外源基因导入后水稻粒形的变化

Kernel Morphological Variation after Guiding Exogenous Gene

利用6个供体亲本与1个受体亲本一一对应杂交,而后进行反复回交,比较了后代稳定品系与亲本之间的粒形变化。结果表明,3个千粒重小于受体亲本的供体亲本后代,千粒重都有不同程度的增大,主要原因是粒形增宽。3个千粒重大于受体亲本的供体亲本后代,其中2个千粒重降幅较大(1个稍有增加),主要原因是粒形变短。

6 donor parents and 1 receptor parent were selected in this test, by crassing one after another and back crossing, and compared kernel morphological variation between the progenys of steady strain and their parents. The results showed that 1000-kernel weight was all added in varing degrees for 3 donor parent progenys.These donor parents were smaller than the receptor parent in 1000-kemel weight. It is because the kernel shape was wider than before.2 1 000-kernel weight of the progenys of steady strain were more reduced（ 1 added slightly）. These donor parents were bigger than the receptor parent in 1000-kernel weight. It is because the kernel shape was shorter than before.