利用自交不親和性育成甘藍之一代雜種（二）

The Utilization of Self-incompatibility to Breed F1 Hybrid Cabbage (2)

1.本試驗係續前一年品種群間相互交配所選出優良親本，再行系統選拔。2.前一年所選出葉深自交不親和性三系統，在本試驗中繼續予以檢定。其中二個系統的後代，全為自交不親和性，但另一個自交不親和性系統的後代分離出二個自交親和個體與三個自交不親和個體。其他前年為自交親和性個體，本年檢定結果，其後代仍為自交不親和性。3.前年為不親和性後代的系統內交配，大部分為不親和性或為不完全親和性。同一親品種之異系統間之交配，本試驗所用葉深系統依組合不同而有親和性與不親和性。但不同親品種之系統間交配，皆為親和性。4.依組合適應性檢定結果，選出早生品質優良五個組合，計其親本為葉深4個系統（已達到自交不親和），永靖早生2個系統，初秋1個系統，作下年試驗之材料。

1. This is a continued report of breeding work for years to develop hybrid F1 variety cabbage more fittable for summer planting in Taiwan or to be planted under tropical environment. First report of it had been publicated last year. 2. Test on the completeness of self-incompatibility of strains of various cabbage varieties which had been segregated in previous years found that 4 strains of Yehsen var. with very good quality are completely selfincompatible. The will be used as the parent-stocks to be crossed reciprocally or with 2 strains of Yung-Chin-Early var. and 1 strain of Chu-Chiu var. for combination test. The later two are of very promising quality though the self-incompatibility is not yet to be completed.