UC Westside Male Pistachio Cultivar Bloom Synchrony
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Solution Overview
Problem
Current male pistachio varieties, such as 'Famoso' and 'Peters', face challenges in synchronizing bloom with female 'Kerman' pistachio trees under varying winter chilling conditions, leading to inefficient pollination due to irregular and asynchronous blooming, especially in low to moderate chill years.
Innovation Solution
The introduction of the new male pistachio cultivar 'UC Westside', which has a reduced juvenility period and blooms later in the spring, producing inflorescences in Year 3 and a dense bloom in Years 4 and 5, ensuring better synchrony with 'Kerman' across different chilling scenarios.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing male cultivars like 'Famoso' and 'Peters' are used for pollination, then pollination can occur under certain chilling conditions, but bloom synchrony with female 'Kerman' trees deteriorates under varying winter chilling scenarios
Solution Approach 1:
The patent applies parameter changes by selecting and propagating a male cultivar with specific genetic characteristics that result in altered bloom timing parameters. The 'UC Westside' cultivar was selected from a population to have a later bloom period that specifically compensates for the early blooming tendency of 'Famoso' under high chill conditions, while maintaining reliable pollination function across all chilling scenarios.
2Reliability
If male cultivars with early bloom timing are used, then pollination occurs under high chill conditions, but bloom synchrony deteriorates under low to moderate chill conditions
Solution Approach 1:
The patent changes the bloom timing parameter of the male cultivar from early (as in 'Famoso') to late blooming. This parameter change allows the cultivar to maintain synchrony with female trees under low to moderate chill conditions while still providing reliable pollination under high chill conditions due to the extended bloom period and overlapping timing.
3Reliability
If male cultivars with long juvenility period are used like 'Peters
Solution Approach 1:
The patent changes the juvenility period parameter from long (as in 'Peters' with 5+ years) to short (approximately 3 years). This was achieved by selecting from a population of seedlings and propagating those that exhibited accelerated transition to reproductive stage, thereby increasing productivity and reducing the time to commercial production.
Data Source
AI summary
A new male pistachio cultivar (Pistacia vera L.) designated as ‘UC Westside’, to be used advantageously as a pollenizer for commercial female pistachio varieties. ‘UC Westside’ blooms later in the spring than most existing male pistachio cultivars and is particularly characterized by a reduced juvenility period, dense blooms in years with low chill, good pollen viability, and improved bloom synchrony with standard female pistachio varieties, especially ‘Kerman’. It may be used as a replacement for the male cultivar ‘Peters’.