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一是把好苗源(0.4cm)质量关南美白对虾由于生长快、产量高、味道好、出肉率高而被广大虾农青睐,从国外引进后的10多年中,各地用母本繁殖的苗种有一代、二代甚至多代之分,价格也随代数之别有差异,而重要的是第一代苗体质最优、价格也最高;用第一代苗长成亲体作母本繁殖的苗即为?
First, the good seedling source (0.4cm) quality of Penaeus vannamei due to rapid growth, high yield, good taste, a high rate of meat was favored by shrimp farmers, imported from abroad for more than 10 years, all over with the female parent reproduction Of the seed generation, the second generation or even many generations, the price difference with the algebra, but the important thing is the first generation of seedlings optimal physical fitness, the highest price; the first generation of seedlings grow into a parent for the mother Breeding seedlings is?