一种联会消失突变水稻的发现及其细胞学研究

从品种轮回４２２的群体中发现一不育单株，经细胞学观察证明是发生了消失突变，由于该植株的花粉母细胞在减数分裂终变期晚期平均有８．６９个二价体发生了消失，占二价体总数的７２．４％，发生联会消失的最多二价体数目为１２，根据联会消失的最多价体数目以及单位细胞的二价体频率，确定该联合消失变异为完全联会消失变异。

Isolation and Cytological Identification of a Desynaptic Variant in Rice

A sterile variant was found from the population of a japonica rice variety Lunhui 422. Cytological investigation was conducted in meiosis. It is showed that the sterility was caused by desynapsis. As there were 8.69 bivalents in average occurred to be desynaptic, moreover, the most number of the desynaptic bivalents reached 12 at post diakinsis. It can be considered that the desynaptic variation is a complete desynapsis found in rice so far.