关键词: 甘蓝型油菜, 人工合成系, 特长果, 农艺性状, 经济性状

Abstract: In this study 21 specially long pod lines were identified from 169 artificially resynthesized Brasica napus lines. The lengths of pod in the middle of the main raceme of these lines are normally over 12 cm, with the body length over 10 cm. Among these lines the one with the longest average pod length was "H218", the average pod length 18.12 cm, the body length 15.25 cm. In this line the longest single plant average pod length was 19.34 cm, the body length 16.20 cm. In "H218", an extreme pod length of 30.5 cm was observed, with a body length of 25 cm. These specially long pod lines are completely different in genetic origin from those formerly reported specially long pod mutants. The lengths of pods and of the body in the long pod lines in the present study are much longer than those formerly reported. These specially long pod lines would have important values in rapeseed breeding and genetic studies. In the parents of these specially long pod lines no evident long pod characteristics was observed. So the specially long pod character was brought about in the process of segregation and selection of the offspring. The mechanism of formation of the long pod character and its inheritance need to be further studied.

Key words: Brassica napus L. RESYNTHESIZED LINES, SPECIALLY LONG POD, AGRONOMIC TRAIT, ECONOMIC TRAIT