2002 Trials – List

53090Adv | WQSC0HC33 | WQSC0LH198 | WQSC1 Summary | WQSC1HC33WQSC1LH198 | GEM A | GEM B

53090Adv

Four experimental lines, (53090-1-1-6-1-2-B, 53090-1-1-6-1-6-B, 53090-1-1-6-1-7-B, and 71712-B-1-1-3-1-B) were crossed to five testers LH227, LH295, LH198, LH244, and HC33. These and 7 check hybrids were evaluated in EXPT 53090ADV (see 53090ADV – Forage yield and quality evaluation).  The experimental topcrosses involved S6+ lines derived from WQS C0.

Hybrids were planted at three locations in 2002, Madison, Arlington, and Fond du Lac. There were two replications at each location. Planting dates were May 7 (Madison), May 10 (Fond du Lac), and May 16 (Arlington). The average planting densities were 26,800 plants/acre (Madison),  33,400 (Fond du Lac, and 30,200 plants/acre (Arlington). Dry conditions prevailed until mid July, but the Madison trial was in good shape by harvest on September 18.  Fond du Lac was in good condition at harvest on September 23. Arlington was damaged slightly by drought and also experienced some root lodging, but the plots were in good enough condition to harvest on October 8. Harvest dates at Madison and Arlington were delayed beyond the optimum dry matter of 30-40% because of weather and equipment difficulties. Therefore, the average dry matter at harvest was high.

Yield and dry matter were recorded at all three locations. Forage quality was measured only at the Madison and Arlington locations.

Quality evaluation included assessment of neutral detergent fiber (NDF), in vitro true digestibility (IVD), in vitro NDF digestibility (IVNDFD), crude protein (CP), and starch concentration. Based on these values, milk/ton of forage and milk/acre were estimated based on the MILK2000 equations developed by the UW Agronomy and Dairy Science Departments. MILK2000 uses forage composition (NDF, IVD, IVNDFD, CP, and starch) to estimate potential milk production per ton of forage. Forage yield is then used to estimate potential milk per acre.

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WQSC0HC33

Forty-five experimental topcrosses to HC33 and 8 check hybrids were evaluated in EXPT WQSC0HC33. The experimental topcrosses involved S5 and S6 lines derived from WQS C0. Twelve lines in WQSC0HC33 also appeared in testcrosses to LH198 in experiment WQSC0LH198.

Hybrids were planted at three locations in 2002, Madison, Arlington, and Fond du Lac. There were two replications at each location. Planting dates were May 7 (Madison), May 10 (Fond du Lac), and May 16 (Arlington). The average planting densities were 27,200 plants/acre (Madison),  33,400 (Fond du Lac, and 31,300 plants/acre (Arlington). Dry conditions prevailed until mid July, but the Madison trial was in good shape by harvest on September 16.  Fond du Lac was in good condition at harvest on September 23. Arlington was damaged slightly by drought and also experienced some root lodging, but the plots were in good enough condition to harvest on October 1. Harvest dates at Madison and Arlington were delayed beyond the optimum dry matter of 30-40% because of weather and equipment difficulties. Therefore, the average dry matter at harvest was high.

Based on forage yield, 34 entries were chosen for nutritional quality analysis (see WQSC0HC33 – Forage quality evaluation).  The summary over both HC33 and LH198 testcrosses is presented in WQSC0SUMMARY – Forage quality evaluation.

HC33 and LH198 Testcrosses

Nineteen experimental lines  were testcrossed to both LH198 and HC33. The experimental topcrosses involved S5 and S6 lines derived from WQS C0. The performance of these entries when testcrossed to either LH198 or HC33 are presented in trials WQSC0LH198 or WQSC0HC33, respectively.

The average performance over both LH198 and HC33 testcrosses is presented in WQSC0 SUMMARY – Forage quality evaluation.
Quality evaluation included assessment of neutral detergent fiber (NDF), in vitro true digestibility (IVD), in vitro NDF digestibility (IVNDFD), crude protein (CP), and starch concentration. Based on these values, milk/ton of forage and milk/acre were estimated based on the MILK2000 equations developed by the UW Agronomy and Dairy Science Departments. MILK2000 uses forage composition (NDF, IVD, IVNDFD, CP, and starch) to estimate potential milk production per ton of forage. Forage yield is then used to estimate potential milk per acre.

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WQSC0LH198

Fifty experimental topcrosses to LH198 and 6 check hybrids were evaluated in EXPT WQSC0LH198. The experimental topcrosses involved S5 and S6 lines derived from WQS C0 (see WQSC0LH198 – Forage yield evaluation). Twelve lines in WQSC0LH198 also appeared in testcrosses to HC33  in experiment WQSC0HC33.

Hybrids were planted at three locations in 2002, Madison, Arlington, and Fond du Lac. There were two replications at each location. Planting dates were May 7 (Madison), May 10 (Fond du Lac), and May 16 (Arlington). The average planting densities were 28,100 plants/acre (Madison),  33,400 (fond du Lac, and 30,800 plants/acre (Arlington). Dry conditions prevailed until mid July, but the Madison trial was in good shape by harvest on September 18.  Fond du Lac was in good condition at harvest on September 23. Arlington was damaged slightly by drought and also experienced some root lodging, but the plots were in good enough condition to harvest on October 7. Harvest dates at Madison and Arlington were delayed beyond the optimum dry matter of 30-40% because of weather and equipment difficulties. Therefore, the average dry matter at harvest was high.

Based on forage yield evaluations, 37 entries were selected for nutritional quality analysis (see WQSC0LH198 – Forage quality evaluation). The summary over both LH198 and HC33 test crosses is presented in WQSC0SUMMARY – Forage quality evaluation.

LH198 and HC33 test crosses

Nineteen experimental lines  were testcrossed to both LH198 and HC33. The experimental topcrosses involved S5 and S6 lines derived from WQS C0. The performance of these entries when testcrossed to either LH198 or HC33 are presented in trials WQSC0LH198 or WQSC0HC33, respectively.

The average performance over both LH198 and HC33 testcrosses is presented in WQSC0 SUMMARY – Forage quality evaluation.

Quality evaluation included assessment of neutral detergent fiber (NDF), in vitro true digestibility (IVD), in vitro NDF digestibility (IVNDFD), crude protein (CP), and starch concentration. Based on these values, milk/ton of forage and milk/acre were estimated based on the MILK2000 equations developed by the UW Agronomy and Dairy Science Departments. MILK2000 uses forage composition (NDF, IVD, IVNDFD, CP, and starch) to estimate potential milk production per ton of forage. Forage yield is then used to estimate potential milk per acre.

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WQSC1 Summary

One-hundred and six experimental lines were testcrossed to both LH198 and HC33, and the mean yield performance is summarized in WQSC1SUMMARY – Forage yield evaluation. The experimental topcrosses involved S4 and S5 lines derived from WQS C1. The performance of these entries when testcrossed to either LH198 or HC33 are presented in trials WQSC1LH198 or WQSC1HC33, respectively.

Forty-six entries with forage yield > 80% of checks, based on the average over both   LH198 and HC33 testcrosses, were selected for nutritional quality analysis (see WQSC1SUMMARY – Forage quality evaluation).

Quality evaluation included assessment of neutral detergent fiber (NDF), in vitro true digestibility (IVD), in vitro NDF digestibility (IVNDFD), crude protein (CP), and starch concentration. Based on these values, milk/ton of forage and milk/acre were estimated based on the MILK2000 equations developed by the UW Agronomy and Dairy Science Departments. MILK2000 uses forage composition (NDF, IVD, IVNDFD, CP, and starch) to estimate potential milk production per ton of forage. Forage yield is then used to estimate potential milk per acre.

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WQSC1HC33

One-hundred and thirty-seven experimental topcrosses to HC33 and 6 check hybrids were evaluated in EXPT WQSC1HC33 (see WQSC1HC33 – Forage yield evaluation). The experimental topcrosses involved S4 and S5 lines derived from WQS C1. Over 100  lines in WQSC1HC33 also appeared in testcrosses to LH198 in experiment WQSC1LH198. The summary over both testers is presented in WQSC1SUMMARY – Forage yield evaluation.

Hybrids were planted at two locations in 2002, Madison and Arlington. There were two replications at each location. Planting dates were May 7 (Madison) and May 16 (Arlington). The average planting densities were 27,502 plants/acre (Madison) and 31,320 plants/acre (Arlington). Dry conditions prevailed until mid July, but the Madison trial was in good shape by harvest on September 16.  Arlington was damaged slightly by drought and also experienced some root lodging, but the plots were in good enough condition to harvest on October 1. Harvest dates at Madison and Arlington were delayed beyond the optimum dry matter of 30-40% because of weather and equipment difficulties. Therefore, the average dry matter at harvest was high (44.5%).

Based on forage yield, 60 entries were chosen for nutritional quality analysis (see WQSC1HC33 – Forage quality evaluation).  The summary over both HC33 and LH198 testcrosses is presented in WQSC1SUMMARY – Forage quality evaluation).

Quality evaluation included assessment of neutral detergent fiber (NDF), in vitro true digestibility (IVD), in vitro NDF digestibility (IVNDFD), crude protein (CP), and starch concentration. Based on these values, milk/ton of forage and milk/acre were estimated based on the MILK2000 equations developed by the UW Agronomy and Dairy Science Departments. MILK2000 uses forage composition (NDF, IVD, IVNDFD, CP, and starch) to estimate potential milk production per ton of forage. Forage yield is then used to estimate potential milk per acre.

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WQSC1LH198

One-hundred and thirty-two experimental topcrosses to LH198 and 6 check hybrids were evaluated in EXPT WQSC1LH198 (see WQSC1LH198 – Forage yield evaluation). The experimental topcrosses involved S4 and S5 lines derived from WQS C1. Over 100  lines in WQSC1LH198 also appeared in testcrosses to HC33  in experiment WQSC1HC33. The summary over both testers is presented in WQSC1SUMMARY – Forage yield evaluation.

Hybrids were planted at two locations in 2002, Madison and Arlington. There were two replications at each location. Planting dates were May 7 (Madison) and May 16 (Arlington). The average planting densities were 28,419 plants/acre (Madison) and 31,319 plants/acre (Arlington). Dry conditions prevailed until mid July, but the Madison trial was in good shape by harvest on September 18.  Arlington was damaged slightly by drought and also experienced some root lodging, but the plots were in good enough condition to harvest on October 7. Harvest dates at Madison and Arlington were delayed beyond the optimum dry matter of 30-40% because of weather and equipment difficulties. Therefore, the average dry matter at harvest  was high (47.3%).

Based on forage yield evaluations, 58 entries were selected for nutritional quality analysis (see WQSC1LH198 – Forage quality evaluation). The summary over both LH198 and HC33 test crosses is presented in WQSC1SUMMARY – Forage quality evaluation.

Quality evaluation included assessment of neutral detergent fiber (NDF), in vitro true digestibility (IVD), in vitro NDF digestibility (IVNDFD), crude protein (CP), and starch concentration. Based on these values, milk/ton of forage and milk/acre were estimated based on the MILK2000 equations developed by the UW Agronomy and Dairy Science Departments. MILK2000 uses forage composition (NDF, IVD, IVNDFD, CP, and starch) to estimate potential milk production per ton of forage. Forage yield is then used to estimate potential milk per acre.

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GEM A

The GEM A trial consisted of the ongoing silage evaluation of elite GEM topcrosses that were identified in the past year as having high grain yield and suitable maturity for Wisconsin. There were 26 entries in GEM A involving breeding populations or early-generation GEM inbreds topcrossed to LH185, LH198, and LH283.

GEM A was planted at two WI locations, Madison (May 7) and Arlington (May 16), with three replications at each location. The average planting densities were 29,359 plants/acre (GEM A) and 28, 227 plants/acre (GEM B). Dry conditions prevailed until mid July, but the Madison trial was in good shape by harvest on September 25. Arlington was damaged slightly by drought and the Arlington trial also experienced some root lodging, but the plots were in good enough condition to harvest on October 8. Harvest dates at Madison and Arlington were delayed beyond the optimum dry matter of 30-40% because of weather and equipment difficulties. Therefore, the average dry matter at harvest was high, 47.3%, for GEMA.

Quality evaluation included assessment of neutral detergent fiber (NDF), in vitro true digestibility (IVD), in vitro NDF digestibility (IVNDFD), crude protein (CP), and starch concentration. Based on these values, milk/ton of forage and milk/acre were estimated based on the MILK2000 equations developed by the UW Agronomy and Dairy Science Departments. MILK2000 uses forage composition (NDF, IVD, IVNDFD, CP, and starch) to estimate potential milk production per ton of forage. Forage yield is then used to estimate potential milk per acre.

GEM A highlights

Several  testcrosses showed potential based on the milk/acre evaluations. Most of this production was due to high forage yield. However, one testcross, BR52051:N04-75-1 X LH198, also had excellent quality (low NDF, high IVD, and high milk/ton).

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GEM B

The GEM B trial consisted of 61 GEM inbreds topcrossed to HC33, LH185, LH198, LH279, LH287, and LH295. The inbreds involved in the GEM B trial were developed by the UW silage breeding program and were chosen based on topcross silage evaluations in previous years.

GEM B was planted at two WI locations, Madison (May 7) and Arlington (May 16), with three replications at each location. The average planting densities were 29,359 plants/acre (GEM A) and 28, 227 plants/acre (GEM B). Dry conditions prevailed until mid July, but the Madison trial was in good shape by harvest on September 25. Arlington was damaged slightly by drought and the Arlington trial also experienced some root lodging, but the plots were in good enough condition to harvest on October 8. Harvest dates at Madison and Arlington were delayed beyond the optimum dry matter of 30-40% because of weather and equipment difficulties. Therefore, the average dry matter at harvest was high, 49.5%, for GEMB.

Quality evaluation included assessment of neutral detergent fiber (NDF), in vitro true digestibility (IVD), in vitro NDF digestibility (IVNDFD), crude protein (CP), and starch concentration. Based on these values, milk/ton of forage and milk/acre were estimated based on the MILK2000 equations developed by the UW Agronomy and Dairy Science Departments. MILK2000 uses forage composition (NDF, IVD, IVNDFD, CP, and starch) to estimate potential milk production per ton of forage. Forage yield is then used to estimate potential milk per acre.

GEM B highlights

Several testcrosses were notable in the GEM B trial. Most of these had high production potential based on milk/acre. Three had excellent quality as well based on their low NDF, high IVD, and high milk/ton (SCRO1:N1310-398-1-B-21 X HC33, ARZM 17026:N1019-65008-2-3-1 X HC33, and CUBA164:S1517-01113 X LH287).

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