GAMETE SELECTION FOR SPECIFIC COMBINING ABILITY 



381 



cause of their significantly lower moisture content at harvest and yields not 

 significantly different in test crosses from A344 X tester. 



The eight inbreds tested as possible sources of germ plasm for the improve- 

 ment of A344 were A97, A315, A348, A367, A396, OhSlA, Ia234, and 111.4226. 



TABLE 24.4 



DISTRIBUTION OF PER CENT MOISTURE AND 

 YIELD OF 35 F, PLANTS OF A344 X MORRIS U 

 CROSSED TO S.C. TESTERS A357 X A392 AND 

 A357 X A385* 



^(Mean A344 

 X tester) 



(Mean A344 X tester) 



* Classes separated by one or more than one LSD (5 per cent) from the 

 mean of A344Xtester. 



TABLE 24.5 



DISTRIBUTION OF PER CENT MOISTURE AND YIELD OF 

 TEST CROSSES OF 8 INBRED LINES AS SOURCES OF GAM- 

 ETES. CROSSES ARE OF THE TYPE (A344 X INBRED) X TEST- 

 ERS* 



^(Mean of A344 

 X tester) 



i 



(Mean of A344 X tester) 

 * Classes separated by one or more than one LSD (5 per cent) from the mean of A344 Xtester. 



The distribution for yield and moisture of test crosses of A344 X Inbred is 

 given in Table 24.5. Three inbreds, Ia234, A396, and A97, demonstrated 

 yield potential significantly higher than A344. 



Golden King and Murdock are old, well-adapted varieties formerly 

 grown extensively in southern Minnesota. Test crosses of thirty-two Golden 

 King gametes X A25 and thirty-eight Murdock gametes X A73 are shown in 

 Tables 24.6 and 24.7, respectively. 



No gamete from Golden King exceeded A25 significantly in test-cross 

 yields. However, eight not different in yield were significantly earlier, and 



