A NEW GENE AFFECTING THE TIME OF FLOWERING AND MATURITY IN SOYBEANS
A NEW GENE AFFECTING THE TIME OF FLOWERING AND MATURITY IN SOYBEANS
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DOI：
10.1093/oxfordjournals.jhered.a110349
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发表时间：
1987-05-01
影响因子：
3.1
通讯作者：
BERNARD, RL
中科院分区：
文献类型：
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作者：
MCBLAIN, BA;BERNARD, RL
在将Pd 1（密毛）转育到大豆[Glycine max（L.）梅尔。]品种'Harosoy'。F_4和F_5的分离比例均为1早：3晚（独立于Pd_1），表明存在一个晚熟基因座。选择L 64 -4830（具有正常短柔毛的一致晚期BC 5 F4植物后代）用于进一步测试。L 64 -4830 × Harosoy的F2代也表现出单一等位基因的迟熟分离，频率分布表明杂合子的迟熟性处于中间水平，但更接近迟熟纯合子。将L 64 -4830与具有E1、E2和E3的单一成熟等位基因取代的Harosoy成熟等位基因等株系进行测交。结果表明，未知等位基因不在这些位点上。未检测的等位基因4调节对人工延长光周期的光周期不敏感和早熟。由于Harosoy和L 64 -4830都是光周期敏感的，推测它们具有E4等位基因。因此，L 64 -4830中的等位基因命名为E5，Harosoy中的等位基因命名为de 5。'Clark'是成熟基因等长线的另一个重要背景，由于它与Harosoy的区别仅在于具有E2而不是Fe 2，因此它也必须具有e5等位基因。
Segregation for late maturity was noted in a fifth backcross (Harosoy6× Pl 80.837) made to transferPd1(dense pubescence) to the soybean [Glycine max(L.) Merr.] cultivar ‘Harosoy’. Selected progenies in both the F4and F5segregated 1 early:3 late (Independently ofPd1), indicating that a single locus for late maturity had been identified. L64–4830 (a uniformly late BC5F4plant progeny with normal pubescence) was selected for further testing. The F2of L64–4830 × Harosoy also showed segregation for a single allele for lateness, and the frequency distribution indicated that the heterozygote was intermediate in maturity but closer to the late homozygotes. Testcrosses of L64–4830 were made to Harosoy maturity-allele isolines that have single maturity-allele substitutions ofE1,E2, ande3. The results indicated that the unknown allele was not at any of these loci. The untested allelee4conditions photoperiod insensitivity to artificially extended photoperiods, and earliness. Since both Harosoy and L64–4830 are photoperiod sensitive, they presumably have theE4allele. Thus, the designationsE5for the allele in L64–4830 ande5for the allele in Harosoy are proposed for the new gene pair. ‘Clark’ is the other important background for maturity-gene isolines and, since it differs from Harosoy only in havingE2instead ofe2, it also must have thee5allele.