Chao Dong , Furong Xu , Cuifeng Tang , Xinxiang A , Enlai Zhang , ayun Yang , Feifei Zhang , Tengqiong Yu , Luyuan Dai

Biotechnology and Germplasm Resources Institute, Yunnan Academy of Agricultural Sciences; Yunnan Provincial Key Lab of Agricultural Biotechnology; Key Lab of Crop Gene Resources and Germplasm Enhancement on Southwest China, Ministry of Agriculture; Scientific Observation Station of Rice Germplasm Resources on Yunnan, Ministry of Agriculture; Kunming, 650223; P. R. China
Author    Correspondence author
Rice Genomics and Genetics, 2012, Vol. 3, No. 6   doi: 10.5376/rgg.2012.03.0006
Received: 14 Apr., 2012    Accepted: 06 Jun., 2012    Published: 11 Jun., 2012

This article was first published in Molecular Plant Breeding (2010, Vol.8, No.6, 1166-1171) in Chinese, and here was authorized to translate and publish the paper in English under the terms of Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Dong et al., 2012, Preliminary Evaluation on Introgression Lines Derived from DJY1 as Recurrent Parent in Response to Soil Low Nitrogen, Vol.3, No.6 33-38 (doi: 10.5376/rgg.2012.03.0006)

In order to screen the tolerance to low nitrogen germplasms and to apply them into Japonica rice production in the high plateau zone, and it will be helpful to increase production efficiency and protect the environment. A total of 2064 introgression lines derived from Dianjingyou1, an improved and released variety in Yunnan high plateau zone as recurrent parent, were grown under two different soil nitrogen contents. They were evaluated in tolerance to low nitrogen by using SPAD value as criterion. The results showed that SPAD mean values of the introgression line used showed normal distributions under both the two different soil nitrogen contents. Significant positive correlations were found between SPAD mean value and either effective panicle number or spike per panicle. Two introgression lines derived from Khazar (BC₃F ₃) or Chhomrong (BC₃F₄) as donor parent, were preliminarily selected as low-nitrogen tolerant germplasms based on their SPAD mean values greater than the 95% critical value in the one-tailed test. Six introgression lines derived from one among Basmati370 (BC₃F₃), Type3 (BC₃F₃), KholeMavshi (BC₃F₃), Ajaya (BC₃F₃), Doddi (BC₃F₃) and Yuqiugu (BC₄F₃) as donor parent were primarily considered as sensitive germplasm to low nitrogen based on their SPAD mean values less than the 5% critical value in the one-tailed test. The introgression lines we got could be applied into breeding for tolerance to low nitrogen or nitrogen high efficiency in Japonica production in the high plateau zone in the future.

SPAD-value; Tolerance to low-nitrogen; Sensitive to low-nitrogen; Germplasm; Rice