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首页> 外文期刊>Journal of genetics >Genetic analyses for deciphering the status and role of photoperiodic and maturity genes in major Indian soybean cultivars
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Genetic analyses for deciphering the status and role of photoperiodic and maturity genes in major Indian soybean cultivars

机译：遗传分析解体光周期和成熟基因在主要印度大豆品种中的状态和作用

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Allelic combinations of major photoperiodic (E1, E3, E4) and maturity (E2) genes have extended the adaptation of quantitative photoperiod sensitive soybean crop from its origin (China similar to 35 N-ay latitude) to both north (up to similar to 50 N-ay) and south (up to 40 S-ay) latitudes, but their allelic status and role in India (6-35 N-ay) are unknown. Loss of function and hypoactive alleles of these genes are known to confer photoinsensitivity to long days and early maturity. Early maturity has helped to adapt soybean to short growing season of India. We had earlier found that all the Indian cultivars are sensitive to incandescent long day (ILD) and could identify six insensitive accessions through screening 2071 accessions under ILD. Available models for ILD insensitivity suggested that identified insensitive genotypes should be either e3 /e4 or e1 (e1-nl or e1-fs) with either e3 or e4. We found that one of the insensitive accessions (EC 390977) was of e3 /e4 genotype and hybridized it with four ILD sensitive cultivars JS 335, JS 95-60, JS 93-05, NRC 37 and an accession EC 538828. Inheritance studies and marker-based cosegregation analyses confirmed the segregation of E3 and E4 genes and identified JS 93-05 and NRC 37 as E3E3E4E4 and EC 538828 as e3e3E4E4. Further, genotyping through sequencing, derived cleaved amplified polymorphic sequences (dCAPS) and cleaved amplified polymorphic sequences (CAPS) markers identified JS 95-60 with hypoactive e1-as and JS 335 with loss of function e3-fs alleles. Presence of photoperiodic recessive alleles in these two most popular Indian cultivars suggested for their role in conferring early flowering and maturity. This observation could be confirmed in F (2) population derived from the cross JS 95-60 x EC 390977, where individuals with e1-as e1-as and e4e4 genotypes could flower 7 and 2.4 days earlier, respectively. Possibility of identification of new alleles or mechanism for ILD insensitivity and use of photoinsensitivity in Indian conditions have been discussed.
机译：主要光纤（E1，E3，E4）和成熟（E2）基因的等位基因组合延长了从其起源（中国类似于35个N-AY纬度）的定量光周期敏感大豆作物的适应北方（最多与50 N-AY）和南部（最多40个S-AY）纬度，但他们的等位基因地位和印度的角色（6-35 N-AY）是未知的。已知这些基因的功能和脱氧等位基因丧失，以赋予光控敏感性，漫长的日子和早期成熟度。早期成熟度有助于使大豆适应印度的短期季节。我们早些时候发现，所有印度品种对白炽灯漫长的一天（ILD）敏感，可以通过筛选2071年的措施来确定六种不敏感的探索。用于ILD不敏感性的可用模型建议鉴定的不敏感基因型应具有E3或E4的E3 / E4或E1（E1-N1或E1-FS）。我们发现，其中一个不敏感的摘录（EC 390977）是E3 / E4基因型，并用四种ILD敏感品种JS 335，JS 95-60,193-05，NRC 37和加入EC 538828杂交。遗传研究和基于标记的CoSegreation分析证实了E3和E4基因的偏析，并将JS 93-05和NRC 37鉴定为E3E3E4E4和EC 538828作为E3E3E4E4。此外，通过测序的基因分型，衍生的裂解扩增的多晶序列（DCAP）和切割的扩增多晶序列（帽）标记物用Hypoactive E1-AS和JS 335鉴定了JS 95-60，其丧失功能E3-FS等位基因损失。这两个最受欢迎的印度品种中的光周期隐性等位基因的存在表明它们在赋予早期开花和成熟时的作用。该观察可以在衍生自交叉JS 95-60 x EC 390977的F（2）群体中确认，其中具有E1-AS和E4E4基因型的个体分别为e4E4基因型分别为早期的7和2.4天。已经讨论了鉴定新的等位基因或ILD的机制的可能性，并且已经在印度条件下使用了光控敏感性。

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