The research uses natural experimental means , adopting 2 X 4 bi - factor random experiment design.

本实验运用自然实验法(校本培训),采用2×4二因素随机实验设计.

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An crossing random experiment was conducted to analyse 10 agronomic characters of 20 cotton inbred lines.

通过对20个棉花不育繁殖自交(品)系的10个农艺性状的相关性和通径分析.

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