International cooperative research for genetic evaluation on root penetration ability and root water absorption ability in potato

马铃薯根系较小，不易向深层土壤延伸，因此对干旱胁迫反应较弱。为了提高马铃薯根系的改良育种水平，我们研究了从荷兰引进的二倍体CxE群体的根质量差异，并在第5染色体上检测到一个有效的根质量QTL。根质量与植株早熟性和早期块茎膨大量呈高度相关，其中QTL位于根系QTL的同一位置。

Potato plants are week for drought stress because of its small root mass and less extension to deep soil layers. To enhance the improvement of root system in potato breeding, we examined the difference in root mass in a diploid CxE population introduced from the Netherlands and detected a effective QTL for root mass at Chromosome 5. The root mass showed highly correlations with plant earliness and early tuber bulking, of which QTLs were located at the same position of root QTL.