×L 81 15d 0 1d
P×L 36 15.5d 0 0 P×L 82 9.9de 7.2c 6.6cd
P×L 37 15.6d 9.4c 20.9bc P×L 83 10.1d 0 0
P×L 38 34.7c 0 0 P×L 84 12.5d 0 0
P×L 39 10.9d 4.7cd 4.4cd P×L 85 15.9d 0 0
P×L 40 36.2bc 20.5bc 19.9bc P×L 86 19.8cd 4.5cd 5.7cd
P×L 41 54.3b 46.3ab 34.2b P×L 87 5.7e 0 0
P×L 42 41.7bc 0 0 P×L 88 12.3d 0 0
P×L 43 17.8d 1.1d 0 P×L 89 9.1de 7.2c 6.9cd
P×L 44 34c 12.9c 11.8c
Data followed by different letters are significantly different from each other (P < 0.05) according to Duncan’s test.
150 Z.T. Murathan, S. Kafkas, B.M. Asma
Paviot and Levent genotypes show homology with the Sc (353 bp), S2
(328 bp), S52 (1400 bp), and S20 (2100 bp) allele sequences of Prunus
armeniaca available at GenBank (ROMERO et al., 2004; VILANOVA
et al., 2006; ZHANG et al., 2008; JIANG et al., 2010). HALASZ et al.
(2010) reported that there are S6S19 alleles in the Levent genotype
so this apricot genotype is self-incompatible. In the present study,
the PCR bands obtained for the Levent genotype were sequenced
bidirectionally using the primers designed with the first and second
intron regions and the obtained DNA sequences were compared
with the allele sequences available in GenBank. At the end of this
study, the presence of S20S52 allele was found in the Levent geno-
type. Similarly, YILMAZ et al. (2013) reported that there was no Sc
allele in the Levent genotype and this genotype was self-incompati-
ble. In a study conducted with 63 wild apricot genotypes in Erzin-
can, it was reported that the local apricot cultivars cultivated in the
eastern region of Turkey mostly do not carry Sc allele (HALASZ et al.,
2013).
In parallel with the results obtained under field conditions, it was
found that 55 of the 89 F1 progenies did not carry the Sc allele, and
these progenies were self-incompatible (Tab. 3). It was found that
55 F1 progenies carried S2S52 and S2S20 allele pairs, and these plants
were self-incompatible. The distribution in F1 progenies of the alleles
detected in Paviot (ScS2) and Levent (S20S52) parents was as follows:
35.9% for S2S20, 25.8% for S2S52, 23.6% for ScS20, and 14.6% for
ScS52. BURGOS et al. (1997) reported that self-compatibility alleles
are dominant over incompatible alleles. In the present study, one
Fig. 1: S alleles determined through the use of Pru T2, SrcF and SrcR primer combination in parents and F1 progenies
Tab. 3: S genotypes of Paviot × Levent F1 progenies
Progenies Alleles Progenies Alleles Progenies Alleles Progenies Alleles
Paviot ScS2 P×L 22 S2S20 P×L 45 S2S52 P×L 68 S2S20
Levent S20S52 P×L 23 S2S52 P×L 46 ScS20 P×L 69 S2S20
P×L 01 S2S52 P×L 24 ScS20 P×L 47 ScS52 P×L 70 ScS20
P×L 02 ScS20 P×L 25 ScS52 P×L 48 ScS20 P×L 71 ScS20
P×L 03 S2S20 P×L 26 ScS52 P×L 49 S2S52 P×L 72 S2S20
P×L 04 S2S20 P×L 27 ScS52 P×L 50 S2S52 P×L 73 S2S20
P×L 05 S2S52 P×L 28 ScS20 P×L 51 ScS52 P×L 74 S2S20
P×L 06 ScS52 P×L 29 S2S20 P×L 52 ScS20 P×L 75 S2S52
P×L 07 S2S52 P×L 30 S2S20 P×L 53 S2S52 P×L 76 S2S20
P×L 08 S2S20 P×L 31 S2S20 P×L 54 S2S52 P×L 77 S2S20
P×L 09 S2S52 P×L 32 S2S20 P×L 55 ScS20 P×L 78 ScS20
P×L 10 ScS52 P×L 33 S2S52 P×L 56 S2S20 P×L 79 S2S20
P×L 11 ScS20 P×L 34 ScS20 P×L 57 ScS52 P×L 80 S2S20
P×L 12 S2S52 P×L 35 S2S52 P×L 58 ScS20 P×L 81 S2S20
P×L 13 ScS20 P×L 36 S2S20 P×L 59 S2S20 P×L 82 ScS52
P×L 14 ScS20 P×L 37 ScS20 P×L 60 S2S20 P×L 83 S2S52
P×L 15 S2S20 P×L 38 S2S20 P×L 61 S2S52 P×L 84 S2S52
P×L 16 ScS52 P×L 39 S2S52 P×L 62 S2S52 P×L 85 S2S20
P×L 17 S2S20 P×L 40 ScS20 P×L 63 ScS20 P×L 86 ScS52
P×L 18 S2S20 P×L 41 ScS20 P×L 64 S2S52 P×L 87 S2S20
P×L 19 ScS52 P×L 42 S2S20 P×L 65 ScS52 P×L 88 S2S52
P×L 20 S2S20 P×L 43 S2S52 P×L 66 S2S52 P×L 89 ScS20
P×L 21 S2S20 P×L 44 ScS20 P×L 67 S2S20
Self-incompatibility of apricot 151
incompatible allele and one Sc allele were found in 34 F1 progenies,
but they were self-compatible; in other words, Sc allele was found
dominant over the incompatible allele.
Tab. 4 shows the pomological features of F1 progenies observed in
2011. F1 progenies nos. 2, 3, 15, 17, 18, 20, 21, 22, 23, 34, 41, 46,
51, 52, 53, 54, 56, 62, 63, 68, 69, 72, 83, 86, and 89 had high fruit
yield. But the fruit weight and the total soluble solid content of
some of these progenies were low. The genotypes that can be used
in breeding experiments should be self-compatible and have good
pomological properties. F1 progenies nos. 41, 46, 86, and 89 had
both high fruit yield, fruit weight, and total soluble solid content and
they were also found to be self-compatible. The F1 progeny no. 84
was self-incompatible although the quality was high in pomological
characters.
Conclusion
The sexual incompatibility of Paviot and Levent apricot parents and
89 F1 (Paviot × Levent) progenies was determined by self-pollination
studies and S-allele-specific polymerase chain reaction (PCR).
The fruit set rate was high as cross-pollination was allowed in the
branches left open to pollination. No fruit set was found due to the
incompatible fertilization in the isolated and self-pollinated branches
in some progenies. Of the progenies, 55 were determined to be self-
incompatible. In conclusion, it is recommended that F1 progeny nos.
41, 46, 86, and 89 should be used as pollinators in further breeding
experiments, as these progenies have high quality in pomological
terms and they are self-compatible. The obtained results will be
useful in the selection of parents in apricot breeding studies and
these results will be useful for the selection of genotype in new
apricot orchards.
Tab. 4: Fruit characteristics of F1 genotypes
Pro- Fruit Kernel Brix° Pro- Fruit Kernel Brix° Pro- Fruit Kernel Brix°
genies Weight Weight (%) genies Weight Weight (%) genies Weight Weight (%)
(g) (g) (g) (g) (g) (g)
P×L 01 27.6± 2.5c 3.1± 0.2b 16.0± 1.1b P×L 31 31.6± 2.4bc 3.3± 0.2b 18.0± 1.0a P×L 61 24.9± 3.1c 3.3± 0.2b 18.5± 1.2ab
P×L 02* 23.1± 2.2c 2.6± 0.2b 16.0± 1.0b P×L 32 18.2± 1.9d 2.4± 0.2b 16.0± 1.4b P×L 62* 24.9± 3.1c 3.3± 0.2b 18.5± 1.2ab
P×L 03* 24.0± 2.8c 2.2± 0.2b 18.0± 0.9ab P×L 33 33.5± 2.4bc 3.5± 0.3b 17.0± 1.0b P×L 63* 29.9± 2.5bc 2.8± 0.2b 14.0± 0.5c
P×L 04 30.2± 2.3bc 4.3± 0.3a 18.0± 0.6ab P×L 34* 39.4± 2.7b 3.4± 0.2b 18.0± 1.2ab P×L 64 22.9± 2.0c 2.7± 0.2b 23.0± 1.2a
P×L 05 44.2± 4.5b 3.3± 0.3b 19.0± 1.2a P×L 35 31.5± 2.8bc 3.0± 0.3b 18.0± 1.4ab P×L 65 35.7± 2.9bc 4.1± 0.3a 20.0± 1.5a
P×L 06 20.0± 2.0c 2.7± 0.2b 18.0± 1.5ab P×L 36 28.3± 2.1c 3.0± 0.2b 18.0± 1.1ab P×L 66 26.9± 2.2c 2.9±0.3b 19.0± 1.3a
P×L 07 18.8± 1.6d 3.4± 0.3b 18.0± 1.2ab P×L 37 44.9± 2.8b 4.1± 0.3a 21.0± 0.8a P×L 67 34.5± 2.5bc 3.2± 0.3b 15.0± 1.1b
P×L 08 25.4± 2.3c 3.1± 0.2b 21.0± 1.1a P×L 38 35.8± 2.2bc 3.5± 0.2b 20.0± 0.6a P×L 68* 24.9± 2.6c 2.8±0.4b 16.0± 1.1b
P×L 09 24.8± 2.1c 2.5± 0.3b 19.0± 1.3a P×L 39 32.7± 2.1bc 3.7± 0.2ab 19.0± 0.9a P×L 69* 18.1± 1.8d 2.4±0.6b 12.0± 1.0d
P×L 10 20.2± 2.0c 2.4± 0.1b 18.0± 1.1ab P×L 40 18.4± 1.9d 2.6± 0.2b 14.0± 0.5c P×L 70 39.3± 3.9bc 3.8± 0.3ab 21.0± 1.1a
P×L 11 49.8± 3.7b 3.4± 0.1b 20.0± 1.4a P×L 41** 51.8± 2.2ab 4.3± 0.4a 20.0± 0.8a P×L 71 40.1± 3.0b 3.8± 0.3ab 18.0± 1.0ab
P×L 12 22.3± 2.5c 2.1± 0.1b 22.0± 1.2a P×L 42 40.6± 2.4b 2.5± 0.1b 19.0± 0.6a P×L 72* 20.6± 1.5c 2.3± 0.2b 16.0± 1.0b
P×L 13 21.5± 3.1c 2.6± 0.1b 14.0± 0.6c P×L 43 30.4± 2.1bc 3.1± 0.2b 13.0± 0.5c P×L 73 27.4± 2.6c 2.8± 0.2b 18.0± 1.1ab
P×L 14 23.5± 2.4c 2.1± 0.1b 16.0± 0.7b P×L 44 39.4± 3.9b 3.0± 0.2b 19.0± 0.9a P×L 74 47.3± 3.8b 4.3± 0.3a 19.0± 1.0a
P×L 15* 30.6± 2.8bc 3.9± 0.3ab 20.0± 1.3a P×L 45 36.9± 2.5bc 3.1± 0.1b 20.0± 0.6a P×L 75 23.6± 2.5c 2.7± 0.2b 17.0± 1.4b
P×L 16 18.1± 1.9d 3.0± 0.2b 21.0± 1.2a P×L 46* 59.3± 4.8ab 2.5± 0.2b 18.0± 0.8ab P×L 76 33.6± 3.7bc 3.4± 0.3b 17.0± 1.5b
P×L 17** 33.5± 2.5bc 3.8± 0.3ab 22.0± 1.4a P×L 47 27.8± 2.9c 3.2± 0.2b 18.0± 0.5ab P×L 77 25.7± 2.5c 2.1± 0.2b 15.0± 1.3b
P×L 18* 31.1± 2.3bc 3.2± 0.2b 17.0± 1.4b P×L 48 70.5± 4.7a 4.6± 0.3a 14.0± 0.6c P×L 78 21.2± 2.6c 2.6± 0.2b 16.0± 0.8b
P×L 19 42.6± 3.6b 3.7± 0.2ab 22.0± 1.2a P×L 49 32.9± 2.5bc 3.7± 0.2ab 16.5± 0.8bc P×L 79 23.6± 2.2c 2.8± 0.2b 18.0± 0.6ab
P×L 20* 30.5± 2.9bc 3.5± 0.2b 19.0± 1.1a P×L 50 31.4± 2.2bc 3.2± 0.2b 19.0± 1.5a P×L 80 34.8± 2.1bc 3.0± 0.2b 17.5± 0.9ab
P×L 21* 34.8± 2.4bc 3.4± 0.2b 22.0± 1.0a P×L 51* 21.6± 2.1c 2.9± 0.2b 16.0± 0.6b P×L 81 45.6± 4.9b 4.3± 0.3a 18.0± 1.0ab
P×L 22* 22.2± 2.1c 2.5± 0.1b 19.0± 1.5a P×L 52* 23.5± 2.9c 3.4± 0.2b 17.0± 0.5b P×L 82 30.6± 2.8bc 2.5± 0.1b 16.0± 1.2b
P×L 23* 14.6± 1.9d 1.6± 0.1c 20.0± 1.5a P×L 53* 40.3± 2.1b 3.4± 0.3b 22.0± 0.9a P×L 83* 65.0± 5.5a 4.6± 0.3a 14.0± 1.2c
P×L 24 35.7± 2.5bc 3.9± 0.2ab 17.5± 1.1ab P×L 54* 19.0± 1.4d 2.1± 0.1b 19.0± 0.9a P×L 84 59.0± 4.9ab 4.4± 0.3a 19.0± 1.1a
P×L 25 29.4± 1.4bc 2.7± 0.2b 18.0± 1.4ab P×L 55 24.1± 1.6c 2.1± 0.1b 17.0± 0.5b P×L 85 37.0± 2.5bc 3.4± 0.2b 16.0± 1.0b
P×L 26 40.3± 3.8b 3.9± 0.2ab 17.0± 1.6b P×L 56* 48.2± 1.5b 3.0± 0.1b 20.0± 1.1a P×L 86* 62.0± 5.5a 4.5± 0.3a 20.0± 1.2a
P×L 27 32.9± 2.3bc 2.9± 0.2b 17.0± 1.2b P×L 57 46.3± 3.6b 3.9± 0.1ab 19.0± 1.0a P×L 87 43.0± 5.2b 3.8± 0.2ab 15.0± 0.8b
P×L 28 38.1± 3.6bc 3.9± 0.2ab 19.0± 1.5a P×L 58 34.0± 3.2bc 3.3± 0.3b 15.0± 1.4b P×L 88 33.3± 2.6bc 3.3± 0.2b 16.0± 0.7b
P×L 29 18.1± 1.8d 2.2± 0.2b 21.0± 1.5a P×L 59 31.6± 3.5bc 3.0± 0.3b 16.5± 1.2b P×L 89** 55.7± 4.5ab 4.2± 0.3a 19.0± 1.8a
P×L 30 39.1± 2.6b 4.1± 0.3a 23.0± 1.6a P×L 60 23.8± 3.2c 2.2± 0.1b 20.0± 1.5a
*: High yield; **: Very high yield
Values are means ± standard deviation (SD) of three replications. Data followed by different letters are significantly different from each other (P < 0.05)
according to Duncan’s test.
152 Z.T. Murathan, S. Kafkas, B.M. Asma
Acknowledgments
This research was supported by a grant (No. 2010/12) from İnönü
University Scientific Research Project Unit.
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© The Author(s) 2017.
This is an Open Access article distributed under the terms
of the Creative Commons Attribution Share-Alike License (http://creative-
commons.org/licenses/by-sa/4.0/).
Address of the authors:
Zehra Tugba Murathan, Ardahan University, Faculty of Engineering, Food
Engineering Department, Ardahan, Turkey
E-mail: ztugbaabaci@hotmail.com
Salih Kafkas, Çukurova University, Faculty of Agriculture, Department of
Horticulture, Adana, Turkey
Bayram Murat Asma, İnönü University, Faculty of Agriculture, Department
of Horticulture, Malatya, Turkey