Characteristics of Yunnan Province rice landrace core collections under phosphorus deficiency

Abstract

Abstract: Soil phosphorus (P) deficiency is a major yield-limiting factor in rice production.Employing 526 rice landrace accessions from 5 rice-planting regions and 16 prefectures in Yunnan Province,this paper studied their P-deficiency tolerance characteristics by comparing the relative plant dry weight under acid red soil condition.The results showed that Northwest Yunnan cold highland japonica rice-planting region was most abundant in P-deficiency tolerance core collection of indica,and there was no significant difference in japonica among five ecological zones of rice landraces.Nujiang,Lijiang,Dehong,Wenshan,Xishuangbana and Yuxi were most abundant in P-deficiency tolerance core collection of indica,and Lijiang,Wenshan and Chuxiong were most abundant in P-deficiency tolerance core collection of japonica.Indica had a higher P-deficiency tolerance than japonica.The P-deficiency tolerance of rice was significantly related with its genetic diversity,rice breeding and acid red soils.

Key words: Rice landrace core collection, Yunnan Province, Relative plant dry weight, Phosphorus deficiency

CLC Number:

Q917
S511

SHEN Shiquan, ZENG Yawen, PU Xiaoying, DU Juan, LI Shenchong . Characteristics of Yunnan Province rice landrace core collections under phosphorus deficiency[J]. Chinese Journal of Applied Ecology, 2005, 16(8): 1569-1572.

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