IDENTIFICATION AND UTILIZATION OF A DELAYED FLOWERING CHARACTER IN SOYBEANS FOR SHORT-DAY CONDITIONS
IDENTIFICATION AND UTILIZATION OF A DELAYED FLOWERING CHARACTER IN SOYBEANS FOR SHORT-DAY CONDITIONS
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DOI：
10.1016/0378-4290(79)90017-0
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发表时间：
1979-01-01
影响因子：
5.8
通讯作者：
KIIHL, RAS
中科院分区：
文献类型：
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作者：
HARTWIG, EE;KIIHL, RAS
密西西比州斯通维尔的两种大豆 [Glycine max(L.) Merr.] 种质品系‘Santa Maria’和‘PI 159925’被归类为早熟组 VIII，在短日照条件下（日照少于 14 小时）开花晚。开花反应与布拉格品种“D72-7842”相似的育种系与“圣玛丽亚”杂交。在长日照和短日照条件下评估 F3 品系首次开花的天数。长日照条件下的首次开花天数不能用于预测短日照条件下的首次开花天数。在短日照条件下，350 个品种中只有 9 个品种在首次开花前的天数内与“圣玛丽亚”相当。在第二项研究中，从杂交“Tracy”×（“Hill”דPI 159925”）中选择了晚花、农艺学上优异的品系。在分离短日照条件下生长的群体时，可以容易地选择晚花性状。预计这些晚花类型将在短日照条件下充分生长，以允许机器收获，并且不需要极长的生长季节。
Two soybean [Glycine max(L.) Merr.] germplasm strains, ‘Santa Maria’ and ‘PI 159925’, which are classified in early Maturity Group VIII at Stoneville, Mississippi, are late-flowering under short-day conditions (daylength less than 14 h). A breeding line similar in flowering response to the cultivar Bragg, ‘D72–7842’ was crossed with ‘Santa Maria’. Days to first flowering of F3lines were evaluated under long-day and short-day conditions. Days to first flowering under long-day conditions could not be used to predict days to first flowering under short-day conditions. Under short-day conditions only nine of 350 lines grown equaled ‘Santa Maria’ in days to first flowering. In a second study, late flowering, agronomically superior lines were selected from the cross ‘Tracy’ × (‘Hill’ × ‘PI 159925’). The late-flowering character can be selected readily in segregating populations grown under short-day conditions. It is anticipated that these late-flowering types will make adequate growth under short-day conditions to permit machine harvest and will not require an extremely long growing season.