T型杂交小麦后代产量和品质性状的变化趋势

本文利用 T 型杂交小麦组合 YUCC-78的后代 F_2、F_3、F_4、F_5、F_6和F 6(F_4),分析了产量和品质性状的变化趋势。分析结果表明:(1)杂种 F_2的产量急剧下降,极显著地低于常规推广良种。从 F_2起产量连续下降,直到 F_4下降到最低,F_5和 F_6又有明显地回升的趋势;(2)杂种 F_2的容重和千粒重急剧下降,极显著地低于常规推广良种,但 F_2～F_6各世代容重的变化不大,各世代间无显著差异;(3)杂种 F_2的干、湿面筋含量低于常规推广良种,但与常规推广良种没有显著差异。随着世代的向后推移,各世代的干、湿面筋含量有下降的趋势。

THE CHANGING TREND OF YIELD AND QAULITY CHARACTERS IN HYBRID WHEAT WITH T.TIMOPHEEVI CYTOPLASM

Through F2 to F6 yield and qaulity characters were analysed.The results were as follows: (1)The yield of F2 dropped dramatically.From F2,the yield per mu of progenies did not drop successively until the yield of F4 dropoed to the lowest The yield per mu of F5 and F6 rose near to the level of F2. (2)The test w.t.and 1000 kernel w.t.of F2 dropped dramatical- ly too,but there were no differences progenies from F2 to F6. (3)From F2 to F6 the content of wet and dry glutentdropped gradually,but the content of F2 ...