The Simple and Rough Screening Method of Phosphorus Deficient Tolerance Rice
2015
Hwang, W.H., NICS, RDA, Jeonju, Republic of Korea | Kim, D.W., NICS, RDA, Jeonju, Republic of Korea | Jeong, J.H., NICS, RDA, Jeonju, Republic of Korea | Jeong, H.Y., NICS, RDA, Jeonju, Republic of Korea | Lee, H.S., NICS, RDA, Jeonju, Republic of Korea | Choi, K.J., NICS, RDA, Jeonju, Republic of Korea | Lee, G.H., NICS, RDA, Jeonju, Republic of Korea | Lee, I.J., Kyung pook national university, Deagu, Republic of Korea | Oh, S.H., NICS, RDA, Jeonju, Republic of Korea
Even though phosphorus (P) is essential element for plant growth and development, it is not enough for crop production in soil. To breed more P deficient tolerance rice, screening and selection in rice population is needed. We tried to develop more simple and rough screening method for breeding of P deficient tolerance rice. In P deficient condition, tiller number was dramatically decreased among yield components in rice. Though this result, we confirmed tiller number could be the best marker in screening of P deficient tolerance rice. 480 rice genetic resources were cultivated in rice bed tray filled with P deficient soil for four weeks and each dry weight was measured. Among them, the 55 kinds of genetic resource were selected then cultivated in paddy field with 3 fertilizer conditions. Plant dry weight and tiller number in ripening stage were shown significant difference according to P condition. Plant dry weight and tiller number in ripening stage was highly correlated especially in P deficient condition. Furthermore, the tiller number in ripening stage and plant dry weight in rough screening were shown high degree correlation. Though these results, we might expect measuring of plant dry weight after cultivation in rice bed tray filled with P deficient soil could be a simple and effective screening method in selection of P deficient tolerance rice.
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