１９９３～１９９４年对３４份零式果枝陆地棉的果枝始节、果枝角度等２０多项农艺经济性状进行了鉴定。结果说明零式果枝品种植株稍高，叶片大，且厚，铃较小，衣分低，纤维粗短，在生产上很难被直接利用，但在现有零式果枝种质中，却具有一项或多项性状较为理想的品种可供利用。近年，我们已成功地转育了零式果枝性状，培育出了早熟、优质、密植高产的早松２新品系。 From 1993 to 1994, more than 20 agronomic traits, such as the beginning of fruiting branches and the angle of fruiting branches, were evaluated in 34 types of zero-yield fruit cultivars. The results showed that the plantlets with zero fruit size were slightly higher in height, with larger leaves, thicker leaves, smaller bolls, lower apposition points and shorter fibers, which were hard to be directly utilized in production. However, One or more varieties with better traits are available. In recent years, we have succeeded in breeding the zero fruit-branch traits and have cultivated the early-maturing, high-quality, high-density and high-yielding early-maturing 2 new lines.