トウジンビエ選抜効果の日本とインドネシアでの評価(品種・遺伝資源)  [in Japanese] Evaluation of the Efficiency of Selection of Pearl Millet in Japan and Indonesia(Genetic Resources and Evaluation)  [in Japanese]

トウジンビエ(Pennisetum typhoideum Rich.)の子実収量を向上させるための集団選抜を短期間で行い,かつ広域適応性を付与するため,選抜とその効果の評価を日本とインドネシアの2ヵ国で行った.早生,短稈,長穂の3形質での選抜を日本のポット栽培で,その選抜効果の評価をインドネシアの畑で行ったところ,緯度の異なる2ヵ国で栽培することにより農業形質についての選抜と評価を1年間で行うことが可能であった.なお,遺伝的獲得量から推定した遺伝率は出穂・成熟日が0.36,稈長が0.59,穂長が0.41の値が得られ,これら形質で選抜の効果があることを示した.また,穂長と出穂・成熟日の間の表現型相関は-0.38,遺伝相関は-0.97,穂長と稈長の間の表現型相関は0.24,遺伝相関は0.73の値が得られ,本集団では長穂個体は早生の,また短穂個体短稈のは傾向を示した.

The efficiency of selection for early matuyring, short culm and long panicle in a pearl millet population ICMV89074 was evaluated. It was possible to evaluate the efficiency of selection in a year because the materials selected in Japan were evaluated in Indonesia. Heritability values estimated by the genetic gain were 0.36 for heading/maturing date, 0.59 for culm length and 0.41 for panicle length. Thus, the selection was effective for all traits. The genetic and phenotypic correlations for panicle length vs. heading/maturing data were -0.38 and -0.97, respectively, and those for panicle length vs. culm length, they were 0.24 and 0.73, respectively. In this population, a long panicle plant tended to be early heading/maturing and a short panicle plant tended to be a short culm.