Deciphering physiological basis of yield gain in India wheat cultivars
| Autor: | Ashutosh Kushwah, Ashok Kumar, K. B. Gaikwad, Naresh Kumar Bainsla, Ajay Arora, Rajbir Yadav, Suman Gupta |
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| Rok vydání: | 2017 |
| Předmět: |
0106 biological sciences
Canopy Physiology business.industry Crop yield fungi food and beverages 04 agricultural and veterinary sciences Biology Mega 01 natural sciences Agronomy Genetic gain Agriculture Yield (wine) 040103 agronomy & agriculture Genetics 0401 agriculture forestry and fisheries Cultivar Leaf area index business Agronomy and Crop Science 010606 plant biology & botany |
| Zdroj: | Cereal Research Communications. 45:512-524 |
| ISSN: | 1788-9170 0133-3720 |
| Popis: | Physiological breeding complementing the conventional approach is increasingly being explored in wheat in view of stagnating annual genetic yield gain. Designing improved plant types required knowledge about physiological traits associated with yield gain in the past. Fourteen wheat varieties including 12 historically important and popular (mega) wheat cultivars and two recently registered varieties were observed for various physiological traits for two years. Both breeding period and genotypes within breeding period accounted for significant differences for most of the physiological traits. Regression analysis indicated curvilinear trend for leaf area index (LAI), flag leaf area, and root length and root weight. Near perfect leaf area index (LAI 5.94) with semi-erect leaves and higher flag leaf area was observed in all time mega variety HD 2967 indicated the importance of plant architecture and crop canopy in yield maximization. Linear declining trend was observed for coleoptile length, number of stomata... |
| Databáze: | OpenAIRE |
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