As a national program, the GRDC's National Variety Trial provides independent comparative crop variety testing using standardised trial management and data generation, collection and dissemination.
NVTs web presence is considered world-leading in its mapping capability which allows growers to search for individual trial sites and results by year, location and crop.
NVT Online provides access to independent results via the internet-accessed database that ensures a common approach and uniformity across the system.
In 2012 improvements were made to NVT Online, including the ability to search Google maps on the website by postcode and crop type and the collation of all relevant information in a single information bubble.
Each bubble includes information about yield and grain quality, disease ratings, end-point royalties, trial locations and links to other relevant information.
How to videos about sites and the website were also added, including a video demonstrating how to locate information on new varieties and another on locating variety brochures.
Central to the success of the NVT program has been good communication in delivering the program and the application of agreed protocols for trial management and for data generation, collection and dissemination.
The NVT is a voluntary system and all plant breeders are invited to submit seed for testing. Nominated lines must meet the NVT acceptance criteria of seed being available at a commercial scale for growers to purchase after two years of NVT testing.
After a variety is released by a breeding company it can remain in the NVT testing process for up to five years, depending on the popularity of the variety with growers in a region. After five years, varieties that constitute less than three per cent of deliveries are withdrawn.
This means NVT trials contain three types of breeding material: lines that are within two years of commercial release; lines that are being repeated for a second year, sometimes referred to as retentions; and released varieties.
It is rare for a line or variety to be tested at every NVT location but entries are not restricted by state boundaries. However, few Queensland varieties are grown in Western Australia.
Commercial varieties that are widely grown are used as comparisons against which other material in NVT can be benchmarked. The commercial varieties grown at each site include those used as market classification quality standards.
All trial management and data handling is run to a rigid timetable in order to rapidly deliver accurate information to assist growers with variety selection decisions.
Standard outcome-based protocols have been established for NVT trial site selection and management. However, service providers have the flexibility to use fertiliser and pesticides as required.
They can also apply district practices.
- Visit nvtonline.com.au for more.