From 1954 to 1990, the diversity index increases from 2.30 to 2.60, the dominance index decreases from 0.59 to 0.45, and the fragmentation index of high quality landscapes increases from 0.33 to 0.42. These changes mostly ascribe to urban land expanding and culture pond enlargement.
从1954年到1990年,景观多样性从2.30上升到了2.60,优势度由0.59下降到0.45,高功能景观破碎度由0.33上升到0.42。
The result showed that the genetic diversity index of all traits were relatively large, grain weight per plant had the highest genetic diversity index, followed by TGW and panicle length.
结果表明:各性状的遗传多样性指数较大,且多样性指数最高是单株粒重,其次是千粒重和穗长;
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