【摘要】 以中国和加拿大分别经过20多年群体改良的8个新型栽培种改良群体为材料,在田间试验条件下,对单株块茎重、单株块茎数、淀粉含量、薯形、芽眼深浅、薯皮色、薯肉色7个性状进行了比较研究。试验结果表明,中、加两国的学者在新型栽培种资源改良与创新上采取显著不同的策略。中国突出块茎产量的选择,而加拿大重视块茎商品率的选择;中国追求群体的一致性,关注资源自身性状的表现,而加拿大则相对重视保留群体的异质性。更多还原

【Abstract】 Major economical characters of 8 seedling populations of Neotuberosum, 4 populations from China and the rest from Canada, were compared under field cultivation in 2005 in Harbin China.Characters compared were tuber weight per hill, tuber number per hill, specific gravity, tuber shape, eye depth, skin color and flesh color.The experimental results showed that strategies adopted by Chinese and Canadian breeders on innovation and improvement of Neotuberosum were different significantly.In China, selection preference was yield, but the marketable tuber rate was ranked first in Canada.The identity and performance of population per se were stressed by Chinese, but heterogeneity of populations was preferred and kept by Canadian scientists.更多还原