Study on Sourse-sink Characteristics of Two-line Indica Hybrid Rice
A comparative study on the source sink characteristics of two line indica hybrid rice with those of three line hybrid rice was conducted during heading to ripening stages. The highly effective LAI and adjusted photosynthetic potential, total sink capacity, grade of filled grain, ratio of APP to sink,dry matter production and grain yield were analyzed. Results indicated that the significant difference of source sink characteristics occurred within the same line hybrid rice but not between the two kinds of hybrids, there was no obvious heterosis of source sink characteristics of two line indica hybrid rice.It was concluded that selecting better rice parents with high yield source sink structure and utilizing superiority of two line system was important to develop two line indica hybrid rice.