基于三维空间下水稻粒形分类的探讨

以目前生产上应用的不同类型优质水稻品种及本课题组近年来有代表性育种材料的稻谷籽粒为研究对象,通过测定其稻谷的千粒重、粒长、粒宽、粒厚,计算稻谷长宽比、宽厚比,进行相关性分析,并按照不同的粒形分类方法进行分类。结果表明,稻谷千粒重与粒厚、粒长呈极显著正相关,与粒宽、长宽比呈显著正相关。为更直观展现稻谷籽粒的粒形,将三维空间下的水稻粒形分为细圆柱形、粗圆柱形、椭圆柱形及鹅卵石形四类。育成稻谷千粒重50 g左右新品种的粒形选种目标:谷粒粒长14.0 mm左右,粒宽3.0 mm左右、粒厚2.5 mm左右,粒形为粗圆柱形。

First record of the family Meenoplidae(Hemiptera: Fulgoromorpha) from Pakistan

Pakistan has a rich fauna of planthoppers but members of the family Meenoplidae have not been reported from this region. In this study Nisa atrovenosa of the family Meenoplidae is recorded for the first time from Khyber Pakhtunkhwa Province of Pakistan. A morphological description and illustrations are provided.