Language:

country
Association
Breeder n°
Password

Backto selection form

Breed planning for mating stations 2026

Breeding values of the selected mother queen

code of queen 2aInbreeding
Queen
Inbreeding
Worker
Honey
yield
Defensive
behavior
Calmness
during
inspection
Swarming
drive
Varroa-
index
TBVPerformance
ndex
hygienic
behaviour
Varroa
growth
Colony
strength
spring
development
over-
wintering
Chalk-
brood
CBPNosemosisSMRRecappingRecapping
infested cells
DE-2-254-117-20241.0%2.9%102 0.4594 0.5196 0.51101 0.41(110) 0.4410498 0.45(112) 0.44(107) 0.40(99) 0.38(102) 0.40(117) 0.36100 0.2498 0.3096 0.11(104) 0.33(112) 0.32(111) 0.30

Breeding values and inbreeding coefficients of potential descendants

mating station codedetails of mating stationMate (4A)Breeding values
C ASSOC No. D Code Surname TM from to Breeding line C4A A4A B4A No4A Y4A Code Honey
yield
Defensive
behavior
Calmness
during
inspection
Swarming
drive
Varroa-
index
Total
breeding
value
Performance
ndex
hygienic
behaviour
Varroa
growth
Colony
strength
spring
development
over-
wintering
Chalk-
brood
CBP Nosemosis SMR Recapping Recapping
infested cells
INZW
Weighting in %
1515151540--
DE 1 1 Hornisgrinde 3 25.05. 20.07. AGT-Population DE 1 7 57 2023 103 99 99 106 108 105 102 110 105 90 100 107 97 99 98 98 105 106 1.6%
DE 1 2 AGT Toleranz Hoher Randen 3 16.05. 01.08. AGT Population DE 2 221 69 2023 102 104 102 106 111 109 104 111 111 103 104 106 99 98 96 103 101 98 2.7%
DE 1 3 Herrenwald 3 25.05. 20.07. AGT Population DE 2 221 70 2023 104 103 102 107 111 109 105 111 111 103 101 107 99 98 96 103 101 98 2.7%
DE 2 10 10 Oby. Unterwieser Wald 3 01.06. 15.08. AGT-Population; Z: Köpke DE 2 632 52 2024 107 108 109 107 116 114 109 117 114 106 109 123 102 98 95 103 104 104 5.2%
DE 2 11 11 Oby. Freisinger Moos 3 15.05. 31.07. AGT-Population; Z: Ott DE 2 227 167 2021 99 103 104 99 101 102 102 102 100 103 102 109 100 99 95 98 104 102 4.4%
DE 2 12 12 Oby. Pfaffenkopf 3 27.05. 01.08. AGT-Population, Z: Stoib DE 2 245 66 2023 104 95 97 104 110 105 100 111 109 103 99 110 100 101 99 101 104 106 1.3%
DE 2 13 13 Oby. An den 3 Wassern AGT-Toleranzbelegstelle 6 30.05. 01.08. AGT-Population; Z: FZ Mayen DE 11 1 1330 2022 107 93 97 110 112 107 102 115 108 99 96 116 100 103 98 109 109 111 2.4%
DE 2 15 15 Oby. Sonnwendjoch 3 01.06. 20.07. Z: Deller DE 2 254 117 2022 98 97 97 99 106 101 97 108 104 92 98 105 95 99 96 101 114 112 6.9%
DE 2 16 16 Oby. Raggert 3 01.06. 01.08. Z: Moser DE 2 363 207 2023 106 99 99 103 108 105 102 109 106 100 104 108 99 99 100 108 106 105 2.8%
DE 2 18 18 Oby. Sauschütt 3 16.05. 01.08. AGT-Population; Z: Schmidt DE 2 293 46 2022 100 99 102 103 108 105 101 110 106 98 99 106 98 104 98 101 106 106 2%
DE 2 19 19 Oby. Wendelstein 3 22.05. 31.07. AGT-Population; Z: Wintersperger DE 2 211 318 2023 109 106 107 108 111 111 109 112 110 108 108 115 100 100 98 97 102 103 3.1%
DE 2 21 21 Nby. Rachel- Diensthütte 3 13.05. 08.08. Z: Angela Tholen † DE 2 736 240 2022 105 99 102 105 107 106 104 108 106 98 98 109 100 103 95 99 105 105 3.8%
DE 2 22 22 Nby Bramandlberg 3 09.05. 25.07. AGT-Population; Z: Solleder DE 2 256 780 2023 101 102 103 106 106 105 104 108 103 95 98 108 98 100 98 99 105 107 3%
DE 2 23 23 Nby Königswald 3 29.04. 15.08. Ca.- Sklenar; Z: Andreas Levcenko DE 2 308 14 2022 104 100 98 103 101 101 101 100 102 102 101 109 99 99 100 107 103 100 1.9%
DE 2 24 24 Nby Schellenberg 3 09.05. 25.07. AGT-Population; Z: Ahrens DE 2 221 74 2023 102 103 101 104 110 107 103 109 110 103 102 106 99 98 96 103 101 98 2.7%
DE 2 33 33 Opf. Am Kühweiher 3 12.05. 10.07. AGT Population; Z: Thein DE 2 752 14 2023 104 104 104 106 107 107 106 108 106 106 104 109 100 99 97 97 101 103 2.4%
DE 2 41 41 Ofr. Michaelsgraben 3 16.05. 25.07. Z: Merz DE 2 737 11 2023 108 97 98 105 107 105 102 107 107 105 102 113 101 99 95 97 104 102 4.6%
DE 2 43 43 Ofr. Bodenwiese 3 12.05. 14.07. AGT-Population; Z: Schmidt DE 2 293 66 2023 108 108 109 112 111 113 111 113 110 108 106 108 99 100 98 96 108 107 2.8%
DE 2 44 44 Ofr. Hufeisen 3 22.05. 28.07. AGT-Population, Z: Kempter DE 2 298 45 2020 102 96 95 103 104 101 99 104 104 105 97 110 101 101 94 97 107 106 5.5%
DE 2 51 51 Mfr. Tiergarten 3 06.05. 31.07. AGT-Population, Z: LLA Triesdorf DE 2 128 69 2023 110 96 98 102 104 103 102 104 105 102 107 112 98 99 100 95 99 96 2.4%
C ASSOC No. D Code Surname TM from to Breeding line C4A A4A B4A No4A Y4A Code Honey
yield
Defensive
behavior
Calmness
during
inspection
Swarming
drive
Varroa-
index
Total
breeding
value
Performance
ndex
hygienic
behaviour
Varroa
growth
Colony
strength
spring
development
over-
wintering
Chalk-
brood
CBP Nosemosis SMR Recapping Recapping
infested cells
INZW
DE 2 61 61 Ufr. Spessart 3 19.05. 28.07. AGT-Population; Z: Ahrens DE 2 221 102 2022 106 108 107 106 116 113 108 116 115 107 100 107 100 99 98 105 97 96 2.7%
DE 2 62 62 Ufr. Gramschatzer Wald 3 20.05. 29.07. AGT-Population; Z: LLH Kirchhain DE 7 45 658 2023 105 105 104 104 111 109 106 111 110 103 101 109 97 97 96 106 107 103 5.2%
DE 2 63 63 Ufr. Haßberge AGT-Toleranzbelegstelle 6 12.05. 14.07. AGT-Population; Z: Bichlmeier DE 2 326 716 2023 106 104 107 110 115 112 108 117 112 103 105 112 100 99 96 108 106 105 4.5%
DE 2 71 71 Schw. Scheppacher Forst AGT-Toleranzbelegstelle 6 15.05. 24.07. AGT-Population, Z: Frey DE 2 294 100 2022 103 100 102 99 105 103 101 105 106 110 113 116 99 98 98 102 105 100 1.9%
DE 2 72 72 Schw. Gunzesried/Ostertal 3 30.05. 25.07. AGT-Population, Z: Fischer DE 2 703 77 2022 99 104 107 96 106 104 102 107 105 100 104 116 100 99 99 97 105 103 1%
DE 2 73 73 Schw. Giebelhaus 3 30.05. 25.07. Z: Witt DE 2 172 1 2022 104 103 104 104 105 105 104 105 104 101 108 110 101 103 96 99 100 103 2.6%
DE 2 74 74 Schw. Bleckenau 3 29.05. 17.07. Z: Moser DE 2 363 200 2023 106 98 98 104 106 104 102 108 104 102 102 108 99 99 100 108 106 105 2.8%
DE 2 75 75 Schw. Hochgrat AGT-Toleranzbelegstelle 6 23.05. 01.08. AGT-Population, Z: Wintersperger DE 2 211 318 2023 109 106 107 108 111 111 109 112 110 108 108 115 100 100 98 97 102 103 3.1%
DE 4 3 Waldhof 3 27.05. 01.08. C-4-3 Waldhof DE 4 279 1 2022 102 96 96 96 86 91 97 86 86 102 106 114 97 98 98 104 104 103 1.7%
DE 4 5 Hohenheide 3 20.05. 15.07. C-4-5 Hohenheide DE 4 311 707 2024 112 101 101 108 105 107 107 107 104 105 108 116 102 99 101 95 102 104 1.3%
DE 4 7 Lattbusch 3 22.05. 17.07. 4/7/Lattbusch DE 4 301 163 2023 111 113 115 114 114 117 116 116 111 116 112 109 98 99 101 109 102 102 0.4%
DE 4 8 Schorfheide-Wildfang 3 15.05. 15.08. 90/Varoatoleranz/LIB DE 4 306 51 2023 110 99 102 103 117 111 104 118 115 109 114 110 102 101 101 104 102 105 0.7%
DE 4 10 Rotkäppchen 3 01.06. 01.08. Varoatoleranz/Rotkäppchen/4-10 DE 4 307 124 2024 126 112 113 120 121 124 121 121 120 120 123 121 102 99 102 100 104 107 1.9%
DE 6 1 Spiekeroog 2 02.06. 02.08. Carnica Troiseck Hoffmann (21) DE 6 36 31 2023 107 102 103 111 108 109 107 109 107 98 103 108 100 99 94 105 104 104 4.4%
DE 6 2 Neuwerk 2 18.05. 11.08. Carnica DE 6 1 736 2023 104 92 94 98 105 100 96 103 105 101 104 110 102 99 98 100 105 105 1.4%
DE 6 12 Neuenhof 3 13.06. 16.08. C-T 1075 DE 6 198 42 2023 107 103 104 109 111 110 107 113 108 101 104 113 99 100 98 99 106 107 2.8%
DE 6 14 Gebirgsbelegstelle Torfhaus 3 25.05. 06.07. Carnica -Celle DE 6 1 2786 2022 104 89 91 96 99 96 94 99 100 97 105 105 99 100 98 99 107 106 2%
DE 8 1 2 Greifswalder Oie 6 02.06. 17.06. Carnica AGT DE 15 252 1 2023 106 97 98 104 108 105 102 110 106 97 102 112 101 94 99 102 103 102 1.6%
DE 8 3 Dornbusch 2 26.06. 23.07. Carnica DE 6 90 146 2023 104 98 97 108 110 106 102 111 107 103 106 107 101 98 97 105 105 106 3.1%
DE 11 3 Inselbelegstelle Borkum 2 09.05. 18.07. Carnica Sklenar 47/9/26 DE 11 3 60 2022 93 99 98 87 97 94 93 95 99 91 96 101 102 99 98 105 104 101 0%
C ASSOC No. D Code Surname TM from to Breeding line C4A A4A B4A No4A Y4A Code Honey
yield
Defensive
behavior
Calmness
during
inspection
Swarming
drive
Varroa-
index
Total
breeding
value
Performance
ndex
hygienic
behaviour
Varroa
growth
Colony
strength
spring
development
over-
wintering
Chalk-
brood
CBP Nosemosis SMR Recapping Recapping
infested cells
INZW
DE 11 11 Erbeskopf AGT-Toleranzbelegstelle 3 26.05. 21.07. AGT-Population DE 11 171 309 2023 111 97 99 107 110 108 104 112 109 96 98 109 100 101 97 101 101 99 2%
DE 13 9 Naturpark Erzgebirge-Vogtland 3 29.05. 10.07. Peschetz DE 2 227 355 2023 108 103 103 109 111 110 107 111 110 107 104 110 99 101 98 96 102 104 2.7%
DE 13 11 Blockstelle 3 09.06. 21.07. Peschetz DE 13 90 672 2022 107 101 106 108 106 107 107 106 106 106 106 114 101 93 100 102 103 99 2%
DE 14 1 Kaiserstein 3 30.05. 27.06. DE 6 36 31 2023 107 102 103 111 108 109 107 109 107 98 103 108 100 99 94 105 104 104 4.4%
DE 15 1 Amrum 2 09.06. 21.07. C-Kombi DE 15 69 8 2022 111 98 100 103 109 107 103 108 110 101 98 105 102 99 97 100 103 103 0.9%
DE 15 3 Hamburger Hallig 2 06.06. 11.07. Carnica Sklenar DE 16 337 232 2023 105 98 99 101 101 101 101 101 101 106 110 114 98 101 97 107 104 103 0.5%
DE 15 4 Helgoland 2 13.05. 31.07. C- Kombi BALKAN DE 15 233 12 2022 109 104 105 107 103 106 107 101 104 101 106 114 100 101 98 99 103 103 1.4%
DE 15 6 List auf Sylt 2 26.05. 20.07. C-Troiseck AT 99 193 62961 2023 106 100 99 103 113 108 102 114 110 99 101 111 99 97 97 104 98 100 3.5%
DE 15 9 Puan Klent / Sylt 2 26.05. 15.08. C- Varroatoleranz DE 6 90 167 2023 105 96 95 107 111 106 101 113 109 103 106 107 101 98 97 105 105 106 3.1%
DE 16 9 Oberhof 3 30.05. 01.08. DE 2 293 66 2023 108 108 109 112 111 113 111 113 110 108 106 108 99 100 98 96 108 107 2.8%
DE 16 11 Kieferle 3 06.06. 25.07. DE 16 310 147 2023 106 100 99 104 107 106 103 107 108 101 99 105 101 95 98 105 103 102 2.2%
DE 17 3 Wangerooge 2 24.05. 29.07. Carnica Selektionslinie LIB (90) DE 6 90 170 2023 105 97 96 108 111 107 102 113 109 103 106 107 101 98 97 105 105 106 3.1%
DE 17 4 Langeoog 2 31.05. 09.08. Carnica-03 (40) DE 17 208 49 2023 101 103 104 106 109 107 104 106 112 99 100 106 99 95 98 111 103 104 1.3%
DE 17 5 AGT Varroatoleranzbelegstelle Norderney (70) 2 24.05. 26.07. Carnica Varroatoleranz (SMR) DE 7 45 658 2023 105 105 104 104 111 109 106 111 110 103 101 109 97 97 96 106 107 103 5.2%
DE 17 6 Juist 2 25.05. 26.07. Carnica Sklenar 47/9/26 (13) DE 14 21 1317 2022 103 101 102 102 101 102 102 101 100 104 108 113 97 99 97 106 105 103 0.7%
DE 19 51 Eisbachtal 3 15.05. 21.07. Carnica AGT DE 19 346 803 2023 108 102 101 102 109 107 104 110 108 105 102 112 99 101 100 97 101 103 1.9%
DE 19 52 Hasental 3 15.05. 17.07. Carnica DE 2 266 231 2023 109 97 99 101 98 101 102 98 98 105 107 114 100 98 98 97 108 102 1.5%
DE 41 1 Sächsische Schweiz 6 31.05. 05.08. Carnica Kirchhain DE 7 45 662 2023 103 102 101 103 110 107 103 110 109 106 103 110 97 97 96 108 109 106 5.2%
AT 99 6 Löhnersbach 3 02.06. 30.07. IT 20 68 1013 2024 103 98 100 98 111 105 100 112 109 102 101 113 99 97 93 100 103 105 4.2%
AT 99 7 Blühnbachtal 3 31.05. 26.07. AT 99 400 745 2023 104 99 101 105 108 106 103 109 107 102 103 113 100 100 96 106 103 105 4.4%
C ASSOC No. D Code Surname TM from to Breeding line C4A A4A B4A No4A Y4A Code Honey
yield
Defensive
behavior
Calmness
during
inspection
Swarming
drive
Varroa-
index
Total
breeding
value
Performance
ndex
hygienic
behaviour
Varroa
growth
Colony
strength
spring
development
over-
wintering
Chalk-
brood
CBP Nosemosis SMR Recapping Recapping
infested cells
INZW
AT 99 8 Kristeinertal - Osttirol 3 02.06. 28.07. AT 99 662 21 2023 102 95 97 100 109 103 98 107 109 105 104 110 101 98 97 104 103 104 2.6%
AT 99 13 Pusterwald 3 29.05. 31.07. AT 99 120 87 2023 107 106 107 104 119 114 107 119 118 97 103 117 101 97 95 107 102 106 6.3%
AT 99 16 1 Dürradmer 3 15.05. 04.06. AT 99 364 106 2023 106 104 107 111 111 111 108 113 109 104 106 114 101 99 96 105 105 105 4.1%
AT 99 16 2 Dürradmer 3 09.06. 04.08. AT 99 364 908 2023 104 102 105 108 107 107 105 107 106 97 97 107 100 98 97 103 106 104 3.2%
AT 99 17 1 Gschöder 3 15.05. 04.06. AT 99 364 121 2022 105 102 104 111 109 109 107 110 107 99 98 106 98 98 96 104 110 108 4.5%
AT 99 17 2 Gschöder 3 09.06. 04.08. AT 99 364 705 2023 106 107 107 108 108 109 108 111 106 100 101 110 99 98 96 100 106 105 2.5%
AT 99 21 Abtenau Zinkenbach 3 29.05. 28.07. AT 99 99 1 2023 105 104 108 109 109 109 107 110 108 101 104 114 103 101 95 107 104 105 6.8%
AT 99 27 Geiselgrundalm 3 29.05. 28.07. AT 99 193 62459 2023 105 105 105 102 111 109 105 112 110 99 97 112 101 101 94 105 105 107 5.3%
AT 99 38 Johannsenruhe 3 14.06. 09.08. AT 99 377 92 2023 108 108 109 105 118 115 109 117 118 103 107 116 101 99 96 109 102 109 6.5%
AT 99 40 Kocnatal 3 30.05. 14.08. AT 99 193 63000 2023 108 99 98 101 106 104 102 108 103 100 96 104 100 101 96 106 107 109 3.3%
AT 99 41 Radlgraben 3 01.06. 31.07. AT 99 169 223 2023 102 99 101 100 106 104 101 107 104 102 104 113 103 100 96 101 102 105 5%
AT 99 44 Steinberg 3 28.05. 23.07. AT 99 888 331 2023 110 107 107 109 112 112 110 112 112 105 107 113 101 100 95 108 104 107 6.4%
AT 99 45 Gößgraben 3 15.05. 31.07. AT 99 377 501 2023 104 103 103 100 121 112 103 120 120 97 103 116 101 99 95 105 105 107 6.3%
AT 99 46 Mühldorfer Ochsenalm 3 31.05. 15.08. AT 99 117 4 2023 102 99 101 100 114 108 101 116 112 102 104 115 104 99 97 98 109 110 7.3%
AT 99 48 Pöllatal 3 28.05. 31.07. AT 99 663 132 2024 103 97 98 102 110 105 100 109 110 103 103 111 101 99 96 104 103 104 4.6%
AT 99 50 Valentinalm 3 31.05. 15.08. AT 99 120 84 2023 107 109 109 105 118 115 109 118 117 97 102 117 101 98 95 107 104 107 6.3%
AT 99 56 Tratten 3 14.05. 16.07. AT 99 117 38 2023 103 105 105 101 112 109 104 112 112 96 103 114 101 100 96 103 107 110 5.5%
AT 99 58 Mühlviertler Alm 3 21.05. 30.07. AT 99 377 23 2023 106 102 102 110 113 110 106 114 111 98 104 121 100 99 96 100 104 109 4.3%
AT 99 59 Scheiterboden 3 23.05. 15.08. AT 99 671 85 2023 114 108 109 110 116 116 112 116 115 108 110 115 101 100 96 104 105 108 6.8%
AT 99 98 Seetal 3 25.05. 27.07. AT 99 377 74 2023 108 106 106 105 116 113 107 116 115 103 107 120 102 99 96 104 103 108 6.6%
C ASSOC No. D Code Surname TM from to Breeding line C4A A4A B4A No4A Y4A Code Honey
yield
Defensive
behavior
Calmness
during
inspection
Swarming
drive
Varroa-
index
Total
breeding
value
Performance
ndex
hygienic
behaviour
Varroa
growth
Colony
strength
spring
development
over-
wintering
Chalk-
brood
CBP Nosemosis SMR Recapping Recapping
infested cells
INZW
CH 51 1 Bonatchiesse 3 13.06. 01.08. CRP/48 CH 52 707 40 2023 106 95 98 101 103 101 100 103 102 106 106 107 99 101 98 99 103 102 0.8%
CH 51 3 Petit-Mont 3 23.05. 26.07. B20F1/3 CH 51 45 1893 2023 95 89 88 97 99 94 91 101 98 96 97 101 100 99 98 101 104 103 0.4%
CH 51 5 Vermeilley 3 06.06. 01.08. KT02/23 CH 51 152 5652 2022 92 95 95 98 99 96 94 98 100 97 98 98 100 99 98 101 104 103 0.4%
CH 51 6 Moiry 3 13.06. 08.08. B20x30 / 11 CH 51 36 3427 2022 96 95 95 96 99 96 94 100 99 93 96 101 99 99 98 101 104 103 0.6%
CH 51 7 Toules 3 06.06. 01.08. CRP/48 CH 52 707 40 2023 106 95 98 101 103 101 100 103 102 106 106 107 99 101 98 99 103 102 0.8%
CH 51 8 Hongrin 3 30.05. 01.08. KL 14 / 50 CH 51 91 4677 2023 98 93 95 99 105 99 95 105 104 96 97 102 100 99 98 101 104 103 0.5%
CH 51 21 Mont-Dar 3 30.05. 25.07. S91 CH 51 78 9810 2023 97 89 89 98 100 95 92 100 100 98 101 107 100 99 98 101 104 103 0.4%
CH 51 22 SADE 3 16.05. 01.08. GB10 / 22 CH 51 206 903 2024 93 89 90 97 100 94 91 102 98 92 96 100 99 99 97 102 105 104 1.4%
CH 51 51 Grande-Enne 3 14.05. 06.06. 01P / 6 CH 51 10 4636 2023 100 90 90 96 100 96 93 100 100 95 104 107 99 99 98 100 104 103 0.6%
CH 52 5 Greina 3 13.06. 31.07. DE 19 186 21 2022 96 98 97 99 112 104 97 113 110 95 98 104 95 98 97 101 112 111 5%
CH 52 7 Justistal 3 26.05. 31.07. DE 1 45 172 2022 100 104 104 104 114 109 104 116 110 95 99 107 92 100 96 100 118 115 7.5%
CH 52 9 Hochgebirgsbelegstelle S-charl 3 13.06. 26.07. DE 16 337 224 2023 105 99 100 104 102 103 103 103 100 106 110 114 99 101 97 107 105 103 0.5%
CH 52 39 Nessleren 3 30.05. 29.07. CH 52 707 36 2022 103 97 99 104 100 101 101 101 99 106 104 105 101 101 97 99 103 103 1.3%
IT 4 1 Val Genova (TN) 3 06.06. 31.07. Kirchhain IT 20 106 84 2022 99 95 97 97 107 101 96 109 105 103 100 108 101 99 98 99 104 104 1.8%
IT 20 3 Pederü 3 27.05. 13.06. IT 20 108 9044 2023 112 102 102 108 115 112 107 114 114 104 108 121 102 101 98 99 105 105 3.5%
NL 55 2 Vlieland 2 06.06. 05.07. NL 55 55 41 2023 103 104 104 104 104 105 105 105 103 97 101 105 99 97 98 103 104 102 2.9%

Notice

The inbreeding coefficient refers to the workers of the planned colony. The inbreeding coefficient of the queen only depends on the mother colony and is 2.94 %.

Click on queen code shows pedigree, breeding values and inbreeding coefficients.

The total breeding values is calculated using the given weighting factors.

Only island and line mating stations with a registered 4a, subjected to breeding values estimation are displayed. For a full list of mating stations, see Allocation of mating stations.

The breeding record data is the responsibility of the state associations !

Use of genetic evaluation data for publications or commercial purposes is subject to permission by the Institute for Bee Research Hohen Neuendorf, Germany, Länderinstitut für Bienenkunde Hohen Neuendorf e.V.

The performance index is composed of the breeding value for honey yield, gentleness, calmness and swarming tendency in equal proportions.

For suggestions and comments use our contact form, please.

Legend

TM
Type of mating station
1 - Insemination station with fixed 4a
2 - Island mating station
3 - line mating station
4 - race mating station
6 - tolerance mating station
TBV
Total breeding value
INZW
Inbreeding coefficient of planned offspring