Inheritance of a long juvenile period under short-day conditions in soybean
Inheritance of a long juvenile period under short-day conditions in soybean
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DOI：
10.1590/s1415-47572002000400016
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发表时间：
2002-01-01
影响因子：
2.1
通讯作者：
Kiihl, Romeu Afonso de S.
中科院分区：
文献类型：
--
作者：
Carpentieri-Pípolo, Valéria;Almeida, Leones Alves de;Kiihl, Romeu Afonso de S.
大豆品种具有童期长(LJP)的特点，在短日照条件下延迟开花。这一特性在增加大豆对低纬度的适应范围方面可能是重要的，并为同一纬度内的播种时间提供了更大的灵活性。对MG/BR22(Garimpo)大豆品种的长幼期遗传进行了研究，为培育适应短日照条件的品种提供依据。4个品种(‘Parana’、‘Bossier’、‘Bragg’和‘Davis’)相互杂交，并与MG/BR 22(‘Garimpo’)杂交。这项研究是在短日照条件下(早播)在温室和田间进行的，地点是巴拉那州朗德里纳(南纬23°22‘)。每天对亲本和F、F、F群体进行开花评估。Parana×Bossier杂交F-2和F-3世代的基因型比分别为15：1(p>；0.95，x(2)检验)和8：71(p=0.193)，表明LJP性状存在双基因互作和重复隐性上位性效应。MG/BR 22(GARIMPO)×巴拉纳杂交F-2群体的分离结果为3：1(p=0.166)，表明MG/BR 22(GARIMPO)和巴拉那品种在同一个基因座上存在差异。同样，在MG/BR 22(加林波)×波西耶杂交中，3：1(p=0.065)的分离表明，这两个品种在开花天数上存在单个基因座的差异。戴维斯品种与巴拉那品种(AA)具有相同的LJP基因。经典开花布拉格与MG/BR 22(GARIMPO)组合的F_1分离结果为15：1(p=0.138)，表明这两个品种在开花上存在两个不同的基因座。品种的AABB为Parana，Bossier为AABB，MG/BR 22(Garimpo)为AABB。隐性纯合子中的单个基因座不会产生LJP。
The long juvenile period (LJP) characteristic of soybean (Glycine max L. Merrill) cultivars delays flowering under short-day conditions. This trait may be important in increasing the adaptation range of soybean to low latitudes and provides greater flexibility for sowing times within the same latitude. The inheritance of the long juvenile period was studied in the MG/BR22 (Garimpo) soybean cultivar to provide knowledge to support the development of cultivars adapted to short day conditions. Four cultivars ('Parana', 'Bossier', 'Bragg', and 'Davis') were crossed among each other and with MG/BR 22 ('Garimpo'). The study was conducted under short-day conditions (early sowing) in a greenhouse and in the field, in Londrina, Parana, (23degrees22' south latitude). The parents and the F, F, and F, populations were assessed daily for flowering. The genotype ratios of 15:1 (p > 0.95, chi(2) test) and 8:71 (p = 0.193) for the F-2 and F-3 generations, respectively, obtained for the Parana x Bossier cross indicated a case of digenic interaction with a duplicate recessive epistatic effect for the LJP character. Segregation of the F-2 population from the MG/BR 22 (Garimpo) x Parana cross resulted in the expected ratio of 3:1 (p = 0.166, indicating that the MG/BR 22 (Garimpo) and Parana cultivars differed at a single locus. Similarly, in the MG/BR 22 (Garimpo) x Bossier cross, a 3:1 (p = 0.065) segregation indicated that these two cultivars differed at a single locus for number of days to flowering. The Davis cultivar had the same gene for LJP as the Parana cultivar (aa). The F, segregation of the classic flowering Bragg with MG/BR 22 (Garimpo) cross resulted in a 15:1 (p = 0.138) ratio, indicating that these two cultivars differed at two loci for flowering. The genotypes assigned to the cultivars were aaBB for Parana, AAbb for Bossier and aabb for MG/BR 22 (Garimpo). A single locus in recessive homozygosis does not produce LJP.