油用向日葵之什雜育種研究

VI自交系，自交系與品種及品種間什雜後代什種優勢之比較

謝桑煙　郭源耀

摘　　要

利用單什交種，頂什交種及品種間什交種比較什種優勢之表現，結果以單什交種顯示最高之什種優勢。每公頃產量計可較親本增收72.9％，較標準品種（CK）Jupiter增收16.1％，其次為頂什交種，計可較親本增收52.1％，較CK增收13.3％，而以品種間什交種之什種優勢表現最低，計僅較親本增收14.6％，較CK增收12.5％。

Studies on Breeding of Oil-rich Sunflower Hybrids VI.

A Comparison on Heterosis of Hybrids Among Single-cross, Top-cross, and Intervarietal

S. Y. Hsieh and Y. A. Cuo

Summary

Comparing the heterosis among single-cross, and intervarietal, we get the results as follows: the yield of single-cross is the highest and it shows 72.1% and 16.1% per hectare higher than those of parent varieties and check variety (Jupiter) respectively.  The top-cross shows 52.1% and 13.3% higher than parent varieties and ck variety.  Where the heterosis of intervarieties shows the lowest and 14.6% and 12.5% higher than parent varieties and ck variety, respectively.

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