Differences of the canopy surface temperature between F1s and their parents in sugar beet （<I>Beta vulgaris</I> L. ssp. <I>vulgaris</I>）

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  • USUI Yasuhiro
    Memuro Upland Farming Research Division, Hokkaido Agricultural Research Center, NARO Present address: Central Region Agricultural Research Center, NARO
  • TAGUCHI Kazunori
    Memuro Upland Farming Research Division, Hokkaido Agricultural Research Center, NARO Present address: Central Region Agricultural Research Center, NARO
  • HIRAFUJI Masayuki
    Memuro Upland Farming Research Division, Hokkaido Agricultural Research Center, NARO Present address: The Institute for Sustainable Agro-ecosystem Services, The University of Tokyo

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Other Title
  • テンサイ一代雑種およびそれらの親系統の群落表面温度の系統間差
  • テンサイ イチダイ ザッシュ オヨビ ソレラ ノ シン ケイトウ ノ グンラク ヒョウメン オンド ノ ケイトウ カンサ

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Abstract

To investigate the effect of heterosis between F1s (F1:First filial generation) and their parents, we investigated the differences of canopy surface temperature (Tc) among six sugar beet genotypes.<br>　Three of the genotypes: “NK195BR”, “NK235BR” and “NK388” were tested as parents, while the other three “NK235BR×NK195BR”, “NK195BR×NK388” and “NK235BR×NK388” were tested as F1s.<br>　The diurnal variation of Tc was maximal between 10:00 and 14:00. The maximum difference among genotypes was about 2.7 ℃ in daytime and the Tc of “NK195BR×NK388” showed the lowest among the other genotypes in 103 days after transplanting. The differences of Tc among genotypes increased with increasing vapor pressure deficit. Comparing the 6 hours mean Tc value of six genotypes from 10:00 to 16:00 and in descending order of its value, the results showed “NK388” > “NK235BR” > “NK195BR” > “NK235BR×NK195BR” > “NK235BR×NK388” > “NK195BR×NK388”. Although there was a trend that the yield of F1s was higher than that of their parents with high Tc, it is necessary to clarify the relationship between Tc and yield in the future.

Journal

  • Climate in Biosphere

    Climate in Biosphere 21 (0), 48-53, 2021

    The Society of Agricultural Meteorology of Japan

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