Adaptivity of sweet pepper varieties cultivated in the Astrakhan region

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Abstract


In agricultural production, it is important not only to achieve a high productivity, but also to ensure its stability. To obtain high and stable yields, it is necessary to have information on the adaptability of crops varieties and hybrids to a specific cultivation zone. The article analyzes the results of the field experiment on the variety testing of sweet pepper. To assess the variety for adaptability to natural conditions and cultivation technology in the Astrakhan region, such parameters as plasticity and stability of the variety were used. To characterize the ecological plasticity, the regression coefficient bi was determined, which characterizes response of the cultivar to changes in cultivation conditions. To characterize the parameter of stability, the standard deviation from the regression line σ2d. was calculated. All calculations were carried out according to S.A. Eberhart, W.A. Russell as presented by V.Z. Pakudin.


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Table 1. ANOVA results

Source

SS

df

MS

F

P value

Fcritical

Between groups

673.09

9

74.79

4.56

0.002

2.39

Within groups

327.73

20

16.39

   

Total

1000.83

29

    

Table 2. Sweet pepper productivity in 2017—2019

Cultivar

Yield, t/ha

2017

2018

2019

Yi

Average Yi

Podarok Moldovy (control)

42.8

49.3

37.7

129.8

43.3

Belozerka

46

50.2

44.9

141.1

47.0

Bogatyr

52.9

50.5

54.3

157.7

52.6

Vityaz

42.5

39.9

46.4

128.8

42.9

Korenovsky

56.3

48.7

54.3

159.3

53.1

Lolita

54.1

47.4

53.6

155.1

51.7

Zorka

40.5

49.6

44.7

134.8

44.9

Galatea

38.1

36.8

45.2

120.1

40.0

Dar Kaspiya

52.3

50.4

57.7

160.4

53.5

Titan

49.3

40.3

42

131.6

43.9

Yj

474.8

463.1

480.8

 

Average Yj

47.48

46.31

48.08

Table 3. Coefficients of linear regression for sweet pepper productivity

Cultivar

bi

Podarok Moldovy (control)

–6.417

Belozerka

–3.076

Bogatyr

2.1338

Vityaz

3.4734

Korenovsky

3.6209

Lolita

3.8078

Zorka

–3.456

Galatea

4.2472

Dar Kaspiya

3.7813

Titanium

1.8839

Table 4. Theoretical yield of sweet pepper cultivars, t/ha

Cultivar

Average Yij

Podarok Moldovy (control)

43.27

Belozerka

47.03

Bogatyr

52.57

Vityaz

42.93

Korenovsky

53.10

Lolita

51.70

Zorka

44.93

Galatea

40.03

Dar Kaspiya

53.47

Titanium

43.87

 

Table 5. Deviations of actual yield from theoretical, t/ha, and stability of sweet pepper cultivars

Cultivar

2017

2018

2019

Stability

σij2σd2

Podarok Moldovy (control)

0.75

–0.26

–0.50

0.88

0.88

Belozerka

–0.45

0.15

0.30

0.31

0.31

Bogatyr

–0.07

0.02

0.05

0.01

0.01

Vityaz

–1.09

0.37

0.72

1.85

1.85

Korenovsky

2.51

–0.85

–1.66

9.79

9.79

Lolita

1.68

–0.57

–1.11

4.36

4.36

Zorka

–3.78

1.28

2.50

22.14

22.14

Galatea

–2.74

0.93

1.81

11.65

11.65

Dar Kaspiya

–1.89

0.64

1.25

5.51

5.51

Titanium

5.08

–1.72

–3.35

39.98

39.98

Table 6. Adaptability parameters of sweet pepper cultivars, 2017—2019

Cultivar

bi

σd2

Podarok Moldovy (control)

–6.417

0.88

Belozerka

–3.076

0.31

Bogatyr

2.1338

0.01

Vityaz

3.4734

1.85

Korenovsky

3.6209

9.79

Lolita

3.8078

4.36

Zorka

–3.456

22.14

Galatea

4.2472

11.65

Dar Kaspiya

3.7813

5.51

Titanium

1.8839

39.98

About the authors

Elena Georgievna Myagkova

Precaspian agrarian federal scientific center of the Russian academy of sciences

Author for correspondence.
Email: govsan29@mail.ru
8 Severny block, p. Solenoye Zaymishche, Chernoyarsk district, Astrakhan region, 416251, Russian Federation

Researcher, Department of Agriculture and Complex Land Reclamation

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