Screening high potassium efficiency potato genotypes and physiological responses at different potassium levels

Zhenpeng DENG; Jin YANG; Yuanya CHEN; Haohao HAN; Xun LIU; Xiaoping YI; Jichun WANG; Changwen LYU

doi:10.15835/nbha49112190

Notulae Botanicae Horti Agrobotanici Cluj-Napoca (Mar 2021)

Screening high potassium efficiency potato genotypes and physiological responses at different potassium levels

Zhenpeng DENG,
Jin YANG,
Yuanya CHEN,
Haohao HAN,
Xun LIU,
Xiaoping YI,
Jichun WANG,
Changwen LYU

Affiliations

Zhenpeng DENG: Southwest University, College of Agronomy and Biotechnology, Nr. 2 Rd Tiansheng, Beibei, Chongqing; Chongqing Key Laboratory of Biology and Genetic Breeding for Tuber and Root Crops, College of Agronomy and Biotechnology, Southwest University, Nr. 2 Rd Tiansheng, Beibei, Chongqing
Jin YANG: Southwest University, College of Agronomy and Biotechnology, Nr. 2 Rd Tiansheng, Beibei, Chongqing; Chongqing Key Laboratory of Biology and Genetic Breeding for Tuber and Root Crops, College of Agronomy and Biotechnology, Southwest University, Nr. 2 Rd Tiansheng, Beibei, Chongqing
Yuanya CHEN: Southwest University, College of Agronomy and Biotechnology, Nr. 2 Rd Tiansheng, Beibei, Chongqing; Chongqing Key Laboratory of Biology and Genetic Breeding for Tuber and Root Crops, College of Agronomy and Biotechnology, Southwest University, Nr. 2 Rd Tiansheng, Beibei, Chongqing
Haohao HAN: Southwest University, College of Agronomy and Biotechnology, Nr. 2 Rd Tiansheng, Beibei, Chongqing; Chongqing Key Laboratory of Biology and Genetic Breeding for Tuber and Root Crops, College of Agronomy and Biotechnology, Southwest University, Nr. 2 Rd Tiansheng, Beibei, Chongqing
Xun LIU: Southwest University, College of Agronomy and Biotechnology, Nr. 2 Rd Tiansheng, Beibei, Chongqing; Chongqing Key Laboratory of Biology and Genetic Breeding for Tuber and Root Crops, College of Agronomy and Biotechnology, Southwest University, Nr. 2 Rd Tiansheng, Beibei, Chongqing
Xiaoping YI: Southwest University, College of Agronomy and Biotechnology, Nr. 2 Rd Tiansheng, Beibei, Chongqing; Chongqing Key Laboratory of Biology and Genetic Breeding for Tuber and Root Crops, College of Agronomy and Biotechnology, Southwest University, Nr. 2 Rd Tiansheng, Beibei, Chongqing
Jichun WANG: Southwest University, College of Agronomy and Biotechnology, Nr. 2 Rd Tiansheng, Beibei, Chongqing; Chongqing Key Laboratory of Biology and Genetic Breeding for Tuber and Root Crops, College of Agronomy and Biotechnology, Southwest University, Nr. 2 Rd Tiansheng, Beibei, Chongqing
Changwen LYU: Southwest University, College of Agronomy and Biotechnology, Nr. 2 Rd Tiansheng, Beibei, Chongqing; Chongqing Key Laboratory of Biology and Genetic Breeding for Tuber and Root Crops, College of Agronomy and Biotechnology, Southwest University, Nr. 2 Rd Tiansheng, Beibei, Chongqing

DOI: https://doi.org/10.15835/nbha49112190
Journal volume & issue: Vol. 49, no. 1

Abstract

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Potato (Solanum tuberosum L.) growth and production is highly dependent on potassium (K) levels in the soil. Southwest China is the largest potato production region but it has low availability of soil potassium. To assess the genetic variation in K use efficiency, 20 potato genotypes were collected to compare the yield and K content in a pot experiment. Moreover, ‘Huayu-5’ and ‘Zhongshu-19’ were cultivated in five K applications to investigate the K distribution and sucrose in different organs. The results indicated that there were highly significant effects of K, genotype and K×G interactions on tuber yield, plant and tuber K content, plant K uptake efficiency and K harvest index. Cluster analysis classified 20 potato genotypes into four types: DH (high efficiency at low and high K application), LKH (high efficiency at low K application), HKH (high efficiency at high K application) and DL (low efficiency at low and high K application). The potassium distribution percentage in the tubers of the potassium-efficient genotype was higher than that of the potassium-inefficient genotype under low potassium application. The sucrose content in the tuber gently declined as the application of K rose in both cultivars, and that in the tuber of ‘Huayu-5’ was higher than that in ‘Zhongshu-19’. ‘Huayu-5’ reached the highest yield when the potassium application was 159.45 kg ha-1, and ‘Zhongshu-19’ reached the highest yield when the potassium application was 281.4 kg ha-1. This study indicated that genetic variation for K utilization efficiency existed among 20 genotypes, and yield in low K application and relative yield were suitable criteria for screening K utilization efficiency genotypes.

potato; potassium efficiency; potassium distribution; sucrose

Published in Notulae Botanicae Horti Agrobotanici Cluj-Napoca

ISSN: 0255-965X (Print); 1842-4309 (Online)
Publisher: AcademicPres
Country of publisher: Romania
LCC subjects: Agriculture: Forestry; Agriculture: Agriculture (General)
Website: https://www.notulaebotanicae.ro/index.php/nbha

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