Answer :
Final answer:
The two-factor factorial experiment compares the litter sizes of Yorkshire and Landrace sows from unselected and selected lines. It aims to determine if there is a significant difference in litter size between the breeds and if selection for increased litter size has an impact.
Explanation:
In this two-factor factorial experiment, the researchers are comparing the litter sizes of Yorkshire and Landrace sows from two different lines: unselected and selected. The unselected line refers to sows that have not undergone any specific selection for increased litter size, while the selected line refers to sows that have been bred for increased litter size for 15 years.
Two sows of each breed are randomly selected from each line, and their litter sizes are recorded. For Yorkshire sows from the unselected line, the litter sizes were 8 and 9. On the other hand, Yorkshire sows from the selected line had litter sizes of 11 and 11.
For Landrace sows, the litter sizes from the unselected line were 9 and 10, while the litter sizes from the selected line were 10 and 9.
This experiment allows researchers to compare the effects of breed (Yorkshire vs. Landrace) and selection (unselected vs. selected) on litter size. By comparing the litter sizes of sows from different lines, the researchers can determine if there is a significant difference in litter size between the breeds and if selection for increased litter size has an impact.
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