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Variation in Australian durum wheat germplasm for productivity traits under irrigated and rainfed conditions: genotype performance for agronomic traits and benchmarking
The Journal of Agricultural Science ( IF 2 ) Pub Date : 2020-10-29 , DOI: 10.1017/s0021859620000817
Gururaj Kadkol , Alison Smith , Brian Cullis , Karine Chenu

A set of durum wheat genotypes from New South Wales (NSW, Durum Breeding Australia (DBA) Northern Program), South Australia (SA, DBA Southern Program and Australian Grain Technology), ICARDA and CIMMYT (International Centre for Research in Dryland Agriculture and International Centre for Maize and Wheat Improvement) was evaluated over 3 years (2012–2014) in field trials containing rainfed and watered blocks in Narrabri, NSW, Australia. Data on yield and other agronomic traits were analysed using a multi-environment trial approach that accommodated the factorial treatment structure (genotype by irrigation regime) within individual trials. Considerable variation was observed in the durum germplasm for productivity and grain quality traits. DBA Bindaroi (NSW) and 101042 (ICARDA) were the top yielders in watered and rainfed blocks, respectively. The yield was positively and strongly related to both harvest index and grains/m2, but grains/m2 was negatively related to thousand grain weight (TGW) and positively related to screenings. TGW and screenings were strongly negatively related and TGW and grains/m2 showed a weak positive relationship. Promising genotypes were identified, with superior traits to both the bread wheat check, EGA Gregory and the durum check, Caparoi. Overall, lines from SA and ICARDA were superior for yield but those from NSW were superior for quality parameters including TGW and screenings. These results suggested the possibility of developing high yielding high-quality durum varieties by crossing NSW lines with SA, CIMMYT and ICARDA lines through simultaneous selection for yield, TGW and low screenings. The results also suggested that productivity in rainfed conditions was positively related to productivity under watering, but further research is required to establish this.

中文翻译:

灌溉和雨养条件下澳大利亚硬粒小麦种质生产力性状的变异:农艺性状的基因型表现和基准

一组来自新南威尔士州(NSW,Durum Breeding Australia (DBA) Northern Program)、南澳大利亚(SA、DBA Southern Program 和 Australian Grain Technology)、ICARDA 和 CIMMYT(国际旱地农业研究中心和国际研究中心)的一组硬粒小麦基因型玉米和小麦改良中心)在澳大利亚新南威尔士州纳拉布里的 3 年(2012-2014 年)田间试验中进行了包含雨养和浇水块的田间试验评估。使用多环境试验方法分析了产量和其他农艺性状的数据,该方法在单个试验中适应了因子处理结构(灌溉制度的基因型)。在硬粒小麦种质中观察到生产力和籽粒品质性状的显着变化。DBA Bindaroi (NSW) 和 101042 (ICARDA) 分别是浇水和雨养地块中产量最高的。2,但粒/米2与千粒重(TGW)呈负相关,与筛选呈正相关。TGW 和筛分呈强负相关,TGW 和粒数/m2呈弱正相关。确定了有前景的基因型,其性状优于面包小麦检查 EGA Gregory 和硬粒小麦检查 Caparoi。总体而言,来自 SA 和 ICARDA 的品系在产量方面具有优势,但来自 NSW 的品系在包括 TGW 和筛选在内的质量参数方面具有优势。这些结果表明,通过同时选择产量、TGW 和低筛选,将 NSW 品系与 SA、CIMMYT 和 ICARDA 品系杂交,开发高产优质硬粒小麦品种的可能性。结果还表明,雨养条件下的生产力与浇水条件下的生产力正相关,但需要进一步的研究来确定这一点。
更新日期:2020-10-29
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