陆地棉显性无腺体品系杂种优势及配合力研究

以７个显性无腺体陆地棉品系和４个常规品种（系）为材料，按ＮＣＩ设计，对２８个组合的杂种Ｆ１进行了分析。结果表明。杂种Ｆ１具有明显的优势，２８个组合所研究的１５个性状中全部具有中亲优势，６个性状具有高亲优势，４个性状具有竞争优势；配合力分析的１１个性状中，株高、衣分、纤维长度和麦克隆值主要受基因加性效应控制，而子棉产量、皮棉产量、单株铃数、铃重和子指等性状同时受基因加性和非加性效应作用，显无０７３是丰产的显性无腺体品系，而显无２６０是较好的优良品系，组合显无０７３Ｘ泗棉２号在重要性上表现较好。

Study on Heterosis and Combining Ability between Dominant Gland- less Strains and Commercial Varieties in Upland Cotton(Gossypium hirsutum L.)

The 28 hybrids F1 were studied between 7 dominant glandless strains and 4 com- mercial varieties in an incomplete diallel crossing system. The hybrids F1 showed an appre- ciable amount of heterosis (including Mid - parent heterosis, Highest - performing parent heterosis and check heterosis). Of all 11 characteristics measured, plant height, lint per- cent, fiber length and micronaire were mainly controlled by additive genes, and seed cotton yield, lint yield. boll number per plant, boll weight, seed index were affected by both addi- tive and non-additive genes. Xianwu 073 was a dominant glandless strain with high yield while Xianwu 260 with relatively good fiber quality. Among 28 combinations, Xiawu 073 X Simian 2 was the best in some important characters.