Oki Nobuhiko, Sayama Takashi, Ishimoto Masao, Yokota Ikuko, Kaga Akito, Takahashi Masakazu, Takahashi Motoki
National Agriculture and Food Research Organization, Kyushu Okinawa Agricultural Research Center, 2421 Suya, Koushi, Kumamoto 861-1192, Japan.
National Agriculture and Food Research Organization, Western Region Agricultural Research Center, 6-12-1 Nishifukatsu, Fukuyama, Hiroshima 721-8514, Japan.
Breed Sci. 2018 Dec;68(5):554-560. doi: 10.1270/jsbbs.18087. Epub 2018 Nov 23.
Manipulating the genetic control of plant height is essential in soybean breeding to increase yield through the enlargement of the plant size while preventing lodging. A Japanese soybean germplasm, Y2, has distinctively shorter inter-node lengths than those of recently developed Japanese cultivars and is expected to provide new variation to prevent lodging. A quantitative trait loci (QTL) analysis for plant height-related traits was conducted using F individuals derived from a cross between the elite Japanese cultivar Fukuyutaka and Y2. A major QTL for average inter-node length (AIL) and plant height was identified on chromosome 13 and named (QTL for short inter-node on chromosome 13). The Y2 allele of was partially dominant for plant height. exhibited no effect on either days to flowering or number of main stem nodes. The AILs and plant heights of the near-isogenic lines containing the Y2 allele of in the genetic background of Fukuyutaka were significantly less than those of Fukuyutaka. No significant differences between the near-isogenic lines and Fukuyutaka were observed for seed yield and flowering date, indicating that will be useful in developing cultivars with short plant heights without having negative effects on yield potential and days to flowering.
在大豆育种中，通过扩大植株大小同时防止倒伏来提高产量，调控株高的遗传控制至关重要。一种日本大豆种质Y2，其节间长度明显短于最近培育出的日本品种，有望为防止倒伏提供新的变异。利用日本优良品种福余丰和Y2杂交产生的F个体，对与株高相关的性状进行了数量性状位点（QTL）分析。在13号染色体上鉴定出一个控制平均节间长度（AIL）和株高的主要QTL，并命名为（13号染色体上短节间QTL）。该QTL的Y2等位基因对株高呈部分显性。它对开花天数或主茎节数均无影响。在福余丰遗传背景下含有该QTL的Y2等位基因的近等基因系的AIL和株高显著低于福余丰。近等基因系与福余丰在种子产量和开花日期上未观察到显著差异，这表明该QTL在培育矮秆品种且对产量潜力和开花天数无负面影响方面将很有用。
