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Identification and characterization of a novel long juvenile resource AGS 25
Genetic Resources and Crop Evolution ( IF 2 ) Pub Date : 2021-01-02 , DOI: 10.1007/s10722-020-01055-7
Sanjay Gupta , Giriraj Kumawat , Soniya Yadav , Rachana Tripathi , Nisha Agrawal , Shivakumar Maranna , Gyanesh K. Satpute , Gireesh Channappa , Mamta Arya , Sayed M. Husain , Virender S. Bhatia , Nanita Devi , Philips Varghese , Shivaji P. Mahatre , Kamendra Singh , A. N. Shrivastav , Sanjay Pandey , Yogendra Mohan

Soybean [Glycine max (L.) Merr.], a quantitative short day crop, readily flowers with a little vegetative biomass under short day conditions and poses a challenge for developing high yielding soybean cultivars for tropical and sub-tropical countries. The long juvenility trait helps in gaining biomass under short days by delaying flowering and has helped to establish soybean as a commercially cultivated crop in these countries. A new soybean long juvenile (LJ) germplasm resource AGS 25 was identified by planting germplasm for 2 years under normal (22 June) and shorter (21 July and 21 August) day lengths. Evaluation of AGS 25 along with 252 germplasm accessions in 2 years at eleven locations (19.2610° N to 29.0222° N) could confirm its latitudinal consistency. Inheritance studies conducted under short day winter conditions identified a single recessive allele controlling long juvenility in four F2 populations. The genomic region for this trait was located at chromosome 16 and it explained 30% of the total phenotypic variation. Evaluation of 13 popular varieties and one hundred twenty seven advanced breeding lines (ABLs) (AGS 25 × three conventional juvenile varieties), during short day winter conditions of lower latitudes (19.2644° N), revealed that AGS 25 took maximum days to first flower (R1) (57 days) and attained good plant height (49.6 cm). Evaluation of ABLs identified high yielding segregants with early maturity (up to 90 days). Identified resource opens the possibility for development of early maturing high yielding long juvenile soybean varieties suitable for delayed as well as winter sown conditions.



中文翻译:

新型长少年资源AGS 25的鉴定与表征

大豆[大豆最大[L.)Merr。],一种定量的短日作物,在短日条件下容易开花,营养生物量很少,并且为热带和亚热带国家开发高产大豆栽培种带来了挑战。较长的幼年性状通过延迟开花有助于在短时间内获得生物量,并有助于在这些国家中将大豆确立为商业种植作物。通过在正常(6月22日)和较短(7月21日和8月21日)的日龄下种植2年,确定了一种新的大豆长幼(LJ)种质资源AGS 25。在11年内(19.2610°N至29.0222°N)对AGS 25和252种种质进行了评估,可以确认其纬度一致性。2人口。此性状的基因组区域位于16号染色体,它解释了总表型变异的30%。在低纬度冬季(19.2644°N)的短日冬季条件下,对13个受欢迎的品种和一百二十七个高级育种系(AGS 25×三个常规少年品种)的评估显示,AGS 25最多花了第一天的花(R1)(57天),株高(49.6 cm)。对ABL的评估确定了高产的分离子,且具有提前成熟(长达90天)的特性。查明的资源为开发适合延迟和冬季播种条件的早熟高产长幼大豆品种开辟了可能性。

更新日期:2021-01-02
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