ACTA AGRICULTURAE BOREALI-SINICA ›› 2021, Vol. 36 ›› Issue (S1): 62-71. doi: 10.7668/hbnxb.20192153

Special Issue: Oil crops

• Crop Genetics & Breeding·Germplasm Resources·Biotechnology • Previous Articles     Next Articles

Screening of Peanut Germplasm Resources Resistant to Low Calcium in Acid Red Soil Area

TANG Kang1, ZENG Ningbo1,2,3, ZHANG Wanqing1, ZHANG Hao1,2,3, WAN Shubo4, LIU Dengwang1,2,3, LI Lin1,2,3   

  1. 1. Agricultural College of Hunan Agricultural University, Changsha 410128, China;
    2. Changsha Branch of National Peanut Engineering Technology Research Center, Changsha 410128, China;
    3. Hunan Peanut Engineering Technology Research Center, Changsha 410128, China;
    4. Biological Research Center of Shandong Academy of Agricultural Sciences, Jinan 250100, China
  • Received:2021-03-30 Published:2021-12-28

Abstract: Screening low calcium tolerant germplasm is of great significance for the effective utilization of acid red soil and the expansion of peanut planting area.A field experiment was conducted to study the effects of application of 750 kg/ha calcium fertilizer (CaO) and no application of calcium fertilizer (CK) on 24 indexes including morphological traits, chlorophyll content (SPAD), yield and its components and low calcium tolerance coefficient of 105 peanut germplasm resources from different regions in typical acid low calcium soil (pH 5.44, exchangeable calcium 376.0 mg/kg, water-soluble calcium 11.2 mg/kg) in Southern China.The results showed that:compared with calcium application, peanut seedling emergence rate, SPAD value, pod yield, full fruit number per plant, total fruit number per plant, kernel rate, pod plumpness and kernel quality were decreased in different degrees under natural low calcium treatment, in which pod yield and empty fruit rate were significantly different.Through principal component analysis, the low calcium tolerance coefficient of 24 evaluation indexes could be reduced to 8 principal components, with a cumulative contribution rate of 78.001%.The contribution rate of each principal component was the highest in yield per plant (26.396%) and full fruit rate (24.951%), indicating that the yield per plant and full fruit rate could best represent the response of different peanut varieties to low calcium under low calcium acid conditions.Taking the relative yield and low calcium tolerance coefficient of peanut as characteristic variables, the low calcium tolerance of 105 peanut varieties could be divided into five grades by cluster analysis:extremely strong low calcium tolerance, strong low calcium tolerance, moderate low calcium tolerance, sensitive and high sensitive.The proportion of each type of peanut varieties was 1.90%, 0.95%, 18.10%, 78.10% and 0.95% respectively, indicating that most peanut germplasm resources in China were sensitive to low calcium, however, there are also extremely strong and strong tolerant germplasm, which laid a good foundation for carrying out ecological breeding of low calcium tolerance.

Key words: Peanut, Germplasm resources, Red soil, Calcium stress, Agronomic traits, Yield

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Cite this article

TANG Kang, ZENG Ningbo, ZHANG Wanqing, ZHANG Hao, WAN Shubo, LIU Dengwang, LI Lin. Screening of Peanut Germplasm Resources Resistant to Low Calcium in Acid Red Soil Area[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2021, 36(S1): 62-71. doi: 10.7668/hbnxb.20192153.

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